| Name | Nation | Sport | Games | Notes |
|---|
| Jørgen Graabak | Norway | Nordic combined | 2014 Winter, 2018 Winter, 2022 Winter | |
| Aad de Graaf | Netherlands | Track cycling | 1960 Summer, 1964 Summer | |
| Bobbie van de Graaf | Rowing | 1964 Summer | |
| Sander de Graaf | 2020 Summer, 2024 Summer | |
| Freek van de Graaff | 1964 Summer | |
| Jan van de Graaff | 1964 Summer | |
| Laurien van der Graaff | Switzerland | Cross country skiing | 2014 Winter, 2018 Winter, 2022 Winter | |
| Wim de Graaff | Netherlands | Speed skating | 1956 Winter, 1960 Winter | |
| Rob Graafland | Art competitions | 1936 Summer | |
| Corky de Graauw | Ice hockey | 1980 Winter | |
| Andrzej Grabarczyk | Poland | Athletics | 1988 Summer, 1992 Summer | |
| Robbie Grabarz | Great Britain | 2012 Summer, 2016 Summer | |
| Dieter Grabe | East Germany | Road cycling | 1968 Summer | |
| Uwe Grabe | Athletics | 1968 Summer | |
| Bill Graber | United States | 1932 Summer, 1936 Summer | |
| Enrico Graber | Italy | Luge | 1968 Winter | |
| Giovanni Graber | 1964 Winter, 1968 Winter | |
| Hans Graber | Switzerland | Rowing | 1960 Summer | |
| Rob Grabert | Netherlands | Volleyball | 1988 Summer, 1996 Summer | |
| Julia Grabher | Austria | Tennis | 2024 Summer | |
| Federico Grabich | Argentina | Swimming | 2012 Summer, 2016 Summer | |
| Mitko Grablev | Bulgaria | Weightlifting | 1988 Summer | |
| Dieter Grabner | Austria | Shooting | 1996 Summer | |
| Michael Grabner | Ice hockey | 2014 Winter | |
| Siegfried Grabner | Snowboarding | 1998 Winter, 2002 Winter, 2006 Winter, 2010 Winter | |
| Pauline Grabosch | Germany | Track cycling | 2024 Summer | |
| Igor Grabovetchi | Moldova | Wrestling | 1996 Summer | |
| Mariya Grabovetskaya | Kazakhstan | Weightlifting | 2008 Summer | |
| Mircea Grabovschi | Romania | Handball | 1976 Summer | |
| Igor Grabovsky | Soviet Union | Water polo | 1964 Summer | |
| Guido Grabow | West Germany | Rowing | 1984 Summer, 1988 Summer | |
| Volker Grabow | 1984 Summer, 1988 Summer | |
| Ewa Grabowska | Poland | Alpine skiing | 1984 Winter | |
| Henryk Grabowski | Athletics | 1952 Summer, 1956 Summer | |
| Jasmin Grabowski | Germany | Judo | 2016 Summer, 2020 Summer | |
| Lena Grabowski | Austria | Swimming | 2020 Summer | |
| Maciej Grabowski | Poland | Sailing | 2000 Summer, 2004 Summer, 2008 Summer | |
| Petra Grabowski | East Germany | Canoe sprint | 1972 Summer | |
| Zygmunt Grabowski | Poland | Art competitions | 1936 Summer | |
| Detlev Grabs | East Germany | Swimming | 1980 Summer | |
| Bert Grabsch | Germany | Road cycling | 2008 Summer, 2012 Summer | |
| Igor Grabucea | Moldova | Weightlifting | 2008 Summer | |
| Jurica Grabušić | Croatia | Athletics, Bobsleigh | 2004 Summer, 2006 Winter, 2008 Summer | |
| Aiga Grabuste | Latvia | Athletics | 2008 Summer, 2012 Summer | |
| Daniel Gráč | Czechoslovakia | Road cycling | 1964 Summer | |
| Alberto Graça | Portugal | Sailing | 1952 Summer | |
| Nenad Gračan | Yugoslavia | Football | 1984 Summer | |
| Frederick Grace | Great Britain | Boxing | 1908 Summer, 1920 Summer | |
| Spencer Grace | Australia | Rowing | 1948 Summer | |
| Josh Grace | Sailing | 2000 Summer | |
| Kate Grace | United States | Athletics | 2016 Summer | |
| Maurice Grace | Australia | Rowing | 1956 Summer | |
| Max Grace | New Zealand | Road cycling | 1964 Summer | |
| Ricky Grace | Australia | Basketball | 2000 Summer | |
| Rafayel Grach | Soviet Union | Speed skating | 1956 Winter, 1960 Winter, 1964 Winter | |
| Gustav Grachegg | Austria | Equestrian dressage | 1928 Summer | |
| Konstantin Grachev | Soviet Union | Athletics | 1956 Summer, 1960 Summer | |
| Varvara Gracheva | France | Tennis | 2024 Summer | |
| Tatyana Grachova | Russia | Volleyball | 1996 Summer, 2000 Summer | |
| Juan Gracia | Mexico | Polo | 1936 Summer | |
| Eduardo Graciano | Road cycling | 1996 Summer | |
| Leopold Gracias | Tanzania | Field hockey | 1980 Summer | |
| Gabriel Gracida | Mexico | Equestrian dressage | 1932 Summer, 1948 Summer | |
| David Gracie | Great Britain | Athletics | 1952 Summer | |
| Daniel Gracík [ Wikidata ] | Czech Republic | Swimming | 2024 Summer | |
| Zdravko Gracin | Yugoslavia | Rowing | 1972 Summer | |
| Luka Gračnar | Slovenia | Ice hockey | 2014 Winter, 2018 Winter | |
| Jean Graczyk | France | Track cycling | 1956 Summer | |
| E. Grad [ Wikidata ] | Fencing | 1900 Summer | |
| Anna-Maria Gradante | Germany | Judo | 2000 Summer | |
| Sam Graddy | United States | Athletics | 1984 Summer | |
| Étienne Grade | Belgium | Fencing | 1908 Summer | |
| Max Gradel | Ivory Coast | Football | 2020 Summer | |
| Peter Gradin | Sweden | Ice hockey | 1984 Winter | |
| Dick Gradley | Great Britain | Artistic gymnastics | 1960 Summer | |
| Kamila Gradus | Poland | Athletics | 1996 Summer | |
| Eva-Maria Gradwohl | Austria | 2008 Summer | |
| Arthur Grady | Great Britain | Water polo | 1956 Summer | |
| Donald Grady | Canada | Ski jumping | 1976 Winter | |
| Michael Grady | United States | Rowing | 2020 Summer, 2024 Summer | |
| Richard Grady | Canada | Ski jumping | 1976 Winter | |
| Jed Graef | United States | Swimming | 1964 Summer | |
| Carlos Graeff | Mexico | Canoe sprint | 1968 Summer | |
| Egbert de Graeff | Netherlands | Field hockey | 1960 Summer | |
| James Graeffe | Belgium | Speed skating | 1936 Winter | |
| Paul Graeffe | Bobsleigh | 1936 Winter | |
| Ragnar Graeffe | Finland | Athletics | 1952 Summer | |
| Lars Grael | Brazil | Sailing | 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer | |
| Marco Grael | 2016 Summer, 2020 Summer, 2024 Summer | |
| Martine Grael | 2016 Summer, 2020 Summer, 2024 Summer | |
| Torben Grael | 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer | |
| Josep Graells | Andorra | Athletics | 1988 Summer | |
| Herbert Graetz | Australia | Rowing | 1924 Summer | |
| Lennie von Graevenitz | South Africa | Boxing | 1952 Summer | |
| Albert Graf | Austria | Luge | 1980 Winter | |
| Andreas Graf | Track cycling | 2020 Summer | |
| Bernadette Graf | Judo | 2016 Summer, 2020 Summer | |
| David Graf | Germany | Boxing | 2016 Summer | |
| David Graf | Switzerland | Cycling BMX racing | 2016 Summer, 2020 Summer | |
| Erika Graf | Uruguay | Swimming | 1996 Summer | |
| Frigyes Gráf [ Wikidata ] | Hungary | Artistic gymnastics | 1908 Summer | |
| Karl Graf | Switzerland | Rowing | 1980 Summer | |
| Lajos Gráf | Hungary | 1912 Summer | |
| Lisa Graf | Germany | Swimming | 2016 Summer | |
| Ludwig Graf | Austria | Art competitions | 1928 Summer | |
| Ludwig Gräf | Saar | Shooting | 1952 Summer | |
| Margit Graf | Austria | Luge | 1972 Winter, 1976 Winter | |
| Olga Graf | Russia | Speed skating | 2014 Winter | |
| Robert Graf | United States | Canoe sprint | 1936 Summer | |
| Rolf Graf | Switzerland | Road cycling | 1952 Summer | |
| Steffi Graf | West Germany, Germany | Tennis | 1988 Summer, 1992 Summer | |
| Stephanie Graf | Austria | Athletics | 2000 Summer | |
| Walter Graf | Switzerland | Bobsleigh | 1968 Winter | |
| Cyril Graff | France | Shooting | 2012 Summer, 2016 Summer | |
| Edward Graff | United States | Rugby | 1924 Summer | |
| Anne-Caroline Graffe | France | Taekwondo | 2012 Summer | |
| Maurice Graffen | Canoe sprint | 1948 Summer, 1952 Summer, 1956 Summer | |
| Paul de Graffenried | Switzerland | Fencing | 1928 Summer, 1932 Summer, 1936 Summer | |
| Julio Graffigna | Argentina | Wrestling | 1960 Summer, 1964 Summer, 1968 Summer | |
| Andrew Graffin | Great Britain | Athletics | 2000 Summer | |
| Carl Graff-Wang | Norway | Handball | 1972 Summer | |
| Gillis Grafström | Sweden | Figure skating | 1920 Summer, 1924 Winter, 1928 Winter, 1932 Winter | |
| Cathrine Grage | Denmark | Speed skating | 2010 Winter | |
| Hanna Grages | Germany | Artistic gymnastics | 1952 Summer | |
| Daniela Graglia | Italy | Athletics | 2000 Summer | |
| Marc-André Gragnani | Canada | Ice hockey | 2018 Winter | |
| Stefanie van der Gragt | Netherlands | Football | 2020 Summer | |
| Alexander Graham | Australia | Swimming | 2020 Summer | |
| Ann Graham [ Wikidata ] | South Africa | Art competitions | 1936 Summer | |
| Bobby Graham | Great Britain | Athletics | 1936 Summer | |
| Chris Graham | Canada | Boxing | 1920 Summer, 1924 Summer | |
| Derek Graham | Great Britain | Athletics | 1964 Summer | |
| Doug Graham | Virgin Islands | Sailing | 1976 Summer | |
| Elka Graham | Australia | Swimming | 2000 Summer, 2004 Summer | |
| Ephraim Graham | United States | Equestrian eventing | 1912 Summer | |
| Glenn Graham | Athletics | 1924 Summer | |
| Hugh Graham | Canada | Equestrian jumping | 1984 Summer | |
| James Graham [ Wikidata ] | Great Britain | Artistic gymnastics | 1908 Summer | |
| James Graham | United States | Shooting | 1912 Summer | |
| John Graham | Canada | Athletics | 1988 Summer | |
| Juliet Graham | Equestrian eventing | 1976 Summer | |
| Keitani Graham | Federated States of Micronesia | Wrestling | 2012 Summer | |
| Kelvin Graham | Australia | Canoe sprint | 1988 Summer, 1992 Summer | |
| Kevin Graham | Canada | Water polo | 2008 Summer | |
| Kim Graham | United States | Athletics | 1996 Summer | |
| Laurie Graham | Canada | Alpine skiing | 1980 Winter, 1984 Winter, 1988 Winter | |
| Mark Graham | New Zealand | Diving | 1984 Summer | |
| Mark Anthony Graham | Canada | Athletics | 1992 Summer | |
| Maryanne Graham | United States | Swimming | 1976 Summer | |
| Matt Graham | Australia | Freestyle skiing | 2014 Winter, 2018 Winter, 2022 Winter | |
| Merwin Graham | United States | Athletics | 1924 Summer | |
| Naomi Graham | Boxing | 2020 Summer | |
| Noel Graham | Ireland | Rowing | 1980 Summer | |
| Norris Graham | United States | 1932 Summer | |
| Phil Graham | Canada | 1996 Summer, 2000 Summer | |
| Tim Graham | Great Britain | Athletics | 1964 Summer | |
| Toby Graham | Cross country skiing | 1956 Winter | |
| Tom Graham | Canada | Volleyball | 1976 Summer | |
| Tony Graham | New Zealand | Track cycling | 1988 Summer | |
| Trevor Graham | Jamaica | Athletics | 1988 Summer | |
| Wayne Graham | South Africa | Field hockey | 1996 Summer | |
| William Graham | Great Britain | 1908 Summer | |
| Winthrop Graham | Jamaica | Athletics | 1988 Summer, 1992 Summer, 1996 Summer | |
| John Grahame | United States | Ice hockey | 2006 Winter | |
| Roland Grahammer | West Germany | Football | 1988 Summer | |
| Viola Grahl | Field hockey | 1988 Summer | |
| Erika Grahm | Sweden | Ice hockey | 2014 Winter, 2018 Winter | |
| Arne Grahn | Finland | Tennis | 1924 Summer | |
| Bengt-Erik Grahn | Sweden | Alpine skiing | 1964 Winter, 1968 Winter | |
| Bo Grahn | Finland | Athletics | 1972 Summer | |
| Dieter Grahn | East Germany | Rowing | 1968 Summer, 1972 Summer | |
| Karl-Erik Grahn | Sweden | Football | 1936 Summer | |
| Sara Grahn | Ice hockey | 2010 Winter, 2018 Winter | |
| Sture Grahn | Cross country skiing | 1956 Winter | |
| Nikola Grahovac [ Wikidata ] | Croatia | Handball | 2024 Summer | |
| Josef Grahsl | Austria | Wrestling | 1936 Summer | |
| Georges Grain | France | Field hockey | 1968 Summer, 1972 Summer | |
| Gina Grain | Canada | Track cycling | 2008 Summer | |
| Veroeshka Grain | South Africa | Rugby sevens | 2024 Summer | |
| Isaac Grainger | New Zealand | Rowing | 2016 Summer | |
| Katherine Grainger | Great Britain | 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Susanne Grainger | Canada | 2016 Summer, 2020 Summer | |
| Cathy Grainger-Brain | Australia | Judo | 1992 Summer, 1996 Summer | |
| Alojzy Graj | Poland | Athletics | 1952 Summer | |
| Crisanto Grajales | Mexico | Triathlon | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Pedro Grajales | Colombia | Athletics | 1964 Summer, 1968 Summer | |
| Szczepan Grajczyk | Poland | Rowing | 1956 Summer, 1964 Summer | |
| Luis Grajeda | Mexico | Basketball | 1964 Summer, 1968 Summer | |
| Ruth Grajeda | Athletics | 2008 Summer | |
| Aleksander Grajf | Yugoslavia, Slovenia | Cross country skiing, Biathlon | 1984 Winter, 1988 Winter, 1992 Winter, 1998 Winter, 2002 Winter | |
| Ewa Grajkowska-Stańko | Poland | Canoe sprint | 1972 Summer | |
| Elisabeth Gram | Austria | Freestyle skiing | 2018 Winter | |
| Hannemor Gram | Norway | Alpine skiing | 1936 Winter | |
| Maurice Gramain | France | Fencing | 1936 Summer, 1948 Summer | |
| Arturo Gramajo | Argentina | Bobsleigh | 1928 Winter | |
| Henry Gramajo | Uruguay | Equestrian eventing | 2000 Summer | |
| Horacio Gramajo | Argentina | Bobsleigh | 1928 Winter | |
| Rady Gramane | Mozambique | Boxing | 2020 Summer | |
| Mats Grambusch | Germany | Field hockey | 2016 Summer, 2020 Summer, 2024 Summer | |
| Tom Grambusch | 2016 Summer, 2024 Summer | |
| Gilberto Gramellini | Italy | Wrestling | 1960 Summer | |
| Tina Gramkov | Denmark | Sailing | 2012 Summer | |
| Rudolf Gramlich | Germany | Football | 1936 Summer | |
| Panagiotis Grammatikopoulos | Greece | Weightlifting | 1992 Summer | |
| Serafim Grammatikopoulos | 1984 Summer | |
| Nikos Grammatikos | Handball | 2004 Summer | |
| Aleksandr Gramovich | Unified Team | Canoe sprint | 1992 Summer | |
| Oleg Grams | Russia | Handball | 2008 Summer | |
| Stein Gran | Norway | Football | 1984 Summer | |
| Julieta Granada | Paraguay | Golf | 2016 Summer | |
| Yohandri Granado [ Wikidata ] | Venezuela | Taekwondo | 2024 Summer | |
| Álvaro Granados | Spain | Water polo | 2020 Summer, 2024 Summer | |
| Encarna Granados | Athletics | 1992 Summer, 1996 Summer, 2000 Summer | |
| Enrique Granados | Water polo | 1920 Summer, 1924 Summer | |
| Enrique Granados | Swimming | 1952 Summer | |
| Roberto Granados | Guatemala | 1984 Summer | |
| Warren Granados | Costa Rica | Football | 2004 Summer | |
| Dominik Graňák | Slovakia | Ice hockey | 2018 Winter | |
| Einar Granath | Sweden | 1960 Winter | |
| Johan Granath | Speed skating | 1972 Winter, 1976 Winter, 1980 Winter | |
| Oloph Granath | 1976 Winter, 1980 Winter | |
| Cammi Granato | United States | Ice hockey | 1998 Winter, 2002 Winter | |
| Luciana Granato | Brazil | Rowing | 2008 Summer | |
| Tony Granato | United States | Ice hockey | 1988 Winter | |
| María José Granatto | Argentina | Field hockey | 2016 Summer, 2020 Summer, 2024 Summer | |
| Victoria Granatto | 2020 Summer | |
| Margherita Granbassi | Italy | Fencing | 2004 Summer, 2008 Summer | |
| Gérard Granclement | France | Cross country skiing | 1972 Winter | |
| Cédric Grand | Switzerland | Bobsleigh | 1998 Winter, 2002 Winter, 2006 Winter, 2010 Winter | |
| Eduard Grand | Romania | Shooting | 1936 Summer | |
| Moritz Grand | Switzerland | Rowing | 1948 Summer | |
| Pascale Grand | Canada | Athletics | 1992 Summer | |
| Ángel Granda | Spain | Sailing | 2020 Summer | |
| Andy Granda | Cuba | Judo | 2020 Summer, 2024 Summer | |
| Iria Grandal | Spain | Archery | 2012 Summer | |
| Alexandra Grande | Peru | Karate | 2020 Summer | |
| Matías Grande [ Wikidata ] | Mexico | Archery | 2024 Summer | |
| Rita Grande | Italy | Tennis | 1996 Summer, 2000 Summer | |
| Toni Grande | Spain | Football | 1968 Summer | |
| Emil Grandell | Sweden | Athletics | 1912 Summer | |
| Allegro Grandi | Italy | Road cycling | 1928 Summer | |
| Renzo Grandi | Weightlifting | 1960 Summer, 1964 Summer | |
| Stefano Grandi | Swimming | 1984 Summer | |
| Thomas Grandi | Canada | Alpine skiing | 1994 Winter, 1998 Winter, 2002 Winter, 2006 Winter | |
| Aaron Grandidier-Nkanang | France | Rugby sevens | 2024 Summer | |
| Gösta Grandin [ Wikidata ] | Sweden | Athletics | 1936 Summer | |
| Jocelyn de Grandis | France | Archery | 2000 Summer, 2004 Summer | |
| Jules Grandjean | Switzerland | Wrestling | 1924 Summer | |
| Michel Grandjean | Figure skating | 1952 Winter | |
| René Grandjean | France | Football | 1900 Summer | |
| Silvia Grandjean | Switzerland | Figure skating | 1952 Winter | |
| Vincens Grandjean | Denmark | Equestrian eventing | 1936 Summer | |
| Yoris Grandjean | Belgium | Swimming | 2008 Summer | |
| Léandre Grandmoulin | Art competitions | 1936 Summer | |
| Daniel Grando | France | Ice hockey | 1968 Winter | |
| Alessandro Grandoni | Italy | Football | 2000 Summer | |
| Daneja Grandovec | Slovenia | Athletics | 2016 Summer | |
| Alexandre Grand’Pierre [ Wikidata ] | Haiti | Swimming | 2024 Summer | |
| Emilie Grand'Pierre | 2020 Summer | |
| Naomy Grand'Pierre | 2016 Summer | |
| Véronique Grandrieux | France | Athletics | 1980 Summer | |
| Léna Grandveau | Handball | 2024 Summer | |
| Ivan Granec | Yugoslavia | Football | 1920 Summer | |
| João Graneiro | Brazil | Volleyball | 1980 Summer | |
| István Granek | Hungary | Canoe sprint | 1952 Summer | |
| Halvor Egner Granerud | Norway | Ski jumping | 2022 Winter | |
| Guy Granet | Great Britain | Shooting | 1948 Summer | |
| Erik Granfelt | Sweden | Artistic gymnastics | 1908 Summer | |
| Hans Granfelt | Athletics, Fencing | 1920 Summer, 1936 Summer | |
| Nils Granfelt | Artistic gymnastics | 1912 Summer | |
| Henri Grange | France | Basketball | 1956 Summer, 1960 Summer | |
| Jean-Baptiste Grange | Alpine skiing | 2006 Winter, 2014 Winter, 2018 Winter | |
| Ken La Grange | South Africa | Boxing | 1948 Summer | |
| Lara Grangeon | France | Swimming, Marathon swimming | 2012 Summer, 2016 Summer, 2020 Summer | |
| David Granger | United States | Bobsleigh | 1928 Winter | |
| Joaquim Granger | Portugal | Artistic gymnastics | 1952 Summer | |
| Michele Granger | United States | Softball | 1996 Summer | |
| Noel Granger | Australia | Wrestling | 1956 Summer | |
| Hervé Granger-Veyron | France | Fencing | 1984 Summer, 1992 Summer | |
| Michel Grangier | Wrestling | 1972 Summer, 1976 Summer | |
| Runar Granholm | Finland | Tennis | 1924 Summer | |
| Svante Granholm | Sweden | Ice hockey | 1968 Winter | |
| Ernest Granier | France | Sailing | 1936 Summer | |
| Lucie Granier | Handball | 2024 Summer | |
| Nicola Granieri | Italy | Fencing | 1964 Summer, 1968 Summer, 1972 Summer, 1976 Summer | |
| Yalçın Granit | Turkey | Basketball | 1952 Summer | |
| Éva Gránitz | Hungary | Judo | 1992 Summer, 1996 Summer | |
| Hanna Granitzki | Germany | Field hockey | 2020 Summer | |
| Mary Zenaida Granja [ Wikidata ] | Ecuador | Athletics | 2024 Summer | |
| Sergey Grankin | Russia | Volleyball | 2008 Summer, 2012 Summer, 2016 Summer | |
| Svetlana Grankovskaya | Track cycling | 2004 Summer, 2008 Summer | |
| Arne Morten Granlien | Norway | Nordic combined | 1980 Winter | |
| Markus Granlund | Finland | Ice hockey | 2022 Winter | |
| Mikael Granlund | 2014 Winter | |
| Petra Granlund | Sweden | Swimming | 2008 Summer | |
| Svante Granlund | Ice hockey | 1948 Winter | |
| Marcel Granollers | Spain | Tennis | 2012 Summer, 2024 Summer | |
| Marinus Jan Granpré Molière | Netherlands | Art competitions | 1924 Summer | |
| Berit Granquist | Sweden | Fencing | 1936 Summer | |
| Sylvester Granrose | United States | Tug of war | 1920 Summer | |
| Konrad Granström | Sweden | Artistic gymnastics | 1920 Summer | |
| Martina Granström | Swimming | 2012 Summer | |
| Otto Granström | Finland | Artistic gymnastics | 1908 Summer | |
| Alex Grant | Canada | Ice hockey | 2022 Winter | |
| Alexander Grant | United States | Athletics | 1900 Summer | |
| Andrew Grant | Australia | Volleyball | 2012 Summer | |
| Andy Grant | Saint Vincent and the Grenadines | Athletics | 2004 Summer | |
| Ann Grant | Zimbabwe | Field hockey | 1980 Summer | |
| Benjamin Grant | Sierra Leone | Athletics | 1988 Summer, 1992 Summer | |
| Bob Grant | Australia | 1956 Summer | |
| Bruce Grant | New Zealand | Alpine skiing | 1984 Winter | |
| Cameron Grant | Canada | Swimming | 1988 Summer | |
| Christine Grant | New Zealand | Alpine skiing | 1984 Winter | |
| Dalton Grant | Great Britain | Athletics | 1988 Summer, 1992 Summer, 1996 Summer | |
| Dick Grant | United States | 1900 Summer | |
| Howard Grant | Canada | Boxing | 1988 Summer | |
| Imogen Grant | Great Britain | Rowing | 2020 Summer, 2024 Summer | |
| Ingrid Grant | Alpine skiing | 1988 Winter | |
| Jerami Grant | United States | Basketball | 2020 Summer | |
| Joe Grant | Canada | Ice hockey | 1980 Winter | |
| Kara Grant | Modern pentathlon | 2004 Summer, 2008 Summer | |
| Kevin Grant | Football | 1976 Summer | |
| Linn Grant | Sweden | Golf | 2024 Summer | |
| Mary Grant | Canada | Archery | 1972 Summer | |
| Michel Grant | Sweden | Judo | 1980 Summer, 1984 Summer | |
| Peter Grant | Australia | Athletics | 1976 Summer | |
| Rhys Grant | Rowing | 2016 Summer | |
| Stephanie Grant | Judo | 2008 Summer | |
| Virginia Grant | Canada | Swimming | 1956 Summer | |
| Zilpha Grant | Great Britain | 1936 Summer | |
| Billy Grantham | Athletics | 1908 Summer | |
| Eric Grantham | Shooting | 1968 Summer | |
| Lindsay Grant-Stuart | Zimbabwe | Diving | 1964 Summer | |
| Gunnar Grantz | Norway | Rowing | 1912 Summer | |
| Philip Granville | Canada | Athletics | 1924 Summer | |
| Walter Granville-Smith | United States | Art competitions | 1928 Summer | |
| Frantz Granvorka | France | Volleyball | 2004 Summer | |
| Simon Grany | Athletics | 1920 Summer | |
| Caterina Granz | Germany | 2020 Summer | |
| Mirjana Granzov | Serbia and Montenegro | Alpine skiing | 1998 Winter | |
| Zouheir El Graoui | Morocco | Beach volleyball | 2020 Summer, 2024 Summer | |
| Hans-Ulrich Grapenthin | East Germany | Football | 1976 Summer | |
| Francisco Gras [ Wikidata ] | France | Art competitions | 1928 Summer | |
| Laurent Gras | Ice hockey | 1998 Winter, 2002 Winter | |
| Käthe Grasegger | Germany | Alpine skiing | 1936 Winter | |
| Rupert Grasegger | Bobsleigh | 1964 Winter | |
| Laura Grasemann | Freestyle skiing | 2014 Winter | |
| Jean-Pierre Graser | Luxembourg | Boxing | 1936 Summer | |
| Brynhild Grasmoen | United States | Alpine skiing | 1948 Winter | |
| Maddalena Grassano | Italy | Athletics | 1972 Summer | |
| Gianfranco Grasselli | Rowing | 1972 Summer | |
| Elisabeth Grasser | Austria | Fencing | 1936 Summer | |
| José Luis Grasset | Spain | Athletics | 1920 Summer | |
| Hans-Ulrich Graßhoff | West Germany | Volleyball | 1972 Summer | |
| Flavio Grassi | Italy | Sailing | 1992 Summer | |
| Giuseppina Grassi | San Marino | Athletics | 1976 Summer | |
| Giuseppina Grassi | Mexico | Road cycling | 2008 Summer | |
| Santiago Grassi | Argentina | Swimming | 2016 Summer, 2020 Summer | |
| Sylvette Grassi | France | Luge | 1968 Winter | |
| Vincenzo Grassi | Italy | Wrestling | 1964 Summer, 1968 Summer, 1972 Summer | |
| Camille Grassineau | France | Rugby sevens | 2016 Summer, 2020 Summer, 2024 Summer | |
| Daniel Grassl | Italy | Figure skating | 2022 Winter | |
| Ulrike Gräßler | Germany | Ski jumping | 2014 Winter | |
| Filippo Grasso | Italy | Boxing | 1968 Summer | |
| Tina Grassow | Germany | Short track speed skating | 2006 Winter | |
| Costel Grasu | Romania | Athletics | 1992 Summer, 1996 Summer, 2000 Summer | |
| Nicoleta Grasu | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Marcus Grate | Sweden | Cross country skiing | 2022 Winter | |
| Pablo Grate | Canoe sprint | 1992 Summer | |
| Windi Graterol | Venezuela | Basketball | 2016 Summer | |
| Wilhelm Gratschow | Germany | Boxing | 2008 Summer | |
| Matteo Iocchi Gratta | Italy | Water polo | 2024 Summer | |
| Gerry Gratton | Canada | Weightlifting | 1948 Summer, 1952 Summer | |
| Paul Gratton | Volleyball | 1984 Summer | |
| Benjámin Grátz | Hungary | Swimming | 2016 Summer | |
| Fritz Grau | Germany | Bobsleigh | 1936 Winter | |
| Jorge Grau | Cuba | Shooting | 2016 Summer, 2020 Summer | |
| Sandra Grau | Andorra | Alpine skiing | 1988 Winter | |
| Santiago Grau | Spain | Field hockey | 1988 Summer, 1992 Summer | |
| Vicky Grau | Andorra | Alpine skiing | 1992 Winter, 1994 Winter, 1998 Winter, 2002 Winter | |
| Bernhard Graubart | Austria | Football | 1912 Summer | |
| Özman Gıraud | Turkey | Shooting | 1972 Summer | |
| Tīna Graudiņa | Latvia | Beach volleyball | 2020 Summer, 2024 Summer | |
| Vladimir Graudyn | Soviet Union | Athletics | 1988 Summer | |
| Yuliya Graudyn | Russia | 1996 Summer, 2000 Summer | |
| Stephanie Grauer | Canada | Rowing | 2020 Summer | |
| Jean Graul | Switzerland | Sailing | 1964 Summer | |
| Olesya Graur [ Wikidata ] | Kazakhstan | Freestyle skiing | 2022 Winter | |
| Geert Grauss | Netherlands | Art competitions | 1928 Summer | |
| Hugo De Grauwe | Belgium | Weightlifting | 1980 Summer | |
| Dario Grava | France | Football | 1968 Summer | |
| Jean-Marc Grava | Athletics | 2000 Summer | |
| Dimitrios Gravalos | Greece | 2008 Summer | |
| Magnus Grävare | Sweden | Sailing | 1984 Summer | |
| Martin Grävare | 1984 Summer | |
| Carlos Grave | Portugal | Equestrian eventing | 2004 Summer | |
| Jan Rune Grave | Norway | Nordic combined | 2002 Winter | |
| Manuel Grave | Portugal | Equestrian eventing | 2024 Summer | |
| Arthur Gravel | Canada | Nordic combined | 1932 Winter | |
| Evens Gravel | Fencing | 1992 Summer, 1996 Summer | |
| François Gravel | France | Ice hockey | 1998 Winter | |
| Eric Graveline | Canada | Sailing | 1984 Summer | |
| Gerry Gravelle | Ski jumping | 1960 Winter | |
| Jean Gravelle | Ice hockey | 1948 Winter | |
| Eugène-Henri Gravelotte | France | Fencing | 1896 Summer | |
| Deborah Gravenstijn | Netherlands | Judo | 2000 Summer, 2004 Summer, 2008 Summer | |
| Claude Gravereaux | France | Field hockey | 1936 Summer | |
| Morten Graversen [ Wikidata ] | Denmark | Canoe sprint | 2024 Summer | |
| Carie Graves | United States | Rowing | 1976 Summer, 1984 Summer | |
| Edwin Graves | 1920 Summer | |
| Fred Graves | Canada | 1948 Summer | |
| James Graves | United States | Shooting | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer | |
| Jared Graves | Australia | Cycling BMX racing | 2008 Summer | |
| Laura Graves | United States | Equestrian dressage | 2016 Summer | |
| Peter Graves | Rowing | 2012 Summer | |
| Robert Graves | Great Britain | Art competitions | 1924 Summer | |
| Ans Gravesteijn | Netherlands | Rowing | 1976 Summer | |
| Cees Gravesteijn | Canoe sprint | 1948 Summer | |
| Bernard Gravier | France | Fencing | 1908 Summer | |
| Ernest Gravier | Football | 1924 Summer | |
| Louis du Douet de Graville [ Wikidata ] | Equestrian driving | 1900 Summer | |
| Benedetto Gravina | Italy | Boxing | 1980 Summer | |
| Cristina Gravina | Alpine skiing | 1980 Winter | |
| Pasquale Gravina | Volleyball | 1996 Summer, 2000 Summer | |
| Adeline Gray | United States | Wrestling | 2016 Summer, 2020 Summer | |
| Allisha Gray | 3x3 basketball | 2020 Summer | |
| Bob Gray | Cross country skiing | 1968 Winter, 1972 Winter | |
| Brownlow Gray | Bermuda | Sailing | 1960 Summer | |
| Cameron Gray | New Zealand | Swimming | 2024 Summer | |
| Cassidy Gray | Canada | Alpine skiing | 2022 Winter | |
| Chelsea Gray | United States | Basketball | 2020 Summer, 2024 Summer | |
| Clifford Gray | Bobsleigh | 1928 Winter, 1932 Winter | |
| Davey Gray | Ireland | Rowing | 1980 Summer | |
| Dunc Gray | Australia | Track cycling | 1928 Summer, 1932 Summer, 1936 Summer | |
| Eddie Grey | Sri Lanka | Boxing | 1948 Summer | |
| Elaine Gray | Great Britain | Swimming | 1976 Summer | |
| George Gray | Athletics | 1920 Summer | |
| Gerry Gray | Canada | Football | 1984 Summer | |
| Gilbert Gray | United States | Sailing | 1932 Summer | |
| Helen Gray | Australia | Swimming | 1972 Summer | |
| Ian Gray | Belize | Athletics | 1988 Summer, 1992 Summer | |
| John Gray | United States | 1924 Summer | |
| John Gray | Philippines | Boxing | 1932 Summer | |
| Johnny Gray | United States | Athletics | 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer | |
| Ken Gray | Jamaica | 1984 Summer | |
| Lauren Gray | Great Britain | Curling | 2018 Winter | |
| Lendon Gray | United States | Equestrian dressage | 1988 Summer | |
| Mark Gray | Australia | Cross country skiing | 1994 Winter | |
| Matthew Gray | Archery | 1996 Summer, 2000 Summer, 2008 Summer | |
| Nelson Gray | United States | Athletics | 1932 Summer | |
| Paul Gray | Australia | Cross country skiing | 1992 Winter, 1998 Winter | |
| Pauline Gray | Swimming | 1968 Summer | |
| Peter Gray | Ireland | Sailing | 1960 Summer | |
| Peter S. Gray | Bermuda | Equestrian eventing | 1984 Summer, 1988 Summer | |
| Robert Gray | Canada | Athletics | 1984 Summer | |
| Ronald Gray | Great Britain | Art competitions | 1932 Summer | |
| Ronald Gray | Australia | Athletics | 1956 Summer | |
| Sarah Gray | New Zealand | Rowing | 2012 Summer | |
| Simon Gray | Great Britain | Swimming | 1980 Summer | |
| Sonya Gray | Australia | 1976 Summer | |
| Thomas Gray | Canada | Rowing | 1964 Summer | |
| Tom Gray | United States | Speed skating | 1964 Winter, 1968 Winter | |
| Tyson Gray | Jamaica | Boxing | 1996 Summer | |
| Jeff Grayer | United States | Basketball | 1988 Summer | |
| Matthew Grayling | New Zealand | Equestrian eventing | 2004 Summer | |
| James Grayman | Antigua and Barbuda | Athletics | 2008 Summer | |
| Davide Graz | Italy | Cross country skiing | 2022 Winter | |
| Eugene Grazia | United States | Ice hockey | 1960 Winter | |
| Zohra Graziani-Koullou | France | Athletics | 1992 Summer | |
| Matteo Graziano | Argentina | Rugby sevens | 2024 Summer | |
| Grazielle | Brazil | Football | 2004 Summer, 2012 Summer | |
| Dominic Grazioli | United States | Shooting | 2008 Summer | |
| Rodolfo Grazzini | Argentina | Equestrian eventing | 1976 Summer | |
| Janez Grbelja | Yugoslavia | Rowing | 1972 Summer | |
| Itana Grbić | Montenegro | Handball | 2020 Summer | |
| Nikola Grbić | Yugoslavia | Wrestling | 1924 Summer | |
| Nikola Grbić | Serbia and Montenegro, Serbia | Volleyball | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer | |
| Vladimir Grbić | Serbia and Montenegro | 1996 Summer, 2000 Summer, 2004 Summer | |
| Aleksandar Grbović [ Wikidata ] | Montenegro | Cross country skiing | 2022 Winter | |
| Ed Greathouse | United States | Boxing | 1924 Summer | |
| Alexander Greaux | Puerto Rico | Athletics | 2004 Summer | |
| Kyle Greaux | Trinidad and Tobago | 2016 Summer, 2020 Summer | |
| Damien Greaves | Great Britain | 2000 Summer | |
| Sandra Greaves | Canada | Judo | 1992 Summer | |
| Wilbert Greaves | Great Britain | Athletics | 1980 Summer, 1984 Summer | |
| Guy Greavette | Canada | Weightlifting | 1988 Summer | |
| Ilie Greavu | Romania | Football | 1964 Summer | |
| William Grebe | United States | Fencing | 1904 Summer | |
| Barbara von Grebel-Schiendorfer | Switzerland | Equestrian dressage | 1996 Summer | |
| Anastasia Grebenkina | Armenia | Figure skating | 2006 Winter | |
| Georgy Grebenkov | Russia | Artistic gymnastics | 2004 Summer | |
| Jenia Grebennikov | France | Volleyball | 2016 Summer, 2020 Summer, 2024 Summer | |
| Vladimir Grebennikov | Soviet Union | Ice hockey | 1960 Winter | |
| Alla Grebennikova | Swimming | 1968 Summer | |
| Aleksandr Grebenyuk | Athletics | 1976 Summer | |
| Christian Greber | Austria | Alpine skiing | 2002 Winter | |
| Henri-Léon Gréber | France | Art competitions | 1924 Summer | |
| Denis Grebeshkov | Russia | Ice hockey | 2010 Winter | |
| Mathieu Grébille | France | Handball | 2016 Summer | |
| Oleg Grebnev | Unified Team, Russia | 1992 Summer, 1996 Summer | |
| Shana Grebo | France | Athletics | 2024 Summer | |
| Constantin Grecescu | Romania | 1960 Summer, 1964 Summer | |
| Florica Grecescu | 1960 Summer | |
| Joseph Grech | Malta | Shooting | 1960 Summer, 1968 Summer, 1972 Summer | |
| Laurent Grech [ Wikidata ] | France | Artistic gymnastics | 1920 Summer | |
| Andrey Grechin | Russia | Swimming | 2008 Summer, 2012 Summer, 2016 Summer | |
| Yelizaveta Grechishnikova | Athletics | 2012 Summer | |
| Olena Grechykhina | Ukraine | Artistic swimming | 2016 Summer | |
| Daniele Greco | Italy | Athletics | 2012 Summer | |
| Emilio Greco | Art competitions | 1948 Summer | |
| Sebastiano Greco | Volleyball | 1980 Summer | |
| Andreea Grecu | Romania | Bobsleigh | 2014 Winter, 2018 Winter, 2022 Winter | |
| Dan Grecu | Artistic gymnastics | 1972 Summer, 1976 Summer, 1980 Summer | |
| Brandan Greczkowski | United States | Judo | 2000 Summer | |
| Claude Greder | France | Water polo | 1960 Summer | |
| Ludwig Gredler | Austria | Biathlon | 1992 Winter, 1994 Winter, 1998 Winter, 2002 Winter, 2006 Winter | |
| Daria Gredzen [ Wikidata ] | Russian Olympic Committee | Ice hockey | 2022 Winter | |
| Stanisław Grędziński | Poland | Athletics | 1968 Summer | |
| Jan-Cor van der Greef | Netherlands | Shooting | 2004 Summer | |
| Jannie Greeff | South Africa | Weightlifting | 1956 Summer | |
| Jean Greeff | 2012 Summer | |
| Ally Green | New Zealand | Football | 2024 Summer | |
| Anna Green | 2008 Summer, 2020 Summer | |
| Art Green | Great Britain | Ice hockey | 1948 Winter | |
| Bill Green | United States | Athletics | 1984 Summer | |
| Billy Green | Great Britain | 1928 Summer | |
| Brendan Green | Canada | Biathlon | 2010 Winter, 2014 Winter, 2018 Winter | |
| Brian Green | Great Britain | Athletics | 1972 Summer | |
| Carl Green | Sweden | Equestrian vaulting | 1920 Summer | |
| Carolyn Green | United States | Swimming | 1952 Summer | |
| Chad Green | Baseball | 1996 Summer | |
| Charles Patrick Green | Great Britain | Bobsleigh | 1936 Winter | |
| Charles Green | Australia | Athletics | 1948 Summer | |
| Craig Green | Wrestling | 1984 Summer | |
| Cynthia Green | Jamaica | Athletics | 1984 Summer | |
| Danny Green | Australia | Boxing | 2000 Summer | |
| David Green | Equestrian eventing | 1988 Summer, 1992 Summer, 1996 Summer | |
| Dennis Green | Canoe sprint | 1956 Summer, 1960 Summer, 1964 Summer, 1968 Summer, 1972 Summer | |
| Draymond Green | United States | Basketball | 2016 Summer, 2020 Summer | |
| Ellia Green | Australia | Rugby sevens | 2016 Summer | |
| Emma Green | Sweden | Athletics | 2008 Summer, 2012 Summer | |
| Eric Green | Great Britain | Field hockey | 1908 Summer | |
| Erica Green | South Africa | Road cycling, Cycling mountain bike | 1996 Summer, 2000 Summer | |
| Frankie Green | Great Britain | Ice hockey | 1948 Winter | |
| Franklin Green | United States | Shooting | 1964 Summer | |
| Gavin Green | Malaysia | Golf | 2016 Summer, 2020 Summer, 2024 Summer | |
| Hannah Green | Australia | 2020 Summer, 2024 Summer | |
| Harry Green | Great Britain | Athletics | 1912 Summer | |
| Hilary Green | Figure skating | 1976 Winter | |
| Jack Green | Athletics | 2012 Summer, 2016 Summer | |
| Jake Green | South Africa | Rowing | 2016 Summer, 2020 Summer | |
| James Green [ Wikidata ] | United States | Swimming | 1908 Summer | |
| Jannick Green | Denmark | Handball | 2016 Summer | |
| Joseph Green | Guam | Athletics | 2024 Summer | |
| Josh Green | Australia | Basketball | 2020 Summer, 2024 Summer | |
| Julian Green | Great Britain | Speed skating | 1988 Winter | |
| June Green | Swimming | 1972 Summer | |
| Leford Green | Jamaica | Athletics | 2012 Summer | |
| Lucinda Green | Great Britain | Equestrian eventing | 1976 Summer, 1984 Summer | |
| Mary Green | Athletics | 1968 Summer | |
| Michael Green | Barbados, Saint Lucia | Sailing | 1988 Summer, 1996 Summer | |
| Michael Green | Great Britain | Swimming | 1988 Summer | |
| Michael Green | Jamaica | Athletics | 1992 Summer, 1996 Summer | |
| Michael Green | Germany | Field hockey | 1996 Summer, 2000 Summer | |
| Nick Green | Australia | Rowing | 1992 Summer, 1996 Summer | |
| Paul Green | Great Britain | Taekwondo | 2004 Summer | |
| Peter Green | Canada | Rowing | 1948 Summer | |
| Roger Green | Sailing | 1968 Summer | |
| Roland Green | Cycling mountain bike | 2000 Summer | |
| Ross Green | Great Britain | Alpine skiing | 2002 Winter | |
| Sienna Green | Australia | Water polo | 2024 Summer | |
| Steve Green | Canada | Baseball | 2008 Summer | |
| Stewart Green | Sailing | 1968 Summer | |
| Sue Green | Great Britain | Fencing | 1968 Summer, 1972 Summer, 1976 Summer | |
| Thomas Green | Australia | Canoe sprint | 2020 Summer, 2024 Summer | |
| Tommy Green | Great Britain | Athletics | 1932 Summer | |
| Calvin Greenaway | Antigua and Barbuda | 1976 Summer | |
| Dean Greenaway | British Virgin Islands | 1984 Summer | |
| Kelly Greenbank | Austria | Ice hockey | 1984 Winter, 1988 Winter | |
| Luke Greenbank | Great Britain | Swimming | 2020 Summer, 2024 Summer | |
| Dan Greenbaum | United States | Volleyball | 1992 Summer | |
| Richard Greenberg | Water polo | 1928 Summer | |
| Nancy Greene Raine | Canada | Alpine skiing | 1960 Winter, 1964 Winter, 1968 Winter | |
| Alan Greene | United States | Diving | 1936 Summer | |
| Alice Greene | Great Britain | Tennis | 1908 Summer | |
| Cejhae Greene | Antigua and Barbuda | Athletics | 2016 Summer, 2020 Summer, 2024 Summer | |
| Charles Greene | United States | 1968 Summer | |
| Cillin Greene | Ireland | 2020 Summer | |
| Dai Greene | Great Britain | 2012 Summer | |
| Darragh Greene | Ireland | Swimming | 2020 Summer, 2024 Summer | |
| Debbie Greene | Bahamas | Athletics | 1984 Summer | |
| Demond Greene | Germany | Basketball | 2008 Summer | |
| Edward Greene | United States | Shooting | 1908 Summer | |
| Elizabeth Greene | Canada | Alpine skiing | 1960 Winter | |
| Hazel Greene | Ireland | Archery | 1980 Summer, 1984 Summer, 1988 Summer | |
| Joe Greene | United States | Athletics | 1992 Summer, 1996 Summer | |
| Kennice Aphenie Greene [ Wikidata ] | Saint Vincent and the Grenadines | Swimming | 2024 Summer | |
| Maurice Greene | United States | Athletics | 2000 Summer, 2004 Summer | |
| Orlando Greene | Barbados | 1976 Summer | |
| Pam Greene | United States | 1972 Summer | |
| Paul Greene | Australia | 1996 Summer | |
| Philip Greene | Ireland | Art competitions | 1948 Summer | |
| Rick Greene | United States | Baseball | 1992 Summer | |
| Anthony Greenfield | Great Britain | Shooting | 1976 Summer | |
| George Greenfield | United States | Artistic gymnastics | 1972 Summer | |
| Abe Greenhalgh [ Wikidata ] | Great Britain | Weightlifting | 1948 Summer | |
| Fiona Greenham | Field hockey | 2000 Summer | |
| Grant Greenham | Australia | Archery | 1992 Summer | |
| Dorothy Greenhough-Smith | Great Britain | Figure skating | 1908 Summer | |
| Ricardo Greenidge | Canada | Bobsleigh | 1998 Winter | |
| Bunty Greenland | Great Britain | Alpine skiing | 1948 Winter | |
| Gillian de Greenlaw | Australia | Swimming | 1964 Summer | |
| Julia Greenshields | Canada | Rugby sevens | 2020 Summer | |
| Joel Greenshields | Swimming | 2008 Summer | |
| Ella Greenslade | New Zealand | Rowing | 2020 Summer | |
| Debbie Green-Vargas | United States | Volleyball | 1984 Summer | |
| Joe Greenwald | Equestrian jumping | 1920 Summer | |
| Mark Greenwald | Speed skating | 1988 Winter, 1992 Winter | |
| Jordan Greenway | Ice hockey | 2018 Winter | |
| Tom Greenway | Canada | Judo | 1976 Summer | |
| Craig Greenwood | New Zealand | Sailing | 1992 Summer | |
| Eric Greenwood | Costa Rica | Swimming | 1988 Summer | |
| Harold Greenwood | Great Britain | Ice hockey | 1928 Winter | |
| Jeff Greenwood | United States | Snowboarding | 2002 Winter | |
| Michael Greenwood | Great Britain | Football | 1960 Summer | |
| Nimrod Greenwood | Australia | Rowing | 1952 Summer | |
| Sean Greenwood | Ireland | Skeleton | 2014 Winter | |
| Breaux Greer | United States | Athletics | 2000 Summer, 2004 Summer, 2008 Summer | |
| Frank Greer | Rowing | 1904 Summer | |
| Henry Greer | Field hockey | 1932 Summer | |
| Marjolijn Greeve | Netherlands | Equestrian dressage | 1976 Summer | |
| Mette Gregaard | Denmark | Diving | 1936 Summer | |
| Harry Gregersen | Rowing | 1928 Summer, 1936 Summer | |
| Brian Gregg | United States | Cross country skiing | 2014 Winter | |
| Duncan Gregg | Rowing | 1932 Summer | |
| Jamie Gregg | Canada | Speed skating | 2010 Winter, 2014 Winter | |
| Jessica Gregg | Short track speed skating | 2010 Winter | |
| Randy Gregg | Ice hockey | 1980 Winter, 1988 Winter | |
| Richard Gregg | Great Britain | Field hockey | 1908 Summer | |
| Robert Gregg | United States | 1984 Summer | |
| Steve Gregg | Swimming | 1976 Summer | |
| Terry Gregg | Great Britain | Field hockey | 1972 Summer | |
| William Greggan | Tug of war | 1908 Summer | |
| Yahia Gregni | Libya | Judo | 1992 Summer | |
| Antun Grego | Yugoslavia | Sailing | 1968 Summer, 1972 Summer | |
| Bojan Grego | Croatia | 1992 Summer | |
| Melania Grego | Italy | Water polo | 2004 Summer | |
| Jacques Grégoire | France | Boxing | 1920 Summer | |
| Johann Grégoire | Freestyle skiing | 2002 Winter | |
| Oscar Grégoire | Belgium | Water polo, Swimming | 1900 Summer, 1908 Summer, 1912 Summer | |
| Andreas Gregor | East Germany | Rowing | 1980 Summer | |
| František Gregor | Czechoslovakia | Ice hockey | 1964 Winter | |
| Horst-Günter Gregor | Germany, East Germany | Swimming | 1964 Summer, 1968 Summer | |
| Pascal Gregor | Denmark | Football | 2016 Summer | |
| Blaž Gregorc | Slovenia | Ice hockey | 2014 Winter, 2018 Winter | |
| John Gregorek | United States | Athletics | 1984 Summer | |
| Daniel Grégorich | Cuba | Wrestling | 2020 Summer | |
| Teja Gregorin | Slovenia | Cross country skiing, Biathlon | 2002 Winter, 2006 Winter, 2010 Winter, 2014 Winter | |
| Silvia Gregorini | Italy | Rhythmic gymnastics | 2000 Summer | |
| Jadel Gregório | Brazil | Athletics | 2004 Summer, 2008 Summer | |
| José António Gregório | Portugal | Wrestling | 1960 Summer | |
| Mariza Gregorio | Mozambique | Swimming | 1992 Summer | |
| Mateus Gregório | Brazil | Weightlifting | 2016 Summer | |
| Rossella Gregorio | Italy | Fencing | 2016 Summer, 2020 Summer | |
| Marilia Gregoriou | Cyprus | Athletics | 2004 Summer | |
| Sarah Gregorius | New Zealand | Football | 2012 Summer, 2016 Summer | |
| Alison Gregorka | United States | Water polo | 2008 Summer | |
| Boris Gregorka | Yugoslavia | Artistic gymnastics | 1928 Summer, 1936 Summer | |
| Alex Gregory | Great Britain | Rowing | 2012 Summer, 2016 Summer | |
| Elvis Gregory | Cuba | Fencing | 1992 Summer, 1996 Summer, 2000 Summer | |
| F. L. Gregory [ Wikidata ] | United States | Art competitions | 1936 Summer | |
| Jane Gregory | Great Britain | Equestrian dressage | 1996 Summer, 2008 Summer | |
| Jack Gregory | Athletics | 1948 Summer, 1952 Summer | |
| Leon Gregory | Australia | 1956 Summer | |
| Lou Gregory | United States | 1932 Summer | |
| Melissa Gregory | Figure skating | 2006 Winter | |
| Richard Gregory [ Wikidata ] | Canada | Rowing | 1912 Summer | |
| Scott Gregory | United States | Figure skating | 1984 Winter, 1988 Winter | |
| Alan Gregov | Croatia | Basketball | 1992 Summer | |
| Genevieve Gregson | Australia | Athletics | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Ryan Gregson | 2012 Summer, 2016 Summer | |
| Matija Gregurić | Croatia | 2024 Summer | |
| Amon Ritter von Gregurich | Hungary | Fencing | 1900 Summer | |
| Lukas Greiderer | Austria | Nordic combined | 2022 Winter | |
| Daniel Greig | Australia | Speed skating | 2014 Winter, 2018 Winter | |
| Keiller Greig | Great Britain | Figure skating | 1908 Summer | |
| Marion Greig | United States | Rowing | 1976 Summer | |
| Mitchey Greig | New Zealand | Freestyle skiing | 2010 Winter | |
| Tony Greig | Wrestling | 1964 Summer | |
| Thomas Greilinger | Germany | Ice hockey | 2010 Winter | |
| Sonja Greinacher | 3x3 basketball | 2024 Summer | |
| Cindy Greiner | United States | Athletics | 1984 Summer, 1988 Summer, 1992 Summer | |
| Janine Greiner | Switzerland | Curling | 2010 Winter, 2014 Winter | |
| Rebecca Greiner | Australia | Field hockey | 2024 Summer | |
| Robin Greiner | United States | Figure skating | 1956 Winter | |
| Thomas Greiner | East Germany | Rowing | 1988 Summer | |
| Simone Greiner-Petter-Memm | East Germany, Germany | Cross country skiing, Biathlon | 1988 Winter, 1994 Winter | |
| Frank Greinert | United States | Football | 1936 Summer | |
| Klaus Greinert | Germany, West Germany | Field hockey | 1960 Summer, 1968 Summer | |
| André Greipel | Germany | Road cycling | 2012 Summer | |
| Michael Greis | Biathlon | 2002 Winter, 2006 Winter, 2010 Winter | |
| Seth Greisinger | United States | Baseball | 1996 Summer | |
| Thomas Greiss | Germany | Ice hockey | 2006 Winter, 2010 Winter | |
| Pia Greiten | Rowing | 2024 Summer | |
| Valentyn Grekov | Ukraine | Judo | 2004 Summer, 2008 Summer | |
| Vince Grella | Australia | Football | 2000 Summer | |
| Diane Le Grelle [ Wikidata ] | Great Britain | Shooting | 1992 Summer | |
| Jim Grelle | United States | Athletics | 1960 Summer | |
| Sam Greller | Water polo | 1928 Summer | |
| Mathilde Gremaud | Switzerland | Freestyle skiing | 2018 Winter, 2022 Winter | |
| Olivier Gremaud | Rowing | 2004 Summer | |
| János Greminger | Hungary | Basketball | 1952 Summer, 1960 Summer, 1964 Summer | |
| Gotfryd Gremlowski | Poland | Swimming | 1952 Summer | |
| Angeliki Gremou | Greece | Rowing | 1996 Summer, 2000 Summer | |
| Gunnar Gren | Sweden | Football | 1948 Summer | |
| Eileen Grench | Panama | Fencing | 2016 Summer | |
| Michael Grenda | Australia | Track cycling | 1984 Summer | |
| Jeanne Grendel | Netherlands | Swimming | 1928 Summer | |
| Armand Grenet [ Wikidata ] | France | Rugby | 1920 Summer | |
| Florian Grengbo | Track cycling | 2020 Summer, 2024 Summer | |
| Natalie Grenier | Canada | Speed skating | 1984 Winter, 1988 Winter | |
| Valérie Grenier | Alpine skiing | 2018 Winter, 2022 Winter | |
| Stig-Olof Grenner | Finland | Swimming | 1960 Summer | |
| Jean-Marie Grenot | France | Boxing | 1948 Summer | |
| Libania Grenot | Italy | Athletics | 2008 Summer, 2012 Summer, 2016 Summer | |
| Hans Magnus Grepperud | Norway | Rowing | 1984 Summer | |
| Milena Greppi | Italy | Athletics | 1952 Summer, 1956 Summer | |
| Jean-Pierre Grès | France | 1972 Summer | |
| Jenna Gresdal | Canada | Swimming | 2000 Summer | |
| Zackary Gresham [ Wikidata ] | Grenada | 2024 Summer | |
| Hermann Greß | West Germany | Rowing | 1984 Summer | |
| Jimmy Gressier | France | Athletics | 2020 Summer, 2024 Summer | |
| Louis Gressier | Rowing | 1924 Summer | |
| Raoul Gressier | Football | 1908 Summer | |
| Charles El-Gressy | Morocco | Fencing | 1960 Summer | |
| Aksel Gresvig | Norway | Sailing | 1972 Summer | |
| Dave Greszczyszyn | Canada | Skeleton | 2018 Winter | |
| Jerzy Greszkiewicz | Poland | Shooting | 1976 Summer, 1980 Summer, 1988 Summer | |
| Eugenio Gret | Argentina | Track cycling | 1924 Summer | |
| Evdokia Gretchichnikova | Russia | Modern pentathlon | 2008 Summer, 2012 Summer | |
| Johan Greter | Netherlands | Equestrian jumping | 1936 Summer | |
| Otto Greter | Switzerland | Fencing | 1948 Summer, 1952 Summer | |
| Charles Grethen | Luxembourg | Athletics | 2016 Summer, 2020 Summer | |
| Edouard Grethen | Artistic gymnastics | 1928 Summer | |
| Maurice Grether | France | Bobsleigh | 1968 Winter | |
| Nicole Grether | Germany | Badminton | 2000 Summer, 2004 Summer | |
| Émile Gretsch | Luxembourg | Fencing | 1948 Summer, 1952 Summer, 1956 Summer | |
| John Gretton, 1st Baron Gretton | Great Britain | Sailing | 1900 Summer | |
| Maria Gretzer | Sweden | Equestrian jumping | 1992 Summer, 1996 Summer, 2000 Summer | |
| Wayne Gretzky | Canada | Ice hockey | 1998 Winter | |
| Jamie Greubel | United States | Bobsleigh | 2014 Winter, 2018 Winter | |
| Marcelo Greuel | Brazil | Track cycling | 1984 Summer | |
| Bernhard Greulich | Germany | Athletics | 1936 Summer | |
| Edwin Greutmann | Switzerland | Artistic gymnastics | 1968 Summer, 1972 Summer | |
| Sydney Greve | Pakistan | Boxing | 1948 Summer, 1952 Summer | |
| Willem Greve | Netherlands | Equestrian jumping | 2020 Summer | |
| Ernst Greven | Athletics | 1908 Summer | |
| Matt Grevers | United States | Swimming | 2008 Summer, 2012 Summer | |
| Katie Greves | Great Britain | Rowing | 2008 Summer, 2012 Summer, 2016 Summer | |
| Kent Greves | Canada | Volleyball | 1992 Summer | |
| Julia Greville | Australia | Swimming | 1996 Summer | |
| Alexi Grewal | United States | Road cycling | 1984 Summer | |
| Gurcharan Singh Grewal | India | Field hockey | 1936 Summer | |
| Harnam Singh Grewal | Hong Kong | 1964 Summer | |
| Iqbaljit Singh Grewal | India | 1984 Summer | |
| George Grey | Canada | Cross country skiing | 2006 Winter, 2010 Winter | |
| Robyn Grey-Gardner | Australia | Rowing | 1984 Summer | |
| Benjamín Grez | Chile | Sailing | 2012 Summer, 2016 Summer | |
| Cristóbal Grez | 2016 Summer | |
| Javiera Grez | Football | 2020 Summer | |
| Dimitrije Grgić | Serbia | Shooting | 2016 Summer | |
| Filip Grgić | Croatia | Taekwondo | 2016 Summer | |
| Marko Grgić | Germany | Handball | 2024 Summer | |
| Denis Gribanov | Russia, Russian Olympic Committee | Sailing | 2016 Summer, 2020 Summer | |
| Matt Gribble | United States | Swimming | 1984 Summer | |
| Irina Gribko | Unified Team | Rowing | 1992 Summer | |
| Ilze Gribule | Latvia | Athletics | 2004 Summer | |
| Mihail Gribuşencov | Moldova | Biathlon | 2002 Winter, 2006 Winter | |
| Charlie Grice | Great Britain | Athletics | 2016 Summer | |
| Thomas Grice | Australia | Shooting | 2020 Summer | |
| Damian Grichting | Switzerland | Curling | 2002 Winter | |
| Oleksandra Gridasova | Ukraine | Rhythmic gymnastics | 2016 Summer | |
| Andrey Gridin | Bulgaria | Cross country skiing | 2014 Winter | |
| Alina Gridneva | Russian Olympic Committee | Freestyle skiing | 2018 Winter | |
| John Grieb | United States | Athletics, Artistic gymnastics | 1904 Summer | |
| Walter Grieb | Switzerland | Boxing | 1936 Summer | |
| Sophia Griebel | Germany | Skeleton | 2014 Winter | |
| William Griebenow | United States | Volleyball | 1964 Summer | |
| Alan Grieco | Track cycling | 1964 Summer | |
| Hans Grieder | Switzerland | Artistic gymnastics | 1924 Summer, 1928 Summer | |
| Tallon Griekspoor | Netherlands | Tennis | 2024 Summer | |
| Edwin Grienauer | Austria | Art competitions | 1928 Summer, 1932 Summer, 1948 Summer | |
| John Grier | United States | Shooting | 1924 Summer | |
| Gertrude Gries | Austria | Artistic gymnastics | 1948 Summer, 1952 Summer | |
| Joachim Griese | West Germany | Sailing | 1984 Summer | |
| Angelika Grieser | Swimming | 1976 Summer | |
| Manfred Grieser | Germany | Athletics | 1960 Summer | |
| Manfred Grieshofer | Austria | Rowing | 1972 Summer | |
| Werner Grieshofer | 1972 Summer | |
| Fritz Griesser | Switzerland | Athletics | 1952 Summer | |
| Thomas Griesser | Austria | 1996 Summer | |
| Joy Grieveson | Great Britain | 1964 Summer | |
| Arthur Griez von Ronse | Austria | Fencing | 1912 Summer | |
| David Griff | Australia | Alpine skiing | 1976 Winter | |
| Preston Griffall | United States | Luge | 2006 Winter, 2014 Winter | |
| Alfred Griffin | Great Britain | Weightlifting | 1936 Summer | |
| Benjamin Griffin | New Zealand | Alpine skiing | 2010 Winter | |
| Colin Griffin | Ireland | Athletics | 2008 Summer, 2012 Summer | |
| David Griffin | Canada | 1928 Summer | |
| Eric Griffin | United States | Boxing | 1992 Summer | |
| Gary Griffin | Guam | Sailing | 1988 Summer | |
| John Griffin | Canada | Alpine skiing | 1952 Winter | |
| Kelly Griffin | United States | Rugby sevens | 2016 Summer | |
| Kenny Griffin | Artistic gymnastics | 1936 Summer | |
| Kimani Griffin | Speed skating | 2018 Winter | |
| Lorna Griffin | Athletics | 1984 Summer | |
| Mia Griffin | Ireland | Track cycling | 2024 Summer | |
| Montell Griffin | United States | Boxing | 1992 Summer | |
| Niall Griffin | Ireland | Equestrian eventing | 2004 Summer, 2008 Summer | |
| Paul Griffin | Boxing | 1992 Summer | |
| Paul Griffin | Rowing | 2004 Summer, 2008 Summer | |
| Randi Griffin | Korea Team | Ice hockey | 2018 Winter | |
| Richard Griffin | Virgin Islands | Sailing | 1972 Summer | |
| Tom Griffin | Australasia | Rugby | 1908 Summer | |
| Tom Griffin | Great Britain | Boxing | 1936 Summer | |
| Winifred Griffin | New Zealand | Swimming | 1956 Summer | |
| Stu Griffing | United States | Rowing | 1948 Summer | |
| Adrian Griffith | Bahamas | Athletics | 2016 Summer | |
| Agnes Griffith | Grenada | 1988 Summer | |
| Charles Griffith | Venezuela | Judo | 1988 Summer | |
| David Griffith | Great Britain | Bobsleigh | 1928 Winter | |
| Georgia Griffith | Australia | Athletics | 2020 Summer, 2024 Summer | |
| Gregory Griffith | Barbados | Boxing | 1988 Summer | |
| June Griffith | Guyana | Athletics | 1984 Summer | |
| Steven Griffith | United States | Ice hockey | 1984 Winter | |
| William Griffith | Canada | Canoe slalom | 1972 Summer | |
| Xiomara Griffith | Venezuela | Judo | 1992 Summer, 1996 Summer, 2000 Summer | |
| Yolanda Griffith | United States | Basketball | 2000 Summer, 2004 Summer | |
| Michelle Griffith-Robinson | Great Britain | Athletics | 1996 Summer | |
| Andrew Griffiths | Canada | Field hockey | 2000 Summer | |
| Art Griffiths | Rowing | 1948 Summer, 1952 Summer | |
| Arthur Griffiths | Great Britain | Road cycling | 1912 Summer | |
| Barry Griffiths | New Zealand | Table tennis | 1988 Summer | |
| Cecil Griffiths | Great Britain | Athletics | 1920 Summer | |
| Chris Griffiths | Field hockey | 2020 Summer | |
| Dave Griffiths | Boxing | 1984 Summer | |
| David Griffiths | Shooting | 1912 Summer | |
| Dean Griffiths | Jamaica | Athletics | 2004 Summer | |
| Gwen Griffiths | South Africa | 1996 Summer | |
| Katia Griffiths | Spain | Freestyle skiing | 2014 Winter | |
| Phil Griffiths | Great Britain | Road cycling | 1976 Summer | |
| Philip Griffiths | Shooting | 1924 Summer | |
| Ryan Griffiths | Australia | Football | 2004 Summer | |
| Sam Griffiths | Equestrian eventing | 2012 Summer, 2016 Summer | |
| Steve Griffiths | Jamaica | Athletics | 1984 Summer | |
| William Griffiths | Great Britain | Field hockey | 1948 Summer | |
| William Griffiths | Australia | Boxing | 1956 Summer | |
| Marcel Grifnée | Belgium | Road cycling | 1968 Summer | |
| Evert Grift | Netherlands | 1948 Summer | |
| Henk van der Grift | Speed skating | 1960 Winter | |
| Larisa Griga | Ukraine | Badminton | 2008 Summer, 2012 Summer | |
| Tato Grigalashvili | Georgia | Judo | 2020 Summer, 2024 Summer | |
| Darius Grigalionis | Lithuania | Swimming | 1996 Summer, 2000 Summer, 2004 Summer | |
| Oto Grigalka | Soviet Union | Athletics | 1952 Summer, 1956 Summer | |
| Jakub Grigar | Slovakia | Canoe slalom | 2016 Summer, 2020 Summer, 2024 Summer | |
| Apolinaras Grigas | Soviet Union | Rowing | 1968 Summer | |
| Martha Griggs | Canada | Equestrian eventing | 1984 Summer | |
| Roberto Grigis | Italy | Alpine skiing | 1984 Winter | |
| Giovanni Grignolo | Equestrian eventing | 1960 Summer | |
| Gert Grigoleit | United States | Canoe sprint | 1964 Summer | |
| Nicola Grigolo [ Wikidata ] | Italy | Beach volleyball | 1996 Summer | |
| Marius Grigonis | Lithuania | Basketball | 2016 Summer | |
| Aristidis Grigorakis | Greece | Wrestling | 1988 Summer | |
| Anca Grigoraș | Romania | Artistic gymnastics | 1972 Summer, 1976 Summer | |
| Cristina Grigoraș | Rowing | 2012 Summer | |
| Cristina Elena Grigoraș | Artistic gymnastics | 1980 Summer, 1984 Summer | |
| Ioan Grigoraș | Wrestling | 1992 Summer | |
| Andreea Grigore | Artistic gymnastics | 2008 Summer | |
| Daniel Grigore | Fencing | 1992 Summer | |
| Dorin Alexandru Grigore | Bobsleigh | 2018 Winter | |
| Ricardo Grigore | Football | 2020 Summer | |
| Sorina Grigore | Luge | 1994 Winter | |
| Mikhail Grigorenko | Russian Olympic Committee | Ice hockey | 2018 Winter, 2022 Winter | |
| Tatyana Grigorenko | Belarus | Artistic gymnastics | 2000 Summer | |
| Claudia Grigorescu | Romania | Fencing | 1992 Summer | |
| Vladimir Grigoryev | Ukraine, Russia | Short track speed skating | 2002 Winter, 2006 Winter, 2014 Winter | |
| Kseniya Grigoreva | Uzbekistan | Alpine skiing | 2010 Winter, 2014 Winter | |
| Aristeidis Grigoriadis | Greece | Swimming | 2004 Summer, 2008 Summer, 2012 Summer | |
| Aram Grigorian | United Arab Emirates | Judo | 2024 Summer | |
| Artur Grigorian | Unified Team | Boxing | 1992 Summer | |
| Tatiana Grigorieva | Australia | Athletics | 2000 Summer | |
| Georgios Grigoriou | Greece | 1896 Summer | |
| Anastasija Grigorjeva | Latvia | Wrestling | 2012 Summer, 2016 Summer, 2020 Summer | |
| Stanislav Grigorov | Bulgaria | 1992 Summer | |
| Mariya Grigorova | Kazakhstan | Alpine skiing | 2018 Winter | |
| Rayna Grigorova | Bulgaria | Artistic gymnastics | 1952 Summer, 1960 Summer, 1964 Summer | |
| Mihai Grigorovici | Romania | Volleyball | 1964 Summer | |
| Yury Grigorovsky | Soviet Union | Water polo | 1960 Summer, 1968 Summer | |
| Aghvan Grigoryan | Armenia | Weightlifting | 1996 Summer | |
| Kirill Grigoryan | Russia | Shooting | 2016 Summer | |
| Aleksandr Grigoryev | Soviet Union | Athletics | 1980 Summer | |
| Leonid Grigoryev | 1952 Summer | |
| Oleg Grigoryev | Boxing | 1960 Summer, 1964 Summer | |
| Sergey Grigoryev | Athletics | 1968 Summer, 1972 Summer | |
| Vyacheslav Grigoryev | Unified Team, Kazakhstan | Fencing | 1992 Summer, 1996 Summer | |
| Lidiya Grigoryeva | Russia | Athletics | 2000 Summer, 2004 Summer | |
| Marina Grigoryeva | Shooting | 1996 Summer | |
| Nataliya Grigoryeva | Unified Team | Rowing | 1992 Summer | |
| Yekaterina Grigoryeva | Russia | Athletics | 1996 Summer | |
| Yelena Grigoryeva | Belarus | Figure skating | 1994 Winter | |
| Antoniya Grigorova | Bulgaria | Cross country skiing | 2010 Winter, 2014 Winter, 2018 Winter | |
| Mary Grigson | Australia | Cycling mountain bike | 1996 Summer, 2000 Summer | |
| Luis Grijalva | Guatemala | Athletics | 2020 Summer, 2024 Summer | |
| Hendrik de Grijff | Netherlands | Shooting | 1924 Summer | |
| Adhemar Grijó Filho | Brazil | Swimming, Water polo | 1952 Summer, 1960 Summer, 1964 Summer | |
| Alina Grijseels | Germany | Handball | 2024 Summer | |
| Jan Grijseels | Netherlands | Athletics | 1912 Summer | |
| Gregor Grilc | Slovenia | Alpine skiing | 1992 Winter, 1994 Winter | |
| Konrad Grilec | Yugoslavia | Artistic gymnastics | 1936 Summer, 1948 Summer | |
| Hildegard Grill | Austria | 1952 Summer | |
| Valentin Grille | Uruguay | Rugby sevens | 2024 Summer | |
| Jade Grillet-Aubert [ Wikidata ] | France | Freestyle skiing | 2022 Winter | |
| Anders Grillhammar | Sweden | Swimming | 1984 Summer | |
| Amedeo Grillo | Italy | Boxing | 1924 Summer | |
| Beppe Grillo [ Wikidata ] | Malta | Athletics | 2024 Summer | |
| Emiliano Grillo | Argentina | Golf | 2016 Summer, 2024 Summer | |
| Gabriela Grillo | West Germany | Equestrian dressage | 1976 Summer | |
| Santiago Grillo | Colombia | Sailing | 2008 Summer, 2012 Summer, 2016 Summer | |
| Luís Grilo | Portugal | Wrestling | 1968 Summer, 1972 Summer, 1976 Summer | |
| Giorgio Grilz | Italy | Swimming | 1952 Summer | |
| Hollie Grima | Australia | Basketball | 2008 Summer | |
| Clémence Grimal | France | Snowboarding | 2014 Winter, 2018 Winter | |
| Christian Grimaldi | Water polo | 1992 Summer | |
| Martina Grimaldi | Italy | Marathon swimming | 2008 Summer, 2012 Summer | |
| Esteban Grimalt | Chile | Beach volleyball | 2016 Summer, 2020 Summer, 2024 Summer | |
| Marco Grimalt | 2016 Summer, 2020 Summer, 2024 Summer | |
| David Grimán | Venezuela | Boxing | 1988 Summer | |
| Chantal Grimard | Belgium | Swimming | 1976 Summer | |
| Ricardo Grimau | Argentina | Shooting | 1948 Summer | |
| Jean-Pierre Grimaud | France | Rowing | 1964 Summer, 1968 Summer | |
| Eric Grimbeek | South Africa | Athletics | 1936 Summer | |
| Vanessa Grimberg | Germany | Swimming | 2016 Summer | |
| Maarten van Grimbergen | Netherlands | Field hockey | 1984 Summer, 1992 Summer | |
| Petra Grimbergen | Road cycling | 1992 Summer | |
| Lyn Grime | New Zealand | Athletics | 1984 Summer | |
| John Grimek | United States | Weightlifting | 1936 Summer | |
| Betty Grimes | Diving | 1920 Summer | |
| Charles Grimes | Rowing | 1956 Summer | |
| Connor Grimes | Canada | Field hockey | 2008 Summer | |
| Doris Grimes | Great Britain | Diving | 1928 Summer | |
| Hamil Grimes | Barbados | Athletics | 1976 Summer, 1984 Summer | |
| Katie Grimes | United States | Swimming, Marathon swimming | 2020 Summer, 2024 Summer | |
| Martyn Grimley | Great Britain | Field hockey | 1988 Summer | |
| Grimm [ Wikidata ] | France | Artistic gymnastics | 1900 Summer | |
| Alexander Grimm | Germany | Canoe slalom | 2008 Summer | |
| János Grimm | Hungary | Track cycling | 1924 Summer | |
| Oliver Grimm | Switzerland | Artistic gymnastics | 1992 Summer | |
| Vanessa Grimm | Germany | Athletics | 2020 Summer | |
| Torben Grimmel | Denmark | Shooting | 1996 Summer, 2000 Summer, 2004 Summer, 2012 Summer, 2016 Summer | |
| Wilhelm Grimmelmann | Artistic gymnastics | 1912 Summer | |
| Bärbel Grimmer | Germany | Swimming | 1964 Summer | |
| Gerhard Grimmer | East Germany | Cross country skiing | 1968 Winter, 1972 Winter, 1976 Winter | |
| Wayne Grimmer | Canada | Field hockey | 1988 Summer | |
| Geoffrey Grimmett | Great Britain | Fencing | 1976 Summer | |
| Mark Grimmette | United States | Luge | 1994 Winter, 1998 Winter, 2002 Winter, 2006 Winter, 2010 Winter | |
| Bjørn Grimnes | Norway | Athletics | 1972 Summer, 1976 Summer | |
| Félix Grimonprez | France | Field hockey | 1928 Summer, 1936 Summer | |
| Kari Aalvik Grimsbø | Norway | Handball | 2008 Summer, 2012 Summer, 2016 Summer | |
| Stian Grimseth | Weightlifting | 1996 Summer, 2004 Summer | |
| Stuart Grimshaw | New Zealand | Field hockey | 1984 Summer | |
| Anthon Grimsmo | Norway | Curling | 1998 Winter | |
| Valdimar Grímsson | Iceland | Handball | 1992 Summer | |
| Gudmund Grimstad | Norway | Wrestling | 1920 Summer | |
| Anton Grimus | Australia | Freestyle skiing | 2014 Winter, 2018 Winter | |
| Lina Grinčikaitė-Samuolė | Lithuania | Athletics | 2008 Summer, 2012 Summer | |
| Alan Grindal | Australia | Road cycling | 1960 Summer | |
| André Klippenberg Grindheim | Norway | Swimming | 2020 Summer | |
| David Grindley | Great Britain | Athletics | 1992 Summer | |
| Brittney Griner | United States | Basketball | 2016 Summer, 2020 Summer, 2024 Summer | |
| Wendy Griner | Canada | Figure skating | 1960 Winter, 1964 Winter | |
| Leonid Grinev [ Wikidata ] | Russia | Fencing | 1912 Summer | |
| Vladislav Grinev | Russian Olympic Committee | Swimming | 2020 Summer | |
| Anna Grineva | Russia | Water polo | 2016 Summer | |
| Inka Grings | Germany | Football | 2000 Summer | |
| Marlon Grings | Brazil | Canoe slalom | 1992 Summer | |
| Fred Grinham | United States | Track cycling | 1904 Summer | |
| Judy Grinham | Great Britain | Swimming | 1956 Summer | |
| Kjersti Grini | Norway | Handball | 1996 Summer, 2000 Summer | |
| Lars Grini | Ski jumping | 1968 Winter | |
| Theodoros Griniazakis | Greece | Swimming | 1988 Summer | |
| Sergei Grinkov | Soviet Union, Russia | Figure skating | 1988 Winter, 1994 Winter | |
| Matt Grinlaubs | Australia | Beach volleyball | 2000 Summer | |
| Ronald Grinstead | Great Britain | Wrestling | 1968 Summer, 1972 Summer | |
| Anatol Grințescu | Romania | Water polo | 1960 Summer, 1964 Summer | |
| Ragnar Gripe | Sweden | Sailing | 1912 Summer | |
| Carl Gripenstedt | Fencing | 1920 Summer, 1924 Summer | |
| Ebba Gripenstedt | 1928 Summer, 1936 Summer | |
| Phil Grippaldi | United States | Weightlifting | 1968 Summer, 1972 Summer, 1976 Summer | |
| Carlo Grippo | Italy | Athletics | 1976 Summer, 1980 Summer | |
| María Sara Grippoli | Uruguay | Taekwondo | 2024 Summer | |
| Carlos Grisales | Colombia | Athletics | 1992 Summer, 1996 Summer | |
| Gianpaolo Grisandi | Italy | Track cycling | 1988 Summer | |
| Albert Grisar | Belgium | Sailing | 1920 Summer | |
| Alfred Grisar | Polo | 1920 Summer | |
| Robert Grisar | Tennis | 1920 Summer | |
| Adolphe Grisel | France | Athletics, Artistic gymnastics | 1896 Summer | |
| Joanna Grisez | Rugby sevens | 2024 Summer | |
| Nadezhda Grishaeva | Russia | Basketball | 2012 Summer | |
| Boris Grishayev | Soviet Union | Athletics | 1956 Summer | |
| Sergey Grishchenko | Alpine skiing | 1972 Winter | |
| Alla Grishchenkova | Swimming | 1980 Summer | |
| Aleksei Grishin | Belarus | Freestyle skiing | 1998 Winter, 2002 Winter, 2006 Winter, 2010 Winter, 2014 Winter | |
| Anatoli Grishin | Soviet Union | Canoe sprint | 1964 Summer | |
| Boris Grishin | Water polo | 1964 Summer, 1968 Summer | |
| Yevgeny Grishin | Speed skating | 1956 Winter, 1960 Winter, 1964 Winter, 1968 Winter | |
| Yevgeny Grishin | Water polo | 1980 Summer, 1988 Summer | |
| Anastasia Grishina | Russia | Artistic gymnastics | 2012 Summer | |
| Oksana Grishina | Track cycling | 1996 Summer, 2000 Summer | |
| Yelena Grishina | Soviet Union, Unified Team | Fencing | 1988 Summer, 1992 Summer | |
| Oleg Grishkin | Russia | Track cycling | 2004 Summer | |
| Oksana Grishuk | Unified Team, Russia | Figure skating | 1992 Winter, 1994 Winter, 1998 Winter | |
| Alfredo Grisi | Mexico | Fencing | 1948 Summer | |
| Louis Grisius | Luxembourg | Road cycling | 1960 Summer | |
| Evita Griskenas | United States | Rhythmic gymnastics | 2020 Summer, 2024 Summer | |
| Mindaugas Griškonis | Lithuania | Rowing | 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Eugène Grisot | France | Archery | 1908 Summer, 1920 Summer | |
| Werner Grissmann | Austria | Alpine skiing | 1980 Winter | |
| Daniel Gritsch | Ice hockey | 1976 Winter | |
| Marina Gritsenko | Kazakhstan | Water polo | 2004 Summer | |
| Eduard Gritsun | Russia | Track cycling | 1996 Summer, 2000 Summer | |
| Arseni Gritsyuk | Russian Olympic Committee | Ice hockey | 2022 Winter | |
| Lauma Grīva | Latvia | Athletics | 2012 Summer | |
| Louis Grivel | Switzerland | Art competitions | 1928 Summer, 1936 Summer | |
| Philippe Grivel | Track cycling | 1988 Summer | |
| Igor Grivennikov | Soviet Union | Swimming | 1972 Summer | |
| Zakharin Grivev | Bulgaria | Cross country skiing | 1956 Winter | |
| Alfred Grixti | Malta | Swimming | 1960 Summer | |
| Paola Grizzetti | Italy | Rowing | 1984 Summer | |
| Božo Grkinić | Yugoslavia | Water polo | 1948 Summer | |
| Vasile Groapă | Romania | Weightlifting | 1980 Summer, 1984 Summer | |
| Duncan Grob | Chile | Alpine skiing | 2002 Winter, 2006 Winter | |
| Jakob Grob | Switzerland | Rowing | 1968 Summer | |
| Rainer Grob | Chile | Alpine skiing | 1998 Winter | |
| Thomás Grob | 1998 Winter | |
| Christie Grobbelaar | South Africa | Rugby sevens | 2024 Summer | |
| Helen Grobert | Germany | Cycling mountain bike | 2016 Summer | |
| Ernesto Grobet | Mexico | Track cycling | 1932 Summer | |
| Ursula Grobler | South Africa | Rowing | 2016 Summer | |
| Wilfried Gröbner | East Germany | Football | 1976 Summer | |
| Patrick Groc | France | Fencing | 1984 Summer, 1988 Summer, 1992 Summer | |
| Barbara Grocholska | Poland | Alpine skiing | 1952 Winter, 1956 Winter | |
| Karl-Heinrich von Groddeck | Germany | Rowing | 1956 Summer, 1960 Summer, 1964 Summer | |
| Zygmunt Grodner | Poland | Fencing | 1952 Summer | |
| Hans Grodotzki | Germany | Athletics | 1960 Summer | |
| Marit Fiane Grødum | Norway | Football | 2008 Summer | |
| Øystein Grødum | Speed skating | 2006 Winter | |
| Stefan Grodzicki | Poland | Equestrian jumping | 1972 Summer | |
| Amos Grodzinowsky | Israel | Athletics | 1960 Summer | |
| Alexander von der Groeben | West Germany | Judo | 1984 Summer, 1988 Summer | |
| Annemarie Groen | Netherlands | Swimming | 1972 Summer | |
| Rob Groen | Rowing | 1964 Summer | |
| Tiemen Groen | Track cycling | 1964 Summer | |
| Jackie Groenen | Football | 2020 Summer | |
| Richard Groenendaal | Road cycling | 1992 Summer | |
| Renee Groeneveld | Sailing | 2012 Summer | |
| Bram Groeneweg | Athletics | 1928 Summer | |
| Sara Groenewegen | Canada | Softball | 2020 Summer | |
| Renate Groenewold | Netherlands | Speed skating | 2002 Winter, 2006 Winter, 2010 Winter | |
| Marijke Groenewoud | 2022 Winter | |
| Rosalind Groenewoud | Canada | Freestyle skiing | 2014 Winter, 2018 Winter | |
| Rob Groenhuyzen | Netherlands | Volleyball | 1964 Summer | |
| Oswald Groenings | Great Britain | Athletics | 1908 Summer | |
| Kristian Groenintwoud [ Wikidata ] | Australia | Handball | 2000 Summer | |
| Dolf Broese van Groenou | Netherlands | Art competitions | 1924 Summer | |
| Zdeněk Groessl | Czechoslovakia | Volleyball | 1968 Summer, 1972 Summer | |
| Ödön Gróf | Hungary | Swimming | 1936 Summer | |
| David Grogan | Great Britain | Water polo | 1936 Summer | |
| Hugh Grogan | United States | Lacrosse | 1904 Summer | |
| James Grogan | Figure skating | 1948 Winter, 1952 Winter | |
| David Grogono | Cayman Islands | Sailing | 1996 Summer | |
| Keith Grogono | Great Britain | 1936 Summer | |
| Klaus Grogorenz | Germany | Athletics | 1960 Summer | |
| Brigitte Groh | West Germany | Figure skating | 1988 Winter | |
| Jürgen Groh | Football | 1984 Summer | |
| Klaus Groh | Weightlifting | 1976 Summer | |
| Tim Grohmann | Germany | Rowing | 2012 Summer | |
| Karolína Grohová | Czech Republic | Cross country skiing | 2014 Winter, 2018 Winter | |
| Herbert Grohs | Austria | Football | 1952 Summer | |
| Régis Groisard | France | Athletics | 1996 Summer | |
| Henk Grol | Netherlands | Judo | 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Lucie Grolichová | Czech Republic | Modern pentathlon | 2008 Summer | |
| Otto Grolimund | Switzerland | Field hockey | 1948 Summer | |
| Elena Grölz | Germany | Handball | 1992 Summer | |
| Herman Groman | United States | Athletics | 1904 Summer | |
| Gudrun Grömer | Austria | Diving | 1948 Summer | |
| Nikolay Gromov | Soviet Union | Sailing | 1972 Summer | |
| Lyudmila Gromova | Artistic gymnastics | 1964 Summer | |
| Maria Gromova | Russia | Swimming | 2012 Summer | |
| Mariya Gromova | Artistic swimming | 2004 Summer, 2008 Summer, 2012 Summer | |
| Maja Grønbæk | Denmark | Handball | 2000 Summer | |
| Axel Grönberg | Sweden | Wrestling | 1948 Summer, 1952 Summer | |
| Gunnar Grönblom | Finland | Sailing | 1936 Summer | |
| Richard Grönblom | 1976 Summer, 1996 Summer | |
| Ronja Grönblom [ Wikidata ] | 2024 Summer | |
| Sven Grönblom | 1936 Summer | |
| Christian Grønborg | Denmark | 1988 Summer | |
| Valerio Grond | Switzerland | Cross country skiing | 2022 Winter | |
| Kelpo Gröndahl | Finland | Wrestling | 1948 Summer, 1952 Summer | |
| Tage Grøndahl | Denmark | Rowing | 1956 Summer, 1960 Summer | |
| Tobias Grøndahl | Norway | Handball | 2024 Summer | |
| Robert Grondelaers | Belgium | Road cycling | 1952 Summer | |
| Donavan Grondin | France | Track cycling | 2020 Summer | |
| Éliot Grondin | Canada | Snowboarding | 2018 Winter, 2022 Winter | |
| Bernd Gröne | West Germany | Road cycling | 1984 Summer, 1988 Summer | |
| Anna-Lena Grönefeld | Germany | Tennis | 2012 Summer, 2016 Summer | |
| Sverre Grøner | Norway | Artistic gymnastics | 1908 Summer | |
| Íris Grönfeldt | Iceland | Athletics | 1984 Summer, 1988 Summer | |
| Torsten Grönfors | Sweden | Sailing, Tennis | 1912 Summer | |
| Åke Grönhagen | Fencing, Modern pentathlon | 1912 Summer | |
| Kurt Grönholm | Finland | Rowing | 1952 Summer | |
| Peter Grönholm | Fencing | 1980 Summer | |
| Sari Grönholm | Snowboarding | 2002 Winter | |
| Dieter Gröning | Australia | Wrestling | 1960 Summer | |
| Peter Gröning | Germany | Track cycling | 1960 Summer | |
| Steven van Groningen | Netherlands | Rowing | 1984 Summer | |
| Ignatius Gronkowski | United States | Road cycling, Track cycling | 1924 Summer | |
| Sigurd Grønli | Norway | Rowing | 1948 Summer | |
| Ernst Grönlund | Finland | Football | 1936 Summer | |
| Timo Grönlund | Canoe sprint | 1976 Summer, 1980 Summer, 1984 Summer, 1988 Summer | |
| Timo Juhani Grönlund | Bolivia | Cross country skiing | 2018 Winter, 2022 Winter | |
| Jouni Grönman | Finland | Weightlifting | 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer | |
| Tuomas Grönman | Ice hockey | 1998 Winter | |
| Tuomas Grönman | Biathlon | 2018 Winter | |
| Elkana Grønne | Denmark | Artistic gymnastics | 1948 Summer | |
| Harald Grønningen | Norway | Cross country skiing | 1960 Winter, 1964 Winter, 1968 Winter | |
| Andrzej Gronowicz | Poland | Canoe sprint | 1972 Summer, 1976 Summer | |
| Janusz Gronowski | Athletics | 1960 Summer | |
| Tadeusz Gronowski | Art competitions | 1932 Summer | |
| Börje Grönroos | Finland | Boxing | 1952 Summer | |
| Tobias Grønstad | Norway | Athletics | 2024 Summer | |
| Nils Grönvall | Sweden | Fencing | 1912 Summer | |
| Audun Grønvold | Norway | Freestyle skiing | 2010 Winter | |
| Roar Grønvold | Speed skating | 1968 Winter, 1972 Winter | |
| Svend Aage Grønvold | Denmark | Rowing | 1928 Summer | |
| Stephanie De Groof | Belgium | Field hockey | 2012 Summer | |
| Angus Groom | Great Britain | Rowing | 2016 Summer, 2020 Summer | |
| Conal Groom | United States | 2000 Summer | |
| Margaret Groos | Athletics | 1988 Summer | |
| Ber Groosjohan | Netherlands | Football | 1920 Summer, 1924 Summer | |
| Nettie Grooss | Athletics | 1928 Summer | |
| Chantal Groot | Swimming | 2000 Summer, 2004 Summer, 2008 Summer | |
| Cor Groot | Sailing | 1968 Summer | |
| Daan de Groot | Track cycling | 1952 Summer | |
| Gert de Groot | Water polo | 1996 Summer | |
| Huug de Groot | Football | 1912 Summer | |
| Jannie de Groot | Swimming | 1948 Summer | |
| Joeri de Groot | Rowing | 2004 Summer | |
| Klaas de Groot | Wrestling | 1948 Summer | |
| Marie-José de Groot | Rowing | 1992 Summer | |
| Nycke Groot | Handball | 2016 Summer, 2020 Summer | |
| Sytske de Groot | Rowing | 2012 Summer | |
| Yorick de Groot [ Wikidata ] | Beach volleyball | 2024 Summer | |
| Maurice De Groote | Belgium | Artistic gymnastics | 1952 Summer | |
| Stefan Groothuis | Netherlands | Speed skating | 2006 Winter, 2010 Winter, 2014 Winter | |
| Joan Groothuysen | Canada | Cross country skiing | 1976 Winter, 1980 Winter | |
| Gérard Gropaiz | France | Swimming | 1960 Summer, 1964 Summer | |
| Walter Gropius | Germany | Art competitions | 1932 Summer | |
| Ana Gros | Slovenia | Handball | 2024 Summer | |
| Baptiste Gros | France | Cross country skiing | 2014 Winter, 2018 Winter | |
| Christelle Gros | Biathlon | 1998 Winter | |
| Jean-Paul Gros | Shooting | 1992 Summer, 1996 Summer, 2000 Summer | |
| Jerzy Gros | Poland | Athletics | 1976 Summer | |
| Mathilde Gros | France | Track cycling | 2020 Summer, 2024 Summer | |
| Piero Gros | Italy | Alpine skiing | 1976 Winter, 1980 Winter | |
| Sacha Gros | United States | 1998 Winter | |
| Alfred Grosche | West Germany | Ski jumping | 1972 Winter, 1976 Winter | |
| Audrey Grosclaude | France | Rhythmic gymnastics | 1996 Summer | |
| Maurice Grosclaude | Athletics | 1924 Summer | |
| Adolphe Groscol | Belgium | 1928 Summer | |
| Kate Grose | Great Britain | Rowing | 1988 Summer, 1992 Summer | |
| William Groseclose | United States | Golf | 1904 Summer | |
| Christopher Grose-Hodge | Great Britain | Fencing | 1952 Summer | |
| Fredy Grosheny [ Wikidata ] | France | Canoe sprint | 1960 Summer | |
| Yevgeni Groshev | Soviet Union | Ice hockey | 1960 Winter | |
| Elena Grosheva | Russia | Artistic gymnastics | 1996 Summer | |
| Gyula Grosics | Hungary | Football | 1952 Summer | |
| André Grosjean | Switzerland | Water polo | 1948 Summer | |
| Catherine Grosjean | France | Swimming | 1968 Summer | |
| Fernand Grosjean | Switzerland | Alpine skiing | 1948 Winter, 1952 Winter | |
| Georges Grosjean | Belgium | Field hockey | 1928 Summer | |
| Matthew Grosjean | United States | Alpine skiing | 1992 Winter, 1994 Winter, 1998 Winter | |
| Sébastien Grosjean | France | Tennis | 2004 Summer | |
| Edgar Grospiron | Freestyle skiing | 1992 Winter, 1994 Winter | |
| Anthony Gross | Great Britain | Art competitions | 1948 Summer | |
| Benno Groß | West Germany | Artistic gymnastics | 1984 Summer | |
| Chaim Gross | United States | Art competitions | 1932 Summer | |
| Edna Gross | Great Britain | Artistic gymnastics | 1936 Summer | |
| Ed Gross | United States | 1932 Summer | |
| Felix Groß | Germany | Track cycling | 2020 Summer | |
| George Gross | Canada | Water polo | 1976 Summer, 1984 Summer | |
| Gustav Gross | Austria | Ice hockey | 1948 Winter | |
| Julie-Anne Gross | France | Fencing | 1992 Summer | |
| Karl Groß | Germany | Wrestling | 1912 Summer | |
| Manuela Groß | East Germany | Figure skating | 1972 Winter, 1976 Winter | |
| Marcus Gross | Germany | Canoe sprint | 2012 Summer, 2016 Summer | |
| Mia Gross | Australia | Athletics | 2024 Summer | |
| Michael Gross | West Germany | Swimming | 1984 Summer, 1988 Summer | |
| Otto Groß | Germany | 1912 Summer | |
| Rainer Groß | East Germany | Cross country skiing | 1972 Winter | |
| Ricco Groß | Germany | Biathlon | 1992 Winter, 1994 Winter, 1998 Winter, 2002 Winter, 2006 Winter | |
| Stefano Gross | Italy | Alpine skiing | 2014 Winter, 2018 Winter | |
| Stéphanie Groß | Germany | Wrestling | 2004 Summer | |
| Theodore Gross | United States | Artistic gymnastics | 1904 Summer | |
| Lionel Grossain | France | Judo | 1964 Summer | |
| Henri Grossard [ Wikidata ] | Fencing | 1900 Summer | |
| Johannes Große | Germany | Field hockey | 2020 Summer, 2024 Summer | |
| Martha Grossenbacher | Switzerland | Athletics | 1992 Summer | |
| Pascale Grossenbacher | Artistic gymnastics | 1996 Summer | |
| Jorge Grosser | Chile | Athletics | 1968 Summer | |
| Abie Grossfeld | United States | Artistic gymnastics | 1956 Summer, 1960 Summer | |
| Muriel Grossfeld | 1956 Summer, 1960 Summer, 1964 Summer | |
| Fabio Grossi | Italy | Athletics | 1992 Summer | |
| Franco Grossi | 1960 Summer | |
| Luigi Grossi | 1952 Summer | |
| Oreste Grossi | Rowing | 1936 Summer | |
| Orietta Grossi | Basketball | 1980 Summer | |
| Ferdinand Grössing | Austria | Bobsleigh | 1984 Winter | |
| Ciril Grossklaus | Switzerland | Judo | 2016 Summer | |
| Natalia Grossman | United States | Sport climbing | 2024 Summer | |
| Frédéric Grossmann | France | Rowing | 1920 Summer | |
| Georg Großmann | West Germany | Bobsleigh | 1980 Winter | |
| Greg Grossmann | Canada | Alpine skiing | 1988 Winter | |
| Zdenka Grossmannová | Czechoslovakia | Canoe slalom | 1992 Summer | |
| Harry Grossmiller | United States | Rowing | 1932 Summer | |
| Guy Grossmith | Zimbabwe | Sailing | 1984 Summer | |
| Arlette Grosso | France | Alpine skiing | 1960 Winter | |
| Domenico Grosso | Italy | Artistic gymnastics | 1948 Summer | |
| Julia Grosso | Canada | Football | 2020 Summer, 2024 Summer | |
| Lucien Grosso | France | Bobsleigh | 1956 Winter | |
| Felix Großschartner | Austria | Road cycling | 2024 Summer | |
| Rudolf Größwang | West Germany | Luge | 1976 Winter | |
| Eduard-Michael Grosu | Romania | Road cycling | 2020 Summer | |
| William Grosvenor | Great Britain | Shooting | 1912 Summer, 1920 Summer, 1924 Summer | |
| George Grosz | Germany | Art competitions | 1928 Summer | |
| István Grósz | Hungary | Athletics | 1924 Summer | |
| Friedrich von Grote [ Wikidata ] | Germany | Equestrian jumping | 1912 Summer | |
| Henry Grote | United States | Diving | 1908 Summer | |
| Kurt Grote | Swimming | 1996 Summer | |
| Simon Grotelüschen | Germany | Sailing | 2012 Summer | |
| Jonathan Groth | Denmark | Table tennis | 2016 Summer, 2020 Summer, 2024 Summer | |
| Morgan Groth | United States | Athletics | 1964 Summer | |
| Sam Groth | Australia | Tennis | 2016 Summer | |
| Christian Grøthan | Denmark | Football | 1920 Summer | |
| Gisela Grothaus | West Germany | Canoe slalom | 1972 Summer | |
| Christopher Grotheer | Germany | Skeleton | 2018 Winter, 2022 Winter | |
| Martin Grothkopp | Bobsleigh | 2018 Winter | |
| Maret Grothues | Netherlands | Volleyball | 2016 Summer | |
| Wim Grothuis | Rowing | 1972 Summer | |
| Pål Grotnes | Norway | Ice hockey | 2010 Winter | |
| Lucio Grotone | Brazil | Boxing | 1952 Summer | |
| Henryk Grotowski | Poland | Field hockey | 1972 Summer | |
| Rafał Grotowski | 2000 Summer | |
| Steve Grotowski | Great Britain | Beach volleyball | 2012 Summer | |
| Sissel Grottenberg | Norway | Athletics | 1988 Summer | |
| Howard Grotts | United States | Cycling mountain bike | 2016 Summer | |
| Johan Grøttumsbråten | Norway | Cross country skiing, Nordic combined | 1924 Winter, 1928 Winter, 1932 Winter | |
| Maria Grötzer | Austria | Fencing | 1960 Summer | |
| Sébastien Groulx | Canada | Weightlifting | 2000 Summer | |
| Eran Groumi | Israel | Swimming | 1992 Summer | |
| Élisabeth Grousselle | France | Athletics | 2004 Summer | |
| Maxime Grousset | Swimming | 2020 Summer, 2024 Summer | |
| Cam Grout | Canada | 1960 Summer | |
| Glen Grout | Diving | 1976 Summer | |
| Martinus Grov | Norway | Archery | 1992 Summer, 1996 Summer, 2000 Summer | |
| Karoline Bjerkeli Grøvdal | Athletics | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Clare Grove | Great Britain | Rowing | 1976 Summer | |
| Kenneth Grove | Australia, Austria | Diving | 1972 Summer, 1980 Summer | |
| Alan Grover | Australia | Rowing | 1964 Summer, 1968 Summer, 1972 Summer | |
| Dov Groverman | Israel | Wrestling | 1988 Summer | |
| Kristina Groves | Canada | Speed skating | 2002 Winter, 2006 Winter, 2010 Winter | |
| Madeline Groves | Australia | Swimming | 2016 Summer | |
| Nicola Groves | Great Britain | Sailing | 2016 Summer | |
| Max Groy | Germany | 2004 Summer | |
| Alfred Groyer | Austria | Ski jumping | 1980 Winter | |
| Emil Groytsev | Bulgaria | Rowing | 1988 Summer | |
| Alex Groza | United States | Basketball | 1948 Summer | |
| Ana Maria Groza | Romania | Athletics | 2000 Summer, 2004 Summer, 2008 Summer | |
| Anca Groza | Swimming | 1972 Summer | |
| Dusan Grozaj | West Germany | 1972 Summer | |
| Maja Grozdanić | Serbia and Montenegro | 1996 Summer | |
| Vladimir Grozdanović | Yugoslavia | Shooting | 1960 Summer, 1968 Summer | |
| Maria Grozdeva | Bulgaria | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer, 2020 Summer | |
| Svetlana Grozdova | Soviet Union | Artistic gymnastics | 1976 Summer | |
| Claudiu Grozea | Romania | Speed skating | 2006 Winter | |
| György Grozer | Germany | Volleyball | 2012 Summer, 2024 Summer | |
| István Grózner | Hungary | Equestrian eventing | 1980 Summer | |
| Emil Grub | Switzerland | Field hockey | 1948 Summer | |
| Freddie Grubb | Great Britain | Road cycling | 1912 Summer | |
| Timothy Grubb | Equestrian jumping | 1984 Summer, 1992 Summer | |
| Andrzej Grubba | Poland | Table tennis | 1988 Summer, 1992 Summer, 1996 Summer | |
| Linda Grubben | Norway | Biathlon | 2002 Winter, 2006 Winter | |
| Cecilia Grubbström | Sweden | Handball | 2012 Summer | |
| Chris Grube | Great Britain | Sailing | 2016 Summer, 2020 Summer, 2024 Summer | |
| Wilfried Grube | Germany | Field hockey | 1952 Summer | |
| Drago Grubelnik | Slovenia | Alpine skiing | 1998 Winter, 2002 Winter, 2006 Winter | |
| Federico Grüben | Argentina | Shooting | 1948 Summer | |
| Paul Grubenthal | Austria | Artistic gymnastics | 1952 Summer | |
| Adolf Gruber | Athletics | 1952 Summer, 1956 Summer, 1960 Summer | |
| Bernhard Gruber | Nordic combined | 2010 Winter, 2014 Winter, 2018 Winter | |
| Bettina Gruber | Switzerland | Cross country skiing | 2010 Winter, 2014 Winter | |
| Charlie Gruber | United States | Athletics | 2004 Summer | |
| Christoph Gruber | Austria | Alpine skiing | 2002 Winter, 2006 Winter | |
| Franz Gruber | 1984 Winter | |
| Friedrich Gruber | Sailing | 1992 Summer | |
| György Gruber | Hungary | Shooting | 1976 Summer | |
| Herbert Gruber | Austria | Bobsleigh | 1964 Winter, 1968 Winter, 1972 Winter | |
| Jan Gruber | Czech Republic | Rowing | 2008 Summer | |
| Jesús Gruber | Venezuela | Fencing | 1960 Summer | |
| Michael Gruber | Austria | Nordic combined | 2002 Winter, 2006 Winter | |
| Patrick Gruber | Italy | Luge | 2002 Winter, 2006 Winter, 2010 Winter, 2014 Winter | |
| Wolfgang Gruber | West Germany | Boxing | 1976 Summer | |
| Władysław Gruberski | Poland | Art competitions | 1928 Summer | |
| Jelena Grubišić | Croatia | Handball | 2012 Summer | |
| Špiro Grubišić | Yugoslavia | Rowing | 1936 Summer | |
| Luka Grubor | Great Britain | 2000 Summer | |
| Dorota Gruca | Poland | Athletics | 2008 Summer | |
| Sylwia Gruchała | Fencing | 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Kasia Gruchalla-Wesierski | Canada | Rowing | 2020 Summer, 2024 Summer | |
| André Gruchet | France | Track cycling | 1956 Summer, 1960 Summer | |
| Sandrine Gruda | Basketball | 2012 Summer, 2016 Summer, 2020 Summer | |
| Yelena Grudneva | Unified Team | Artistic gymnastics | 1992 Summer | |
| Józef Grudzień | Poland | Boxing | 1964 Summer, 1968 Summer | |
| Bernard Gruener | France | Swimming | 1968 Summer | |
| Lukas Gruener | Austria | Snowboarding | 2006 Winter, 2010 Winter | |
| Richard Gruenther | United States | Modern pentathlon | 1948 Summer | |
| Jim Gruenwald | Wrestling | 2000 Summer, 2004 Summer | |
| Daniel Grueso | Colombia | Athletics | 2008 Summer | |
| Valerie Gruest | Guatemala | Swimming | 2016 Summer | |
| Aimé Gruet-Masson | France | Biathlon | 1968 Winter, 1972 Winter, 1976 Winter | |
| Vasil Gruev | Bulgaria | Cross country skiing | 1952 Winter | |
| Johann Grugger | Austria | Alpine skiing | 2010 Winter | |
| Hans Gruhne | Germany | Rowing | 2008 Summer, 2016 Summer, 2020 Summer | |
| Gheorghe Gruia | Romania | Handball | 1972 Summer | |
| Constantin Gruiescu | Boxing | 1972 Summer, 1976 Summer | |
| Miloje Grujić | Yugoslavia | Athletics | 1960 Summer | |
| Mladen Grujić | Biathlon | 1992 Winter | |
| Nebojša Grujić | Serbia | Canoe sprint | 2016 Summer | |
| Slobodan Grujić | Independent Olympians, Serbia and Montenegro | Table tennis | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer | |
| Ruth Grulkowski | United States | Artistic gymnastics | 1952 Summer | |
| Alfonso Grullart | Dominican Republic | Weightlifting | 1996 Summer | |
| Dumitru Grumezescu | Romania | Rowing | 1972 Summer, 1976 Summer | |
| Émile Grumiaux | France | Archery | 1900 Summer | |
| Gauthier Grumier | Fencing | 2012 Summer, 2016 Summer | |
| Steffen Grummt | East Germany | Athletics | 1980 Summer | |
| Harry Grumpelt | United States | 1912 Summer | |
| Josef Grumser | Austria | Boxing | 1960 Summer | |
| Angelina Grün | Germany | Volleyball | 2000 Summer, 2004 Summer | |
| Johny Grün | Luxembourg | Weightlifting | 1920 Summer, 1924 Summer | |
| René Grün | Boxing | 1960 Summer | |
| Jermain Grünberg | Netherlands | Artistic gymnastics | 2024 Summer | |
| Willy Grundbacher | Switzerland | Modern pentathlon | 1936 Summer | |
| Helena Grundberg | Sweden | Figure skating | 1998 Winter | |
| Jonte Grundelius | Snowboarding | 2006 Winter | |
| Mārtiņš Grundmanis | Latvia | Basketball | 1936 Summer | |
| Claudia Grundmann | Germany | Ice hockey | 2002 Winter, 2006 Winter | |
| Wilhelm Grundmann | Wrestling | 1908 Summer | |
| Stephanie Grundsøe | Denmark | Shooting | 2024 Summer | |
| Leopold Grundwald | Austria | Football | 1912 Summer | |
| David Grundy | New Zealand | Field hockey | 1992 Summer | |
| Andi Grünenfelder | Switzerland | Cross country skiing | 1984 Winter, 1988 Winter | |
| Corina Grünenfelder | Alpine skiing | 2002 Winter | |
| Georg Grünenfelder | 1964 Winter | |
| Jürg Grünenfelder | 1998 Winter | |
| Tobias Grünenfelder | 2002 Winter, 2006 Winter, 2010 Winter | |
| Jean Grüner | Field hockey | 1936 Summer, 1948 Summer, 1952 Summer | |
| Klaus Gruner | East Germany | Handball | 1980 Summer | |
| Oliver Grüner | West Germany | Rowing | 1988 Summer | |
| Sybille Gruner | Germany | Handball | 1992 Summer | |
| William Grüner | Sweden | Athletics | 1912 Summer, 1920 Summer | |
| Martina Grunert | Germany, East Germany | Swimming | 1964 Summer, 1968 Summer | |
| Isaac Grünewald | Sweden | Art competitions | 1932 Summer | |
| Ernie Grunfeld | United States | Basketball | 1976 Summer | |
| Emil Grünig | Switzerland | Shooting | 1948 Summer | |
| Christine von Grünigen | Alpine skiing | 1992 Winter, 1994 Winter | |
| Michael von Grünigen | 1992 Winter, 1994 Winter, 1998 Winter, 2002 Winter | |
| Ernst von Grünigen | Ski jumping | 1972 Winter, 1976 Winter | |
| Klaus-Jürgen Grünke | East Germany | Track cycling | 1976 Summer | |
| Iver Grunnet | Denmark | Handball | 1980 Summer | |
| Anky van Grunsven | Netherlands | Equestrian dressage | 1988 Summer, 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Charles P. Gruppé | United States | Art competitions | 1932 Summer | |
| Joachim Gruppelaar | Netherlands | Equestrian jumping | 1948 Summer | |
| Jesse Grupper | United States | Sport climbing | 2024 Summer | |
| Mario Gruppioni | Italy | Wrestling | 1932 Summer | |
| Vitalie Grușac | Moldova | Boxing | 2000 Summer, 2004 Summer, 2008 Summer | |
| Vladimir Grushikhin | Armenia, Russia | Canoe sprint | 2000 Summer, 2004 Summer | |
| Elena Grushina | Ukraine | Figure skating | 1998 Winter, 2002 Winter, 2006 Winter | |
| Vera Grushkina | Soviet Union | Athletics | 1968 Summer | |
| Olga Grushko | Kazakhstan | Volleyball | 2008 Summer | |
| Nicolas Gruson | France | Swimming | 1996 Summer | |
| Paul Gruson | Germany | Art competitions | 1932 Summer | |
| Piotr Gruszka | Poland | Volleyball | 1996 Summer, 2004 Summer, 2008 Summer | |
| William Grut | Sweden | Modern pentathlon | 1948 Summer | |
| Henryk Gruth | Poland | Ice hockey | 1980 Winter, 1984 Winter, 1988 Winter, 1992 Winter | |
| Alfred Grütter | Switzerland | Shooting | 1900 Summer | |
| André Grütter | Snowboarding | 1998 Winter | |
| Peter Grütter | Figure skating | 1964 Winter | |
| Stefan Grützner | East Germany | Weightlifting | 1972 Summer | |
| Dmitriy Gruzdev | Kazakhstan | Road cycling | 2020 Summer | |
| Vladimer Gruzdevi | Unified Team, Georgia | Sailing | 1992 Summer, 1996 Summer | |
| Yelena Gruzinova | Russia | Athletics | 1996 Summer | |
| Nina Gruzintseva | Soviet Union | Canoe sprint | 1964 Summer | |
| Edgars Gruzītis | Latvia | Cross country skiing, Nordic combined | 1936 Winter | |
| Jørgen Gry | Denmark | Field hockey | 1936 Summer | |
| Kirk Grybowski | Virgin Islands | Sailing | 1984 Summer | |
| Marek Grycz [ Wikidata ] | Czech Republic | Modern pentathlon | 2024 Summer | |
| Kateryna Grygorenko | Ukraine | Cross country skiing | 2006 Winter, 2010 Winter, 2014 Winter | |
| Nataliya Grygoryeva | Soviet Union, Ukraine | Athletics | 1988 Summer, 1996 Summer | |
| Antonios Gryllos | Greece | Wrestling | 1948 Summer | |
| David Grylls | United States | Track cycling | 1984 Summer | |
| Veronica Grymonprez | Belgium | Artistic gymnastics | 1960 Summer, 1964 Summer | |
| Jerzy Gryt | Poland | Wrestling | 1952 Summer | |
| Ewa Gryziecka | Athletics | 1972 Summer | |
| Florian Grzechowiak | Basketball | 1936 Summer | |
| Ryszard Grzegorczyk | Football | 1960 Summer | |
| Krzysztof Grzegorek | Fencing | 1972 Summer | |
| Adam Grzegorzewski | Equestrian jumping | 2024 Summer | |
| Bogdan Grzejszczak | Athletics | 1976 Summer | |
| Tadeusz Grzelak | Boxing | 1952 Summer | |
| Janusz Grzemowski | Luge | 1972 Winter | |
| Józef Grzesiak | Boxing | 1964 Summer | |
| Beata Grzesik | Canoe slalom | 2000 Summer | |
| Robert Grzeszczak | Field hockey | 2000 Summer | |
| Łukasz Grzeszczuk | Athletics | 2016 Summer | |
| Katarzyna Grzybowska | Table tennis | 2012 Summer, 2016 Summer | |
| Magdalena Grzybowska | Tennis | 1996 Summer | |
| Marcin Grzybowski | Canoe sprint | 2008 Summer, 2012 Summer | |
| Magdalena Grzywa | Biathlon | 2006 Winter | |
| Dariusz Grzywiński | Wrestling | 1988 Summer, 1992 Summer | |
| Alexander Gschliesser | Italy | Ice hockey | 1994 Winter | |
| Peter Gschnitzer | Luge | 1976 Winter, 1980 Winter | |
| Selina Gschwandtner | Germany | Shooting | 2016 Summer | |
| Georges Gschwind | Switzerland | Rowing | 1936 Summer | |
| Karl Gschwind | Boxing | 1972 Summer | |
| Hans Gstöttner | East Germany, Germany | Wrestling | 1988 Summer, 1992 Summer | |
| Bernhard Gstrein | Austria | Alpine skiing | 1988 Winter, 1992 Winter, 1994 Winter | |
| Josl Gstrein | Cross country skiing, Nordic combined | 1948 Winter | |
| Knud Gøtke [ Wikidata ] | Denmark | Rowing | 1912 Summer | |
| Gu Beibei | China | Artistic swimming | 2004 Summer, 2008 Summer | |
| Gu Bingfeng | Field hockey | 2020 Summer, 2024 Summer | |
| Gu Bon-gil | South Korea | Fencing | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Daniel Gu [ Wikidata ] | Canada | 2024 Summer | |
| Eileen Gu | China | Freestyle skiing | 2022 Winter | |
| Gu Gyo-dong | South Korea | Fencing | 1992 Summer | |
| Gu Hong | China | Boxing | 2020 Summer | |
| Gu Hyeon-suk | South Korea | Judo | 1992 Summer | |
| Gu Jiahong | China | Rowing | 1984 Summer | |
| Gu Jin-su | South Korea | Field hockey | 1996 Summer | |
| Gu Juan | Singapore | Badminton | 2012 Summer | |
| Gu Jun | China | 1996 Summer, 2000 Summer | |
| Gu Junjie | Athletics | 2008 Summer | |
| Gu Mun-yeong | South Korea | Field hockey | 1992 Summer | |
| Gu Sang-bum | Football | 1988 Summer | |
| Gu Sung-eun | Road cycling | 2008 Summer | |
| Gu Sung-yun | Football | 2016 Summer | |
| Gu Xiao | China | Artistic swimming | 2016 Summer | |
| Gu Xiaoli | Rowing | 1992 Summer, 1996 Summer | |
| Gu Xuesong | Archery | 2016 Summer | |
| Gu Yan | Athletics | 1996 Summer | |
| Gu Yaoyao | Rugby sevens | 2020 Summer, 2024 Summer | |
| Gu Yasha | Football | 2008 Summer, 2016 Summer | |
| Gu Yu | Boxing | 2008 Summer | |
| Gu Yuan | Athletics | 2004 Summer | |
| Lucio Guachalla | Bolivia | 1976 Summer | |
| Luis Antonio de Guadalmina [ Wikidata ] | Spain | Equestrian driving | 1900 Summer | |
| Eduardo Guadamud | Ecuador | Weightlifting | 2008 Summer | |
| José Alberto Guadarrama | Mexico | Football | 1992 Summer | |
| Ageze Guadie | Israel | Athletics | 2016 Summer | |
| Lorena Guado | Argentina | Shooting | 1996 Summer | |
| Gianna Guaita [ Wikidata ] | Italy | Artistic gymnastics | 1936 Summer | |
| Flávio Gualberto | Brazil | Volleyball | 2024 Summer | |
| Mirco Gualdi | Italy | Road cycling | 1992 Summer | |
| Jacques Ben Gualid | Morocco | Fencing | 1960 Summer | |
| Byron Guamá | Ecuador | Road cycling | 2012 Summer, 2016 Summer | |
| Maritza Guamán | Athletics | 2016 Summer | |
| Yadira Guamán | 2012 Summer | |
| Guan Chenchen | China | Artistic gymnastics | 2020 Summer | |
| Guan Bunima | Wrestling | 1984 Summer | |
| Guan Weinan | Ice hockey | 2002 Winter | |
| Guan Weizhen | Badminton | 1992 Summer | |
| Guan Xin | Basketball | 2012 Summer | |
| Guan Yingnan | Athletics | 2000 Summer, 2004 Summer | |
| Guan Yingying | Ice hockey | 2022 Winter | |
| Guan Zewen | Artistic swimming | 1992 Summer | |
| Guan Ziyan | Freestyle skiing | 2018 Winter | |
| Francisco Guanco | Philippines | Swimming | 1984 Summer | |
| Li Guangquan | China | Alpine skiing | 1984 Winter | |
| Niu Guangsheng [ Wikidata ] | Swimming | 2024 Summer | |
| Laëtitia Guapo | France | 3x3 basketball | 2020 Summer, 2024 Summer | |
| Francisco Guaragna Rigonat | Argentina | Sailing | 2020 Summer, 2024 Summer | |
| Gioacchino Guaragna | Italy | Fencing | 1928 Summer, 1932 Summer, 1936 Summer | |
| Peter Guarasci | Canada | Basketball | 2000 Summer | |
| Désiré Guard | France | Field hockey | 1920 Summer | |
| Nelson Guarda | Brazil | Rowing | 1956 Summer | |
| Albert Guardado | United States | Boxing | 1996 Summer | |
| Alvaro Guardia | Costa Rica | Shooting | 1980 Summer, 1992 Summer | |
| Bernardo de la Guardia | Fencing | 1936 Summer | |
| Enrique Guardia | Spain | Water polo | 1972 Summer | |
| Guillermo Guardia | Costa Rica | Football | 1984 Summer | |
| Vicente de la Guardia | Cuba | Sailing | 1980 Summer | |
| Fabio Guardigli | San Marino | Alpine skiing | 1988 Winter | |
| Gedeón Guardiola | Spain | Handball | 2012 Summer, 2020 Summer | |
| Jorge Guardiola | Shooting | 1988 Summer, 1992 Summer | |
| Pep Guardiola | Football | 1992 Summer | |
| Marcello Guarducci | Italy | Swimming | 1972 Summer, 1976 Summer, 1984 Summer | |
| Giulia Guarieiro | Brazil | Handball | 2020 Summer, 2024 Summer | |
| Matteo Guarise | Italy | Figure skating | 2014 Winter, 2018 Winter, 2022 Winter | |
| Osmar Guarnelli | Brazil | Football | 1972 Summer | |
| Megan Guarnier | United States | Road cycling | 2016 Summer | |
| Adriano Guarnieri | Italy | Alpine skiing | 1936 Winter | |
| Jorge Guarnieri | Argentina | Shooting | 2000 Summer | |
| Rodolfo Guarnieri | 1968 Summer | |
| Ricardo Guasch | Mexico | Equestrian jumping | 1964 Summer, 1968 Summer | |
| Rodolfo Guaves | Philippines | Track cycling | 1984 Summer | |
| Rolando Guaves | 1968 Summer | |
| Erik Guay | Canada | Alpine skiing | 2006 Winter, 2010 Winter, 2014 Winter | |
| Lucie Guay | Canoe sprint | 1984 Summer | |
| Paul Guay | United States | Ice hockey | 1984 Winter | |
| Vittoria Guazzini | Italy | Track cycling | 2020 Summer, 2024 Summer | |
| Paulina Guba | Poland | Athletics | 2016 Summer, 2020 Summer | |
| Anastasiia Gubanova | Georgia | Figure skating | 2022 Winter | |
| Ernő Gubányi | Hungary | Handball | 1976 Summer, 1980 Summer | |
| Sergey Gubarev | Kazakhstan | Water polo | 2012 Summer | |
| Gulnaz Gubaydullina | Russia, Russian Olympic Committee | Modern pentathlon | 2016 Summer, 2020 Summer | |
| Cor Gubbels | Netherlands | Athletics | 1920 Summer | |
| Chelsea Gubecka | Australia | Marathon swimming | 2016 Summer, 2024 Summer | |
| Peter Gübeli | Switzerland | Rowing | 1948 Summer | |
| Jasminka Guber | Bosnia and Herzegovina | Athletics | 2004 Summer | |
| Ante Guberina | Yugoslavia | Rowing | 1964 Summer | |
| Ivan Gubijan | Athletics | 1948 Summer, 1952 Summer | |
| Aleksandr Gubin | Soviet Union | Cross country skiing | 1960 Winter, 1964 Winter | |
| Tatyana Gubina | Kazakhstan | Water polo | 2000 Summer, 2004 Summer | |
| Irina Gubkina | Unified Team, Russia | Luge | 1992 Winter, 1994 Winter, 1998 Winter | |
| Lyudmila Gubkina | Belarus | Athletics | 2000 Summer | |
| Gary Gubner | United States | Weightlifting | 1964 Summer | |
| Kim Gubser | Switzerland | Freestyle skiing | 2022 Winter | |
| Gregory Gucassoff | Belgium | Field hockey | 2008 Summer | |
| Chris Guccione | Australia | Tennis | 2008 Summer, 2016 Summer | |
| Matic Ian Guček | Slovenia | Athletics | 2024 Summer | |
| Vladimir Guchsha | Kazakhstan | Shooting | 2000 Summer | |
| Mehmet Güçlü | Turkey | Wrestling | 1972 Summer | |
| Mateusz Gucman | Poland | 2008 Summer | |
| György Guczoghy | Hungary | Artistic gymnastics | 1980 Summer, 1988 Summer | |
| Leo Gudas | Czechoslovakia | Ice hockey | 1992 Winter | |
| Radko Gudas | Czech Republic | 2014 Winter | |
| Guram Gudashvili | Soviet Union | Athletics | 1968 Summer | |
| Zigmas Gudauskas | Lithuania | Rowing | 1992 Summer | |
| Halldór Guðbjörnsson | Iceland | Judo | 1980 Summer | |
| Franziska Gude | Germany | Field hockey | 2000 Summer, 2004 Summer | |
| Helmut Gude | Athletics | 1952 Summer | |
| Aušra Gudeliūnaitė | Soviet Union | Rowing | 1988 Summer | |
| Bruno Gudelj | Croatia | Handball | 1996 Summer | |
| Ivan Gudelj | Yugoslavia | Football | 1980 Summer | |
| Johann Baptist Gudenus | Austria | Bobsleigh, Athletics | 1932 Winter, 1936 Summer, 1936 Winter | |
| Ercüment Güder | Turkey | Football | 1952 Summer | |
| Marcia Gudereit | Canada | Curling | 1998 Winter | |
| Tatiana Guderzo | Italy | Road cycling, Track cycling | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Maurice Gudin de Vallerin | France | Equestrian jumping | 1936 Summer | |
| Natalia Gudina | Israel | Figure skating | 2002 Winter | |
| Jorge Gudiño | Mexico | Basketball | 1948 Summer | |
| Viðar Guðjohnsen | Iceland | Judo | 1976 Summer | |
| Snorri Guðjónsson | Handball | 2004 Summer, 2008 Summer, 2012 Summer | |
| Tatyana Gudkova | Russia | Athletics | 2000 Summer | |
| Birgir Guðlaugsson | Iceland | Cross country skiing | 1964 Winter | |
| Kristers Gudļevskis | Latvia | Ice hockey | 2014 Winter | |
| Hrafnhildur Guðmundsdóttir | Iceland | Swimming | 1964 Summer, 1968 Summer | |
| Íris Guðmundsdóttir | Alpine skiing | 2010 Winter | |
| Lilja Guðmundsdóttir | Athletics | 1976 Summer | |
| Ari Guðmundsson | Swimming, Ski jumping | 1948 Summer, 1952 Winter | |
| Bjarni Guðmundsson | Handball | 1984 Summer | |
| Brynjar Guðmundsson | Alpine skiing | 2014 Winter | |
| Friðrik Guðmundsson | Athletics | 1952 Summer | |
| Friðrik Guðmundsson | Swimming | 1972 Summer | |
| Guðjón Guðmundsson | 1972 Summer | |
| Guðmundur Guðmundsson | Handball | 1984 Summer, 1988 Summer | |
| Hjalti Guðmundsson | Swimming | 2000 Summer | |
| Hreiðar Guðmundsson | Handball | 2008 Summer, 2012 Summer | |
| Jón Ingi Guðmundsson | Water polo | 1936 Summer | |
| Niklas Gudmundsson | Sweden | Football | 1992 Summer | |
| Pétur Guðmundsson | Iceland | Athletics | 1988 Summer, 1992 Summer | |
| Ragnar Guðmundsson | Swimming | 1988 Summer | |
| Skarphéðinn Guðmundsson | Ski jumping | 1960 Winter | |
| Þórður Guðmundsson | Water polo | 1936 Summer | |
| Guðni Valur Guðnason | Athletics | 2016 Summer, 2020 Summer | |
| Oskars Gudramovičs | Latvia | Luge | 2010 Winter, 2014 Winter, 2018 Winter | |
| Timothy Gudsell | New Zealand | Road cycling | 2008 Summer | |
| Marko Gudurić | Serbia | Basketball | 2024 Summer | |
| Valeriia Gudym | Ukraine | Rhythmic gymnastics | 2012 Summer, 2016 Summer | |
| Lyudmila Gudz | Unified Team | Handball | 1992 Summer | |
| Daina Gudzinevičiūtė | Lithuania | Shooting | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Andrius Gudžius | Athletics | 2016 Summer, 2020 Summer, 2024 Summer | |
| Dominique Guebey | France | 1984 Summer | |
| Enrique Guedes | Cuba | Shooting | 1968 Summer | |
| Ricardo Guedes | Uruguay | Road cycling | 1996 Summer | |
| Javier Guédez | Venezuela | Judo | 2008 Summer, 2012 Summer | |
| Antoinette Guedia Mouafo | Cameroon | Swimming | 2008 Summer, 2012 Summer | |
| Élodie Guégan | France | Athletics | 2008 Summer | |
| Michel Gueguen | Modern pentathlon | 1972 Summer, 1976 Summer | |
| Raoul Gueguen | 1968 Summer, 1972 Summer | |
| Wandou Guehi | Ivory Coast | Handball | 1988 Summer | |
| Delphine Guehl | France | 2004 Summer | |
| Floria Gueï | Athletics | 2012 Summer, 2016 Summer, 2020 Summer | |
| Maurice Gueissaz | Switzerland | Rowing | 1948 Summer | |
| Ferdinand Gueldry | France | Art competitions | 1912 Summer | |
| Eduardo Guelfand | Argentina | Field hockey | 1968 Summer | |
| Claudia Gueli | Australia | Freestyle skiing | 2018 Winter | |
| Christophe Guelpa | France | Shooting | 1988 Summer | |
| Robert Guelpa | Rowing | 1928 Summer | |
| Fabrice Guelzec | Artistic gymnastics | 1992 Summer | |
| Georges Guelzec | 1972 Summer | |
| Abraham Guem | South Sudan | Athletics | 2020 Summer, 2024 Summer | |
| Denise Guénard | France | 1952 Summer, 1960 Summer, 1964 Summer | |
| German Guenard | Puerto Rico | 1960 Summer | |
| Mahmoud Guendouz | Algeria | Football | 1980 Summer | |
| Danielle Guéneau | France | Athletics | 1964 Summer | |
| Wanda Guenette | Canada | Volleyball | 1996 Summer | |
| Talaat Guenidi | Egypt | Basketball | 1972 Summer | |
| Gérald Guennelon | France | Ice hockey | 1992 Winter, 1994 Winter | |
| Olfa Guenni | Tunisia | Table tennis | 2004 Summer | |
| Amine Guennichi | Wrestling | 2020 Summer | |
| Christophe Guénot | France | 2008 Summer, 2012 Summer | |
| Steeve Guénot | 2008 Summer, 2012 Summer | |
| Lloyd Guenther | United States | Speed skating | 1932 Winter | |
| Anthonij Guépin | Netherlands | Sailing | 1924 Summer | |
| Martine Guépin | France | Shooting | 1988 Summer | |
| Henri Guerbois | Art competitions | 1924 Summer | |
| Mario Guerci | Argentina | Rowing | 1948 Summer | |
| Philippe Guerdat | Switzerland | Equestrian jumping | 1984 Summer, 1988 Summer | |
| Steve Guerdat | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Michelle Guerette | United States | Rowing | 2004 Summer, 2008 Summer | |
| Daniela Guergueltcheva | Bulgaria | Table tennis | 1988 Summer, 1992 Summer | |
| Abdel Ghani Guériguer | Morocco | Athletics | 1992 Summer | |
| Vanina Guerillot [ Wikidata ] | Portugal | Alpine skiing | 2022 Winter | |
| Bill Guerin | United States | Ice hockey | 1998 Winter, 2002 Winter, 2006 Winter | |
| Charles Guérin [ Wikidata ] | France | Fencing | 1900 Summer | |
| Henri Guérin | 1948 Summer | |
| Lina Guérin | Rugby sevens | 2016 Summer, 2020 Summer | |
| Vincenzo Guerini | Italy | Athletics | 1972 Summer, 1976 Summer | |
| Stéphane Guérinot | France | Rowing | 1996 Summer | |
| Audrey Guérit | Swimming | 1992 Summer | |
| L. Guerner | United States | Artistic gymnastics | 1904 Summer | |
| Rabiou Guero Gao | Niger | Athletics | 2012 Summer | |
| Jean-Pierre Guéron | Switzerland | Speed skating | 1964 Winter | |
| Alejandra de la Guerra | Peru | Volleyball | 1988 Summer | |
| Alejandro Guerra | Argentina | Biathlon | 1992 Winter | |
| Ascension Guerra | Spain | Archery | 1984 Summer | |
| Carlos Guerra | Mexico | Volleyball | 2016 Summer | |
| Carlos de la Guerra | Peru | Athletics | 1936 Summer | |
| Clara Guerra | Italy | Rowing | 2024 Summer | |
| Elena Guerra | Uruguay | Athletics | 2004 Summer | |
| Elvira Guerra | Italy | Equestrian dressage | 1900 Summer | |
| Evandro Guerra | Brazil | Volleyball | 2016 Summer | |
| Gino Guerra | Italy | Track cycling | 1948 Summer | |
| Ignacio Guerra | Chile | Athletics | 2008 Summer | |
| Jaime Guerra | Mexico | Equestrian jumping | 1992 Summer, 1996 Summer | |
| Javier Guerra | Water polo | 1976 Summer | |
| Javier Guerra | Spain | Athletics | 2020 Summer | |
| Jorge Guerra | Chile | Road cycling | 1936 Summer | |
| José Guerra | Cuba | Diving | 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| José Francisco Guerra | Spain | Fencing | 1992 Summer, 1996 Summer | |
| Leyde Guerra | Peru | Athletics | 2020 Summer | |
| Lisandra Guerra | Cuba | Track cycling | 2008 Summer, 2012 Summer, 2016 Summer | |
| Manuel Guerra | Portugal | Shooting | 1924 Summer, 1932 Summer | |
| Manuel Guerra | Spain | Swimming | 1948 Summer | |
| Maria Isabel Guerra | Brazil | 1972 Summer | |
| Patricia Guerra | Spain | Sailing | 1988 Summer, 1992 Summer | |
| Paulo Guerra | Portugal | Athletics | 1996 Summer | |
| Pietro Guerra | Italy | Road cycling | 1964 Summer | |
| Roberto Guerra | Cuba | Boxing | 2000 Summer | |
| Rodolfo Guerra | Mexico | Wrestling | 1968 Summer | |
| Silvio Guerra | Ecuador | Athletics | 1996 Summer, 2000 Summer, 2004 Summer | |
| Jonathan Guerreiro | Russian Olympic Committee | Figure skating | 2018 Winter | |
| Alberto Guerrero | Puerto Rico | Shooting | 1952 Summer, 1968 Summer | |
| Arturo Guerrero | Mexico | Basketball | 1968 Summer, 1976 Summer | |
| Belem Guerrero | Track cycling, Road cycling | 1996 Summer, 2000 Summer, 2004 Summer | |
| Bernardo Guerrero | Chile | Rowing | 2016 Summer | |
| Carla Guerrero | Football | 2020 Summer | |
| Carlos Guerrero | Mexico | Shooting | 1932 Summer | |
| Eduardo Guerrero | Argentina | Rowing | 1952 Summer | |
| Eric Guerrero | United States | Wrestling | 2004 Summer | |
| Esther Guerrero | Spain | Athletics | 2016 Summer, 2020 Summer, 2024 Summer | |
| Héctor Guerrero | Mexico | Basketball | 1948 Summer, 1952 Summer | |
| Ilse Guerrero | Athletics | 2020 Summer, 2024 Summer | |
| Iván Guerrero | Honduras | Football | 2000 Summer | |
| Jenny Guerrero | Philippines | Swimming | 2000 Summer | |
| Jesús Guerrero | Spain | Handball | 1972 Summer | |
| Manuel Guerrero | Argentina | Basketball | 1948 Summer | |
| Osleni Guerrero | Cuba | Badminton | 2016 Summer | |
| Patricia Guerrero | Peru | Athletics | 1980 Summer | |
| Pere Guerrero | Spain | Canoe slalom | 1992 Summer | |
| Roberto Guerrero | Argentina | Track cycling | 1948 Summer | |
| Rubén Guerrero | El Salvador | Swimming | 1968 Summer | |
| Sébastien Guerrero [ Wikidata ] | France | Shooting | 2024 Summer | |
| Angel Guerreros | Paraguay | Athletics | 1972 Summer | |
| Francisco Güerri | Spain | Football | 1980 Summer | |
| Kamel Guerri | Algeria | Alpine skiing | 1992 Winter | |
| Mourad Guerri | 1992 Winter | |
| Carlos Guerrico | Argentina | Fencing | 1924 Summer | |
| André Guerrier | France | Sailing | 1924 Summer | |
| Guerrinha | Brazil | Basketball | 1988 Summer, 1992 Summer | |
| Giancarlo Guerrini | Italy | Water polo | 1960 Summer, 1964 Summer, 1968 Summer | |
| Hicham El Guerrouj | Morocco | Athletics | 1996 Summer, 2000 Summer, 2004 Summer | |
| Jérôme Guery | Belgium | Equestrian jumping | 2016 Summer, 2020 Summer, 2024 Summer | |
| Mohamed Ben Guesmia | Algeria | Boxing | 1992 Summer | |
| Abdelati El Guesse | Morocco | Athletics | 2016 Summer, 2020 Summer, 2024 Summer | |
| Charlie Guest | Great Britain | Alpine skiing | 2018 Winter, 2022 Winter | |
| David Guest | Australia | Field hockey | 2008 Summer | |
| Freddie Guest | Great Britain | Polo | 1924 Summer | |
| Irene Guest | United States | Swimming | 1920 Summer | |
| Jack Guest | Canada | Rowing | 1928 Summer | |
| Laurence Guest | Great Britain | 1952 Summer | |
| Matthew Guest | Canada | Field hockey | 2016 Summer | |
| Paul Guest | Australia | Rowing | 1960 Summer, 1964 Summer, 1968 Summer | |
| Peter Guest | 1960 Summer | |
| Joan Guetschow | United States | Biathlon | 1992 Winter, 1994 Winter | |
| Mansour Guettaya | Tunisia | Athletics | 1972 Summer | |
| Dumas Guette | Colombia | Football | 1972 Summer | |
| Ana Guevara | Mexico | Athletics | 2000 Summer, 2004 Summer | |
| Armando Guevara | Venezuela | Boxing | 1976 Summer, 1980 Summer | |
| Ena Guevara | Peru | Athletics | 1984 Summer, 1992 Summer | |
| Héctor de Guevara | Football | 1960 Summer | |
| Jesús Guevara | Venezuela | Boxing | 1996 Summer | |
| Manuel Guevara | Road cycling | 1996 Summer, 2000 Summer | |
| Alioune Badara Guèye | Senegal | Basketball | 1968 Summer, 1972 Summer | |
| Amadou Guèye | Judo | 1992 Summer | |
| Awa Guèye | Basketball | 2000 Summer | |
| Daour M'baye Guèye | Athletics | 1964 Summer, 1968 Summer | |
| Ibrahima Guèye | 1976 Summer | |
| Idrissa Gueye | Football | 2012 Summer | |
| Lamine Guèye | Alpine skiing | 1984 Winter, 1992 Winter, 1994 Winter | |
| Magaye Gueye | Football | 2012 Summer | |
| Mohamed Guèye | Table tennis | 2004 Summer | |
| Moustapha Guèye | Wrestling | 1988 Summer | |
| Ndiatte Gueye | Canoe sprint | 2012 Summer | |
| Ousseynou Guèye | Judo | 1984 Summer | |
| Papa Gueye | Football | 2012 Summer | |
| Eya Guezguez | Tunisia | Sailing | 2020 Summer | |
| Sarra Guezguez | 2020 Summer | |
| Charles Guézille | France | Athletics | 1920 Summer | |
| Maurice Gufflet | Sailing | 1900 Summer | |
| Robert Gufflet | 1900 Summer, 1928 Summer | |
| Edith Gufler | Italy | Shooting | 1984 Summer | |
| Frants Gufler | Denmark | Curling | 2002 Winter | |
| Johannes Gufler | Austria | Shooting | 1988 Summer | |
| Aurel Guga | Romania | Football | 1924 Summer | |
| Georgi Gugava | Georgia | Judo | 2000 Summer | |
| Georg Guggemos | Germany | Ice hockey | 1952 Winter | |
| Matthias Guggenberger | Austria | Skeleton | 2010 Winter, 2014 Winter, 2018 Winter | |
| Muriel Guggolz | United States | Fencing | 1932 Summer | |
| Christian Gugler | Switzerland | Athletics | 1988 Summer | |
| Annie Guglia | Canada | Skateboarding | 2020 Summer | |
| Savino Guglielmetti | Italy | Artistic gymnastics | 1932 Summer, 1936 Summer, 1948 Summer | |
| Alejandro Guglielmi | Argentina | Equestrian eventing | 1972 Summer | |
| Gustavo Guglielmone | Track cycling | 1992 Summer | |
| Armin Guhl | Switzerland | Athletics | 1936 Summer | |
| Gui Chaoran | China | Volleyball | 2000 Summer | |
| Isabel Guialo | Angola | Handball | 2012 Summer, 2016 Summer, 2020 Summer | |
| Ronaldo Guiaro | Brazil | Football | 1996 Summer | |
| Brigitte Guibal | France | Canoe slalom | 2000 Summer | |
| Étienne Guibel | Field hockey | 1936 Summer | |
| Apollon Guiber von Greifenfels | Russia | Fencing | 1912 Summer | |
| Gisèle Guibert [ Wikidata ] | France | Artistic gymnastics | 1948 Summer | |
| Ecaterina Guica | Canada | Judo | 2016 Summer, 2020 Summer | |
| Marielle Guichard | France | Road cycling | 1984 Summer | |
| Yann Guichard | Sailing | 2000 Summer | |
| Rianne Guichelaar | Netherlands | Water polo | 2008 Summer | |
| Pierre Guichot | France | Fencing | 1984 Summer, 1988 Summer, 1992 Summer | |
| George Guida | United States | Athletics | 1948 Summer | |
| Maria Guida | Italy | 1996 Summer | |
| Ghazi Guidara | Tunisia | Volleyball | 1996 Summer, 2004 Summer | |
| Anatolie Guidea | Bulgaria | Wrestling | 2012 Summer | |
| Ivan Guidea | Romania | 2016 Summer | |
| Emanuele Guidi | San Marino | Archery | 2012 Summer | |
| Guilherme Guido | Brazil | Swimming | 2008 Summer, 2016 Summer, 2020 Summer | |
| Luigi Guido | Italy | Judo | 1992 Summer, 1996 Summer, 2000 Summer | |
| Reibel Guido | Germany | Water polo | 1992 Summer | |
| Sara Guido | Mexico | Swimming | 1984 Summer | |
| Giachem Guidon | Switzerland | Cross country skiing | 1984 Winter, 1988 Winter, 1992 Winter, 1994 Winter | |
| Carlette Guidry-White | United States | Athletics | 1992 Summer, 1996 Summer | |
| Abraham Gneki Guié | Ivory Coast | Football | 2008 Summer | |
| Jeff Guiel | Canada | Baseball | 2004 Summer | |
| Christian Guiffroy | France | Artistic gymnastics | 1964 Summer, 1968 Summer, 1972 Summer | |
| Martina Guiggi | Italy | Volleyball | 2008 Summer, 2016 Summer | |
| Elodie Guiglion | France | Rugby sevens | 2016 Summer | |
| Charlène Guignard | Italy | Figure skating | 2014 Winter, 2018 Winter, 2022 Winter | |
| Christelle Guignard | France | Alpine skiing | 1984 Winter, 1988 Winter, 1992 Winter | |
| Roger-Claude Guignard | Switzerland | Sailing | 1980 Summer | |
| Nicolas Guigon | France | Athletics | 2004 Summer | |
| Antonin Guigonnat | Biathlon | 2018 Winter | |
| Michaël Guigou | Handball | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Claude Guiguet | Modern pentathlon | 1976 Summer | |
| Lucien Guiguet | 1968 Summer | |
| Brigitte Guigui | Ivory Coast | Handball | 1988 Summer | |
| Patricia Guijarro | Spain | Football | 2024 Summer | |
| Rafael Guijosa | Handball | 1996 Summer, 2000 Summer | |
| Mavis Guilarte | Cuba | Volleyball | 1972 Summer, 1980 Summer | |
| Marie-Pierre Guilbaud | France | Cross country skiing | 1992 Winter | |
| Edgardo Guilbe | Puerto Rico | Athletics | 1988 Summer, 1992 Summer | |
| Guilbert [ Wikidata ] | France | Rowing | 1900 Summer | |
| Christian Guilbert | 1948 Summer | |
| Leandro Guilheiro | Brazil | Judo | 2004 Summer, 2008 Summer, 2012 Summer | |
| Chris Guiliano | United States | Swimming | 2024 Summer | |
| Nicole Guilini | Belgium | 1952 Summer | |
| Guy Guillabert | France | Rowing | 1956 Summer | |
| Robert Guillard | Bobsleigh | 1952 Winter | |
| Ilionis Guillaume | Athletics | 2024 Summer | |
| Sylvain Guillaume | Nordic combined | 1992 Winter, 1994 Winter, 1998 Winter | |
| Max Guilleaume | Germany | Equestrian driving | 1900 Summer | |
| Alexandre Guillemand [ Wikidata ] | France | Fencing | 1900 Summer | |
| Mathias Guillemette | Canada | Track cycling | 2024 Summer | |
| René Guillemin | France | 1924 Summer | |
| Agathe Guillemot | Athletics | 2024 Summer | |
| Joseph Guillemot | 1920 Summer | |
| Fernando Guillén | Spain | Fencing | 1924 Summer | |
| Jorge Guillén | Basketball | 1960 Summer | |
| Madeline Guillén | Dominican Republic | Volleyball | 2024 Summer | |
| Heissler Guillent | Venezuela | Basketball | 2016 Summer | |
| Fred Guillermety | Puerto Rico | Shooting | 1960 Summer, 1964 Summer | |
| Gildas Guillerot | France | Sailing | 1984 Summer | |
| Louise Guillet | Water polo | 2024 Summer | |
| Georges Guillez | Athletics | 1936 Summer | |
| Lucien Guillier | 1952 Summer | |
| Robert Guillin | Basketball | 1952 Summer | |
| Georges Guillon | Athletics | 1920 Summer | |
| Olivier Guillon [ Wikidata ] | Equestrian jumping | 2012 Summer | |
| Guillot [ Wikidata ] | Track cycling | 1900 Summer | |
| Mario Guilloti | Argentina | Boxing | 1968 Summer | |
| Fernand Guillou | France | Basketball | 1948 Summer | |
| Jean Guillou | Artistic gymnastics | 1952 Summer, 1956 Summer | |
| Jean-Marie le Guillou | Sailing | 1972 Summer | |
| Laurence Guillou | Swimming | 1988 Summer | |
| Marcel Guillouet | Athletics | 1924 Summer | |
| Pierre Guilloux | 1920 Summer, 1924 Summer | |
| R. A. M. Guilmart [ Wikidata ] | Art competitions | 1924 Summer | |
| Jonathan Guilmette | Canada | Short track speed skating | 2002 Winter, 2006 Winter | |
| Agberto Guimarães | Brazil | Athletics | 1980 Summer, 1984 Summer, 1988 Summer | |
| Antônio Guimarães | Shooting | 1932 Summer, 1936 Summer, 1948 Summer, 1952 Summer | |
| Bruno Guimarães | Football | 2020 Summer | |
| Darcy Guimarães | Athletics | 1936 Summer | |
| Durval Guimarães | Shooting | 1968 Summer, 1972 Summer, 1976 Summer, 1980 Summer, 1984 Summer | |
| Gabriela Guimarães | Volleyball | 2016 Summer, 2020 Summer, 2024 Summer | |
| Gustavo Guimarães | Water polo | 2016 Summer | |
| Henrique Guimarães | Judo | 1996 Summer, 2000 Summer, 2004 Summer | |
| José Guimarães | Portugal | Fencing | 1992 Summer | |
| José Carlos Guimarães | Angola | Basketball | 1992 Summer, 1996 Summer | |
| Maria Guimarães | Brazil | Swimming | 1976 Summer | |
| Maria Iêda Guimarães | Modern pentathlon | 2020 Summer | |
| Nilo Guimarães | Basketball | 1984 Summer | |
| Oswaldo Guimarães | Handball | 2016 Summer | |
| Plauto Guimarães | Swimming | 1948 Summer | |
| Ricardo Guimarães | Athletics | 1932 Summer | |
| Nadia Guimendego | Central African Republic | Judo | 2024 Summer | |
| Needy Guims | France | Athletics | 1996 Summer, 2000 Summer | |
| Jean Guinard | Art competitions | 1924 Summer | |
| Maurice Guinard | Wrestling | 1924 Summer | |
| Jean-Christophe Guinchard | Switzerland | Triathlon | 2000 Summer | |
| Dante Guindani | Italy | Road cycling | 1920 Summer | |
| Luciana Guindani | Canoe sprint | 1960 Summer | |
| Abdel Moneim El-Guindi | United Arab Republic | Boxing | 1960 Summer | |
| Mohamed El-Guindi | Egypt | Football | 1948 Summer | |
| Brahima Guindo | Mali | Judo | 2000 Summer | |
| Claudio Guindón | Argentina | Rowing | 1984 Summer, 1988 Summer | |
| Cristina Guinea | Spain | Field hockey | 2016 Summer | |
| David Guiney | Ireland | Athletics | 1948 Summer | |
| John Guiney | United States | 1904 Summer | |
| Eusebio Guiñez | Argentina | 1948 Summer | |
| Tom Guinn | Canada | Shooting | 1976 Summer, 1984 Summer | |
| Humphrey Patrick Guinness | Great Britain | Polo | 1936 Summer | |
| Judy Guinness | Fencing | 1932 Summer, 1936 Summer | |
| Georges Guiot [ Wikidata ] | France | Artistic gymnastics | 1908 Summer | |
| José Güipe | Venezuela | Rowing | 2020 Summer | |
| Charles Guiraist | France | Sailing | 1900 Summer | |
| Arella Guirantes | Puerto Rico | Basketball | 2024 Summer | |
| Liliana Guiscardo | Argentina | Swimming | 2008 Summer | |
| Matthew Guise-Brown | South Africa | Field hockey | 2020 Summer, 2024 Summer | |
| Jean-Jacques Guissart | France | Rowing | 1952 Summer | |
| René Guissart | 1952 Summer, 1956 Summer | |
| Enrique Guittens | Venezuela | Weightlifting | 1960 Summer | |
| Jack Guittet | France | Fencing | 1960 Summer, 1964 Summer | |
| Alex Güity | Honduras | Football | 2020 Summer | |
| José Güity | 2008 Summer | |
| Lasha Gujejiani | Georgia | Judo | 2004 Summer, 2008 Summer | |
| Henry Gujer | Switzerland | Basketball | 1948 Summer | |
| Aleksandr Gukov | Belarus | Swimming | 1996 Summer, 2000 Summer | |
| Nepes Gukulow | Turkmenistan | Wrestling | 2000 Summer | |
| Muhammad Gul | Pakistan | 1984 Summer | |
| Ramazan Gül | Turkey | Boxing | 1988 Summer | |
| Yekta Yılmaz Gül | Wrestling | 2004 Summer | |
| László Gula | Hungary | Boxing | 1968 Summer | |
| Leonardo Gula | Argentina | 1936 Summer | |
| George Gulack | United States | Artistic gymnastics | 1932 Summer | |
| Mária Gulácsy | Hungary | Fencing | 1968 Summer | |
| Nikola Gulan | Serbia | Football | 2008 Summer | |
| Bora Gulari | United States | Sailing | 2016 Summer | |
| Ingrid Gulbin | Germany, East Germany | Diving | 1960 Summer, 1964 Summer, 1968 Summer | |
| Ernests Gulbis | Latvia | Tennis | 2008 Summer | |
| Bjørn Gulbrandsen | Norway | Ice hockey | 1952 Winter | |
| Bjørn Oscar Gulbrandsen | Ice hockey, Sailing | 1952 Winter, 1956 Summer | |
| Hans Martin Gulbrandsen | Canoe sprint | 1948 Summer, 1952 Summer | |
| Ingrid Gulbrandsen | Figure skating | 1920 Summer | |
| Jan Gulbrandsen | Athletics | 1960 Summer | |
| Karl Gulbrandsen | Road cycling | 1912 Summer | |
| Per Gulbrandsen | Rowing | 1920 Summer | |
| Ragnhild Gulbrandsen | Football | 2000 Summer | |
| Solveig Gulbrandsen | 2000 Summer, 2008 Summer | |
| Sadi Gülçelik | Turkey | Basketball | 1952 Summer | |
| Bjarne Guldager | Norway | Athletics | 1920 Summer | |
| Holger Guldager | Denmark | Track cycling | 1924 Summer | |
| Mogens Guldberg | Athletics | 1988 Summer | |
| Jesper Guldbrandsen | Field hockey | 1960 Summer | |
| Chas Guldemond | United States | Snowboarding | 2014 Winter | |
| Daniel Guldemont | Belgium | Judo | 1976 Summer | |
| Anton Guldener | Switzerland | Bobsleigh | 1924 Winter | |
| Wolfgang Güldenpfennig | East Germany | Rowing | 1972 Summer, 1976 Summer | |
| Rabia Gülec | Germany | Taekwondo | 2016 Summer | |
| Tahir Güleç | 2016 Summer | |
| Lasha Gulelauri | Georgia | Athletics | 2016 Summer, 2020 Summer | |
| Sibel Güler | Turkey | Taekwondo | 2008 Summer | |
| Şükrü Gülesin | Football | 1948 Summer | |
| Ivan Gulev | Bulgaria | Shooting | 1996 Summer | |
| Spas Gulev | Biathlon | 1992 Winter | |
| Ahmet Gülhan | Turkey | Wrestling | 2008 Summer | |
| Koba Guliashvili | Georgia | 1996 Summer, 2000 Summer | |
| Andrin Gulich | Switzerland | Rowing | 2020 Summer, 2024 Summer | |
| Marie Gülich | Germany | Basketball | 2024 Summer | |
| Faye Gulini | United States | Snowboarding | 2010 Winter, 2014 Winter, 2018 Winter, 2022 Winter | |
| Ekaterina Guliyev | Russia | Athletics | 2012 Summer | |
| Emin Guliyev | Azerbaijan | Swimming | 1996 Summer, 2000 Summer | |
| Ramil Guliyev | Azerbaijan, Turkey | Athletics | 2008 Summer, 2016 Summer, 2020 Summer | |
| Zafar Guliev | Russia | Wrestling | 1996 Summer | |
| Alejandra Gulla | Argentina | Field hockey | 2004 Summer, 2008 Summer | |
| Ragnvald Gullaksen [ Wikidata ] | Norway | Wrestling | 1912 Summer | |
| Lisa Gullberg | Sweden | Sailing | 1992 Summer | |
| Christer Gulldén | Wrestling | 1988 Summer | |
| Isabelle Gulldén | Handball | 2008 Summer, 2012 Summer, 2016 Summer | |
| Tore Gullen | Norway | Cross country skiing | 1980 Winter | |
| Urs Güller | Switzerland | Road cycling | 1992 Summer | |
| Magnus Gullerud | Norway | Handball | 2020 Summer, 2024 Summer | |
| Delmont Gullery | New Zealand | Rowing | 1932 Summer | |
| Anita Gulli | Italy | Alpine skiing | 2022 Winter | |
| Johan Gullichsen | Finland | Sailing | 1964 Summer | |
| Geir Gulliksen | Norway | Equestrian jumping | 2008 Summer, 2020 Summer | |
| Kevin Gulliksen | Handball | 2020 Summer | |
| Rune Gulliksen | Ice hockey | 1988 Winter, 1992 Winter | |
| Victoria Gulliksen | Equestrian jumping | 2024 Summer | |
| Stein Erik Gullikstad | Nordic combined | 1976 Winter | |
| Bill Gulliver | Rhodesia | Shooting | 1960 Summer | |
| Gary Gullock | Australia | Rowing | 1984 Summer | |
| Christer Gullstrand | Sweden | Athletics | 1980 Summer, 1984 Summer | |
| Emma Gullstrand | Diving | 2020 Summer | |
| Siripuch Gulnoi | Thailand | Weightlifting | 2012 Summer, 2016 Summer | |
| Krista Guloien | Canada | Rowing | 2008 Summer, 2012 Summer | |
| Loreta Gulotta | Italy | Fencing | 2016 Summer | |
| Alisher Gulov | Tajikistan | Taekwondo | 2012 Summer | |
| Leonid Gulov | Estonia | Rowing | 2000 Summer, 2004 Summer | |
| József Gulrich | Hungary | Swimming | 1964 Summer | |
| Martha Gultom | Indonesia | 1956 Summer | |
| Ákos Gulyás | Hungary | 1964 Summer | |
| Éva Gulyás | Basketball | 1980 Summer | |
| Ildikó Gulyás | 1980 Summer | |
| Magdolna Gulyás | 1980 Summer | |
| Michelle Gulyás | Modern pentathlon | 2020 Summer, 2024 Summer | |
| Péter Gulyás | Handball | 2012 Summer | |
| Rick Gulyas | Canada | Ski jumping | 1972 Winter | |
| Erzsébet Gulyás-Köteles | Hungary | Artistic gymnastics | 1948 Summer, 1952 Summer, 1956 Summer | |
| Boris Gulyayev | Soviet Union | Speed skating | 1964 Winter | |
| Nikolay Gulyayev | Soviet Union, Unified Team | 1988 Winter, 1992 Winter | |
| Vadim Gulyayev | Soviet Union | Water polo | 1968 Summer, 1972 Summer | |
| Yelena Gulyayeva | Russia | Athletics | 1996 Summer | |
| Ieva Gumbs | Lithuania | 2024 Summer | |
| Mikhail Gumenyak | Ukraine | Cross country skiing | 2006 Winter | |
| Margitta Gummel | Germany, East Germany | Athletics | 1964 Summer, 1968 Summer, 1972 Summer | |
| Beate Gummelt | Germany | 1992 Summer, 1996 Summer, 2000 Summer | |
| Carissa Gump | United States | Weightlifting | 2008 Summer | |
| Max Gumpel | Sweden | Swimming, Water polo | 1908 Summer, 1912 Summer, 1920 Summer | |
| Andreas Gumpold | Austria | Cross country skiing | 1984 Winter | |
| Josef Gumpold | Germany | Nordic combined | 1936 Winter | |
| Arantza Gumucio | Chile | Sailing | 2016 Summer | |
| Begoña Gumucio | 2016 Summer | |
| Esra Gümüş | Turkey | Volleyball | 2012 Summer | |
| Samet Gümüş | Boxing | 2024 Summer | |
| Hernán Gumy | Argentina | Tennis | 1996 Summer | |
| Bediha Gün | Turkey | Wrestling | 2016 Summer | |
| Kristrún Guðnadóttir [ Wikidata ] | Iceland | Cross country skiing | 2022 Winter | |
| Rajalingam Gunaratnam | Malaysia | Athletics | 1968 Summer | |
| John Gunawan | Indonesia | Sailing | | |
| Rudy Gunawan | Badminton | 1992 Summer, 1996 Summer | |
| Suryadi Gunawan | Wrestling | 1988 Summer | |
| Tony Gunawan | Indonesia, United States | Badminton | 2000 Summer, 2012 Summer | |
| Sunil Gunawardene | Sri Lanka | Athletics | 1972 Summer | |
| Damla Günay | Turkey | Archery | 2004 Summer | |
| Dilara Buse Günaydın | Swimming | 2008 Summer, 2012 Summer | |
| Saida Gunba | Soviet Union | Athletics | 1980 Summer | |
| Stoyan Gunchev | Bulgaria | Volleyball | 1980 Summer | |
| Vladimir Gundartsev | Soviet Union | Biathlon | 1968 Winter | |
| Otryadyn Gündegmaa | Mongolia | Shooting | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Tsagaandorjiin Gündegmaa | Artistic gymnastics | 1964 Summer, 1968 Summer | |
| Cai Gundelach | Denmark | Equestrian eventing | 1928 Summer | |
| Alfred Gundersen | Norway | Wrestling | 1912 Summer | |
| Bjørn Gundersen | Athletics | 1948 Summer, 1952 Summer | |
| Carl Gunnar Gundersen | Ice hockey | 1992 Winter | |
| Christopher Gundersen | Sailing | 2008 Summer | |
| Einar Gundersen | Football | 1920 Summer | |
| Einar Gundersen | Wrestling | 1976 Summer | |
| Finn Gundersen | Ice hockey | 1952 Winter | |
| Georg Gundersen | Denmark | Wrestling | 1924 Summer | |
| Gunder Gundersen | Norway | Nordic combined | 1960 Winter | |
| Gunnar Gundersen | Swimming | 1976 Summer | |
| Jacob Gundersen | Wrestling | 1908 Summer | |
| Kaare Gundersen | Boxing | 1948 Summer | |
| Tor Gundersen | Ice hockey | 1964 Winter, 1968 Winter | |
| Trude Gundersen | Taekwondo | 2000 Summer | |
| Foluke Gunderson | United States | Volleyball | 2012 Summer, 2016 Summer, 2020 Summer | |
| Paul Gunderson | Rowing | 1964 Summer | |
| Ryan Gunderson | Ice hockey | 2018 Winter | |
| Jan Gundersrud [ Wikidata ] | Norway | Shooting | 1988 Summer | |
| Hans Gundhus | Athletics | 1924 Summer | |
| Oscar Gundlach-Pedersen | Denmark | Art competitions | 1924 Summer | |
| Hubert Gundolf | Austria | Speed skating | 1976 Winter | |
| Yılmaz Gündüz | Turkey | Basketball | 1952 Summer | |
| Gülşah Günenç | Swimming | 2004 Summer, 2008 Summer | |
| Alpaslan Güneş | Equestrian jumping | 1956 Summer | |
| Viktoria Zeynep Güneş | Swimming | 2016 Summer, 2020 Summer | |
| Zehra Güneş | Volleyball | 2020 Summer, 2024 Summer | |
| Desislav Gunev | Bulgaria | Athletics | 2008 Summer | |
| Fettah Güney | Turkey | Shooting | 1972 Summer | |
| Ghulam Mohiddin Gunga | Afghanistan | Wrestling | 1960 Summer | |
| Adil Güngör | Turkey | 1956 Summer, 1960 Summer | |
| Hasan Güngör | 1960 Summer, 1964 Summer | |
| Nuray Güngör | Weightlifting | 2020 Summer | |
| Rafet Güngör | Judo | 1976 Summer | |
| Paul Gunia | Germany | Athletics | 1908 Summer | |
| Wolfgang Gunkel | East Germany | Rowing | 1968 Summer, 1972 Summer | |
| Yuri Gunko | Ukraine | Ice hockey | 2002 Winter | |
| Adam Gunn | United States | Athletics | 1904 Summer | |
| Chanda Gunn | Ice hockey | |
| Charles Gunn | Great Britain | Athletics | 1920 Summer | |
| Jackie Gunn | Bobsleigh | 2002 Winter, 2006 Winter | |
| Neil Gunn | Canada | Sailing | 1972 Summer | |
| Rachael Gunn | Australia | Breaking | 2024 Summer | |
| Richard Gunn | Great Britain | Boxing | 1908 Summer | |
| Sean Gunn | Zimbabwe | Swimming | 2016 Summer | |
| Erna Sóley Gunnarsdóttir [ Wikidata ] | Iceland | Athletics | 2024 Summer | |
| Carl Gunne | Art competitions | 1936 Summer | |
| Sally Gunnell | Great Britain | Athletics | 1988 Summer, 1992 Summer, 1996 Summer | |
| Roland Gunnesch | Romania | Handball | 1972 Summer, 1976 Summer | |
| Stig-Arne Gunnestad | Norway | Curling | 1998 Winter | |
| Loes Gunnewijk | Netherlands | Road cycling | 2012 Summer | |
| Piet Gunning | Field hockey | 1936 Summer | |
| Haluk Günözgen [ Wikidata ] | Turkey | Road cycling | 1972 Summer | |
| Ella Gunson | New Zealand | Field hockey | 2012 Summer, 2020 Summer | |
| Fritz Gunst | Germany | Water polo | 1928 Summer, 1932 Summer, 1936 Summer | |
| Thomas Gunst | West Germany | Field hockey | 1984 Summer | |
| Ernst von Gunten | Switzerland | Athletics | 1952 Summer | |
| Jules von Gunten | Weightlifting | 1924 Summer | |
| Patrick von Gunten | Ice hockey | 2010 Winter, 2014 Winter | |
| Peter Gunterberg | Sweden | Basketball | 1980 Summer | |
| Jack Günthard | Switzerland | Artistic gymnastics | 1952 Summer | |
| Heinz Günthardt | Tennis | 1988 Summer | |
| Rudolf Günthardt | Equestrian eventing | 1960 Summer | |
| Bert Gunther | Netherlands | Rowing | 1928 Summer | |
| Dettlef Günther | East Germany | Luge | 1976 Winter, 1980 Winter | |
| Doris Günther | Austria | Snowboarding | 2002 Winter, 2006 Winter, 2010 Winter | |
| Ernst Günther | Switzerland | Athletics | 1948 Summer | |
| Jana Günther | Germany | Artistic gymnastics | 1992 Summer | |
| Kelly Gunther | United States | Speed skating | 2014 Winter | |
| Leena Günther | Germany | Athletics | 2012 Summer | |
| Michael Günther | West Germany | Swimming | 1968 Summer, 1972 Summer | |
| Paul Günther | Germany | Diving | 1912 Summer | |
| Roland Günther | West Germany | Track cycling | 1984 Summer | |
| Sabine Günther | Germany | Athletics | 1992 Summer | |
| Silke Günther | Rowing | 2004 Summer | |
| Sarah Günther-Werlein | Football | 2004 Summer | |
| Max Günthör | Volleyball | 2012 Summer | |
| Werner Günthör | Switzerland | Athletics | 1984 Summer, 1988 Summer, 1992 Summer | |
| Michael Güntner | Austria | Ice hockey | 1994 Winter | |
| Guo Ailun | China | Basketball | 2012 Summer, 2016 Summer | |
| Guo Chengjiang | Speed skating | 1980 Winter | |
| Guo Chunfang | Athletics | 2000 Summer | |
| Guo Cui | Artistic swimming | 1996 Summer | |
| Guo Daen | Canoe sprint | 1988 Summer | |
| Guo Dan | Archery | 2008 Summer | |
| Guo Dan | Speed skating | 2018 Winter, 2022 Winter | |
| Guo Dandan | Freestyle skiing | 1998 Winter | |
| Guo Dongling | Cross country skiing | 1998 Winter | |
| Guo Fan | Athletics | 2012 Summer | |
| Guo Hong | Ice hockey | 1998 Winter, 2002 Winter | |
| Guo Huaying | Swimming | 1984 Summer | |
| Jessica Guo | Canada | Fencing | 2020 Summer, 2024 Summer | |
| Guo Jia | China | Softball | 2004 Summer, 2008 Summer | |
| Guo Jianli | Modern pentathlon | 2016 Summer | |
| Guo Jie | Athletics | 1936 Summer | |
| Guo Jingjing | Diving | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer | |
| Guo Kang | Rowing | 2008 Summer | |
| Guo Lei | Judo | 2008 Summer | |
| Guo Li | Artistic swimming | 2016 Summer, 2020 Summer | |
| Guo Lili | Ice hockey | 1998 Winter | |
| Guo Linlin | Rowing | 2020 Summer | |
| Guo Linxian | Artistic gymnastics | 1988 Summer | |
| Guo Linyao | 1992 Summer | |
| Guo Longchen | Road cycling | 1988 Summer | |
| Guo Mei | Rowing | 1988 Summer | |
| Guo Peng | Volleyball | 2008 Summer | |
| Guo Qiqi | Rhythmic gymnastics | 2020 Summer, 2024 Summer | |
| Guo Shasha | 1992 Summer | |
| Guo Shiqiang | Basketball | 2000 Summer, 2004 Summer | |
| Guo Shuang | Track cycling | 2008 Summer, 2012 Summer | |
| Guo Wei | Ice hockey | 1998 Winter | |
| Guo Wei | Short track speed skating | 2002 Winter | |
| Guo Weiyang | Artistic gymnastics | 2012 Summer | |
| Guo Wenjun | Shooting | 2008 Summer, 2012 Summer, 2016 Summer | |
| Guo Xinghong | Road cycling | 1996 Summer | |
| Guo Xinxin | Freestyle skiing | 2002 Winter, 2006 Winter, 2010 Winter | |
| Guo Yijun | Football | 1988 Summer | |
| Guo Yiqi | Fencing | 2020 Summer | |
| Guo Youhua | Baseball | 2008 Summer | |
| Guo Yue | Table tennis | 2004 Summer, 2008 Summer, 2012 Summer | |
| Guo Yufang | Track cycling | 2024 Summer | |
| Guo Zhendong | Badminton | 2008 Summer, 2012 Summer | |
| Guo Zhengxin | Figure skating | 1998 Winter | |
| Boniface Guobadia | Nigeria | Athletics | 1952 Summer | |
| Guðmundur Guðmundsson | Iceland | Alpine skiing | 1948 Winter | |
| Abhinn Shyam Gupta | India | Badminton | 2004 Summer | |
| Gupta Bahadur | Cross country skiing | 2006 Winter | |
| Brendan Guraliuk | Canada | Field hockey | 2020 Summer | |
| Adalbert Gurath Jr. | Romania | Fencing | 1960 Summer | |
| Adalbert Gurath Sr. | 1952 Summer | |
| Aisha Gurbanli | Azerbaijan | Judo | 2020 Summer | |
| Anna Gurbanova | Rhythmic gymnastics | 2004 Summer | |
| Eduardo Gurbindo | Spain | Handball | 2012 Summer, 2020 Summer | |
| Gurbir Singh Sandhu | India | Shooting | 1976 Summer | |
| Fethi Gürcan | Turkey | Equestrian eventing | 1956 Summer | |
| Kemal Arda Gürdal | Swimming | 2012 Summer | |
| Macit Gürdal | Football | 1952 Summer | |
| Arif Gürdenlı | Sailing | 1992 Summer | |
| Ranjit Singh Gurdit | Malaysia | Field hockey | 1964 Summer | |
| Katelin Guregian | United States | Rowing | 2016 Summer, 2020 Summer | |
| Nareg Guregian | 2016 Summer | |
| Lorena Guréndez | Spain | Rhythmic gymnastics | 1996 Summer, 2000 Summer | |
| Ümitcan Güreş | Turkey | Swimming | 2020 Summer | |
| Gizem Güreşen | Volleyball | 2012 Summer | |
| Nikola Ǵuretanoviḱ | North Macedonia | Swimming | 2024 Summer | |
| Boris Gurevich | Soviet Union | Wrestling | 1952 Summer | |
| Boris Gurevich | 1968 Summer | |
| Lyudmila Gureyeva | Volleyball | 1964 Summer | |
| Mehmet Gürgen | Turkey | Boxing | 1992 Summer | |
| Lyuben Gurgushinov | Bulgaria | Athletics | 1964 Summer | |
| Elis Guri | Albania, Bulgaria | Wrestling | 2008 Summer, 2012 Summer, 2016 Summer | |
| Qëndrim Guri | Kosovo | Road cycling | 2016 Summer | |
| György Gurics | Hungary | Wrestling | 1952 Summer, 1956 Summer, 1960 Summer | |
| Lyubov Gurina | Soviet Union, Unified Team | Athletics | 1988 Summer, 1992 Summer | |
| Gréta Gurisatti | Hungary | Water polo | 2020 Summer, 2024 Summer | |
| Cevat Gürkan | Turkey | Equestrian jumping | 1936 Summer | |
| Pavel Gurkin | Russia | Shooting | 2008 Summer | |
| Alexey Gurman | Kazakhstan | Diving | 2000 Summer | |
| Hilda Gurney | United States | Equestrian dressage | 1976 Summer, 1984 Summer | |
| Andrey Gurov | Kazakhstan | Shooting | 2004 Summer | |
| József Gurovits | Hungary | Canoe sprint | 1952 Summer | |
| Donna Gurr | Canada | Swimming | 1972 Summer | |
| Mark Gurr | Zimbabwe | Tennis | 1988 Summer | |
| Yuli Gurriel | Cuba | Baseball | 2004 Summer, 2008 Summer | |
| Eva Gurrola | Mexico | Weightlifting | 2016 Summer | |
| Emilio Gurruchaga | Spain | Sailing | 1960 Summer | |
| Siegfried Gurschler | Austria | Shooting | 1952 Summer | |
| Daniel Gürschner | Germany | Judo | 2000 Summer | |
| Herbert Gurschner | Great Britain | Art competitions | 1948 Summer | |
| Louisa Gurski | Canoe sprint | 2012 Summer, 2016 Summer | |
| Bedri Gürsoy | Turkey | Football | 1924 Summer | |
| Hüseyin Gürsoy | Wrestling | 1968 Summer | |
| Olivia Gürth | Germany | Athletics | 2024 Summer | |
| Hiltrud Gürtler | West Germany | Rowing | 1976 Summer | |
| Georgiy Gurtsiev [ Wikidata ] | Independent Olympians | Taekwondo | 2024 Summer | |
| Lasha Guruli | Georgia | Boxing | 2024 Summer | |
| Dilip Gurumurthy | India | Basketball | 1980 Summer | |
| Chitra Bahadur Gurung | Nepal | Swimming | 2000 Summer | |
| Jodha Gurung | Athletics | 1984 Summer | |
| Nishma Gurung | Swimming | 1996 Summer | |
| Ram Prasad Gurung | Boxing | 1964 Summer | |
| Sirish Gurung | Swimming | 2016 Summer | |
| Lyudmila Guryeva | Kazakhstan | Biathlon | 1998 Winter | |
| Polina Guryeva | Turkmenistan | Weightlifting | 2020 Summer | |
| Yelena Guryeva | Soviet Union | Field hockey | 1980 Summer | |
| Alexei Guryshev | Ice hockey | 1956 Winter | |
| Nikolay Gusakov | Nordic combined | 1956 Winter, 1960 Winter, 1964 Winter | |
| Maria Gusakova | Cross country skiing | 1960 Winter, 1964 Winter | |
| Alexei Gusarov | Soviet Union, Russia | Ice hockey | 1988 Winter, 1998 Winter | |
| Rokas Guščinas | Lithuania | Artistic gymnastics | 2012 Summer | |
| Bernd Guse | West Germany | Canoe sprint | 1968 Summer, 1972 Summer | |
| Bruno Guse | Germany | Boxing | 1960 Summer, 1964 Summer | |
| Udo Guse | Weightlifting | 1992 Summer | |
| Jens Gusek | East Germany | Fencing | 1988 Summer | |
| Valentino Guseli | Australia | Snowboarding | 2022 Winter | |
| Ilona Gusenbauer | Austria | Athletics | 1968 Summer, 1972 Summer | |
| Gheorghe Gușet | Romania | 1992 Summer, 2000 Summer, 2004 Summer | |
| Aleksandr Gusev | Soviet Union | Field hockey | 1980 Summer | |
| Alexander Gusev | Ice hockey | 1976 Winter | |
| Eduard Gusev | Track cycling | 1956 Summer | |
| Nikita Gusev | Russian Olympic Committee | Ice hockey | 2018 Winter, 2022 Winter | |
| Oleg Gusev | Canoe sprint | 2020 Summer | |
| Sergey Gusev | Soviet Union | Swimming | 1968 Summer | |
| Anna Guseva | Russia | Marathon swimming | 2012 Summer | |
| Elina Guseva | Soviet Union, Unified Team | Handball | 1988 Summer, 1992 Summer | |
| Klara Guseva | Soviet Union | Speed skating | 1960 Winter, 1964 Winter | |
| Natalia Guseva | Russia | Biathlon | 2006 Winter | |
| Vadim Gusevas | Lithuania | Cross country skiing | 2002 Winter | |
| Stephan Güsgen | West Germany | Swimming | 1988 Summer | |
| Georgy Gushchenko | Soviet Union | Rowing | 1952 Summer, 1956 Summer | |
| Aleksey Gushchin | Shooting | 1960 Summer | |
| Eduard Gushchin | Athletics | 1968 Summer | |
| Yuliya Gushchina | Russia | 2008 Summer, 2012 Summer | |
| Viktor Gushchinskiy | 2004 Summer | |
| Lidiya Gusheva | Bulgaria | 1980 Summer | |
| Kōji Gushiken | Japan | Artistic gymnastics | 1984 Summer | |
| Kosei Gushiken | Athletics | 1972 Summer | |
| Brad Gushue | Canada | Curling | 2006 Winter, 2022 Winter | |
| Tatiana Gusin | Greece | Athletics | 2024 Summer | |
| Ravil Gusmanov | Russia | Ice hockey | 1994 Winter | |
| Rebeca Gusmão | Brazil | Swimming | 2004 Summer | |
| Vanessa Gusméroli | France | Figure skating | 1998 Winter, 2002 Winter | |
| Yury Gusov | Soviet Union | Wrestling | 1972 Summer | |
| René Gusperti | Italy | Swimming | 1992 Summer, 1996 Summer | |
| Efrain Gusquiza | Peru | Weightlifting | 1968 Summer | |
| Alistair Guss | Australia | Alpine skiing | 1984 Winter | |
| Antony Guss | 1980 Winter | |
| Lloyd Guss | Canada | Athletics, Bobsleigh | 1984 Summer, 1988 Winter | |
| Marilla Guss | Australia | Alpine skiing | 1984 Winter | |
| Oliver Gussenberg | Germany | Judo | 2000 Summer, 2004 Summer | |
| P. Gussmann | United States | Artistic gymnastics | 1904 Summer | |
| Reinhard Gust | East Germany | Rowing | 1972 Summer | |
| Prince Gustaf Adolf, Duke of Västerbotten | Sweden | Equestrian jumping | 1936 Summer | |
| Fathur Gustafian | Indonesia | Shooting | 2024 Summer | |
| Eygló Ósk Gústafsdóttir | Iceland | Swimming | 2012 Summer, 2016 Summer | |
| Bengt Gustafson | Sweden | Volleyball | 1988 Summer | |
| Elisabet Gustafson | Curling | 1998 Winter, 2002 Winter | |
| Jonathan Gustafson | United States | Luge | 2022 Winter | |
| Megan Gustafson | Spain | Basketball | 2024 Summer | |
| Tomas Gustafson | Sweden | Speed skating | 1980 Winter, 1984 Winter, 1988 Winter, 1992 Winter | |
| Anders Gustafsson | Canoe sprint | 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| August Gustafsson | Tug of war | 1912 Summer | |
| Aulo Gustafsson | Swimming | 1928 Summer | |
| Bengt-Åke Gustafsson | Ice hockey | 1992 Winter | |
| Birger Gustafsson | Sailing | 1908 Summer | |
| Bo Gustafsson | Athletics | 1980 Summer, 1984 Summer, 1988 Summer | |
| Christina Gustafsson | Shooting | 1984 Summer | |
| Emil Gustafsson [ Wikidata ] | 1912 Summer | |
| Erik Gustafsson | Finland | Athletics | 1972 Summer | |
| Erik Gustafsson | Sweden | Ice hockey | 2018 Winter | |
| Erkki Gustafsson | Finland | Football | 1936 Summer | |
| Fredrik Gustafsson | Sweden | Bobsleigh | 1994 Winter | |
| Helge Gustafsson | Artistic gymnastics | 1920 Summer | |
| Janne Gustafsson | Shooting | 1908 Summer | |
| Karl Gustafsson | Football | 1908 Summer, 1912 Summer, 1920 Summer | |
| Lars Gustafsson | Wrestling | 1988 Summer | |
| Lars-Eric Gustafsson | Rowing | 1960 Summer | |
| Lars-Erik Gustafsson | Athletics | 1964 Summer | |
| Linda Gustafsson | Ice hockey | 1998 Winter | |
| Madeleine Gustafsson | Handball | 2008 Summer | |
| Magnus Gustafsson | Tennis | 1992 Summer, 1996 Summer | |
| Malin Gustafsson | Ice hockey | 1998 Winter | |
| Margareta Gustafsson | Shooting | 1984 Summer | |
| Marianne Gustafsson | Swimming | 1928 Summer | |
| Mats Gustafsson [ Wikidata ] | Road cycling | 1980 Summer | |
| Mattias Gustafsson | Handball | 2012 Summer | |
| Ragnar Gustafsson | Equestrian eventing | 1960 Summer | |
| Rolf Gustafsson | Boxing | 1928 Summer | |
| Thomas Gustafsson | Bobsleigh | 1972 Winter | |
| Tina Gustafsson | Swimming | 1980 Summer | |
| Toini Gustafsson | Cross country skiing | 1964 Winter, 1968 Winter | |
| Tore Gustafsson | Athletics | 1988 Summer, 1992 Summer, 1996 Summer | |
| Ulf Gustafsson | Rowing | 1960 Summer | |
| Abby Gustaitis | United States | Rugby sevens | 2020 Summer | |
| Renata Gustaitytė | Lithuania | Athletics | 2000 Summer | |
| Felipe Gustavo | Brazil | Skateboarding | 2020 Summer, 2024 Summer | |
| Roseli Gustavo | Basketball | 1996 Summer | |
| Jan Erik Gustavsen | Norway | Road cycling | 1968 Summer | |
| Linda Gustavson | United States | Swimming | 1968 Summer | |
| Bengt Gustavsson | Sweden | Football | 1952 Summer | |
| Björgvin Páll Gústavsson | Iceland | Handball | 2008 Summer, 2012 Summer | |
| Carina Gustavsson | Sweden | Rowing | 1984 Summer, 1988 Summer | |
| Erik Gustavsson | Cross country skiing | 1980 Winter | |
| Ingrid Gustavsson | Swimming | 1968 Summer | |
| Jonas Gustavsson | Ice hockey | 2010 Winter | |
| Karl-Johan Gustavsson | Wrestling | 1984 Summer | |
| Martin Gustavsson | Swimming | 2000 Summer, 2004 Summer | |
| Gustav Gustenau | Austria | Modern pentathlon | 2020 Summer | |
| Bridgette Gusterson | Australia | Water polo | 2000 Summer | |
| Maxim Gustik | Belarus | Freestyle skiing | 2018 Winter, 2022 Winter | |
| Marcel Gustin | Belgium | Athletics | 1920 Summer | |
| Ronan Gustin | France | Fencing | 2020 Summer | |
| Valentina Gustin | Croatia | Shooting | 2016 Summer | |
| Agnese Gustmane | Latvia | Tennis | 1992 Summer | |
| Gerhard Gustmann | Germany | Rowing | 1936 Summer | |
| Volodymir Gustov | Ukraine | Road cycling | 2000 Summer | |
| Hans Gut | Switzerland | Sailing | 1972 Summer | |
| Karel Gut | Czechoslovakia | Ice hockey | 1952 Winter, 1956 Winter, 1960 Winter | |
| Zbigniew Gut | Poland | Football | 1972 Summer | |
| Lara Gut-Behrami | Switzerland | Alpine skiing | 2014 Winter, 2018 Winter, 2022 Winter | |
| Les Gutches | United States | Wrestling | 1996 Summer | |
| Eddi Gutenkauf | Luxembourg | Fencing | 1960 Summer | |
| Katharina Gutensohn | Germany, Austria | Alpine skiing, Freestyle skiing | 1992 Winter, 1994 Winter, 1998 Winter, 2010 Winter | |
| Jolanio Guterres [ Wikidata ] | Timor-Leste | Swimming | 2024 Summer | |
| Lionel Guterres | Hong Kong | Field hockey | 1964 Summer | |
| Alfred Guth | Austria | Modern pentathlon | 1936 Summer | |
| Fernand Guth | Luxembourg | Football | 1952 Summer | |
| Guillaume Guth [ Wikidata ] | France | Swimming | 2024 Summer | |
| Thorstein Guthe | Norway | Fencing | 1936 Summer | |
| Karin Guthke | East Germany | Diving | 1976 Summer, 1980 Summer | |
| George Guthrie | United States | Athletics | 1924 Summer | |
| Diane Guthrie-Gresham | Jamaica | 1992 Summer, 1996 Summer | |
| Jennifer Gutiérrez Bermejo | Spain | Handball | 2020 Summer, 2024 Summer | |
| Allan Gutiérrez Castro | Honduras | Swimming | 2012 Summer, 2016 Summer | |
| Javier Gutiérrez Cuevas | Spain | Cross country skiing | 2010 Winter, 2014 Winter | |
| Juan Jesús Gutiérrez Cuevas | 1992 Winter, 1994 Winter, 1998 Winter, 2002 Winter, 2006 Winter | |
| Adair Prieto | Mexico | Cycling mountain bike | 2024 Summer | |
| Ana Gutiérrez | Virgin Islands | Athletics | 1992 Summer | |
| Arturo Gutiérrez | Mexico | Judo | 1996 Summer | |
| Augusto Gutiérrez | Venezuela | Fencing | 1952 Summer, 1960 Summer | |
| Carlos Gutiérrez | Mexico | Football | 1964 Summer | |
| Diego Gutiérrez | Argentina | Volleyball | 2004 Summer | |
| Eddy Gutiérrez | Cuba | Athletics | 1976 Summer | |
| Elias Gutiérrez | Colombia | 1936 Summer | |
| Érick Gutiérrez | Mexico | Football | 2016 Summer | |
| Florencia Gutiérrez | Argentina | Sailing | 2008 Summer | |
| Francisco Gutiérrez | Colombia | Athletics | 1964 Summer | |
| Giancarlo Gutierrez | Italy | Equestrian eventing | 1956 Summer | |
| Gualberto Gutiérrez | Uruguay | Boxing | 1960 Summer | |
| Guillermo Gutiérrez | Venezuela | Athletics | 1952 Summer | |
| Guillermo Gutiérrez | Mexico | Road cycling | 1984 Summer, 1988 Summer | |
| Gustavo Gutiérrez | Venezuela | Fencing | 1952 Summer | |
| Gustavo Gutiérrez | Ecuador | Athletics | 1968 Summer | |
| Henri Gutierrez [ Wikidata ] | France | 1908 Summer | |
| Hernán Gutiérrez | Colombia | Boxing | 1984 Summer | |
| Humberto Gutiérrez | Mexico | Field hockey | 1968 Summer | |
| Ignacio Gutiérrez | Swimming | 1932 Summer | |
| Israel Gutierrez [ Wikidata ] | El Salvador | Shooting | 2024 Summer | |
| Iván Gutiérrez | Spain | Road cycling | 2004 Summer | |
| Jennifer Gutierrez | United States | Triathlon | 2000 Summer | |
| Jorge Gutiérrez | Cuba | Boxing | 2000 Summer | |
| José Gutiérrez | Venezuela | Sailing | 2016 Summer | |
| Juan Jesús Gutiérrez | Mexico | Athletics | 1992 Summer | |
| Juan Pedro Gutiérrez | Argentina | Basketball | 2008 Summer, 2012 Summer | |
| Julia Gutiérrez | Mexico | Rhythmic gymnastics | 2024 Summer | |
| Julián Gutiérrez [ Wikidata ] | Argentina | Shooting | 2024 Summer | |
| Karla Gutiérrez | Mexico | Sailing | 1992 Summer | |
| Leonardo Gutiérrez | Argentina | Basketball | 2004 Summer, 2008 Summer, 2012 Summer | |
| Long Gutiérrez | Mexico | Swimming | 2016 Summer | |
| Magdiel Gutiérrez | Nicaragua | Wrestling | 1992 Summer | |
| Manuel Gutiérrez | Panama | Swimming | 1984 Summer, 1988 Summer | |
| Miguel Gutiérrez | Spain | Football | 2024 Summer | |
| Mireia Gutiérrez | Andorra | Alpine skiing | 2010 Winter, 2014 Winter, 2018 Winter | |
| Nancy Gutiérrez | Mexico | Football | 2004 Summer | |
| Noel Gutiérrez | Field hockey | 1968 Summer, 1972 Summer | |
| Pascual Gutiérrez | Athletics | 1936 Summer | |
| Rocío Gutiérrez | Spain | Field hockey | 2016 Summer | |
| Rosa Gutiérrez | Mexico | Diving | 1948 Summer | |
| Saúl Gutiérrez | Taekwondo | 2016 Summer | |
| Teófilo Gutiérrez | Colombia | Football | 2016 Summer | |
| Tomás Gutiérrez | Puerto Rico | Basketball | 1964 Summer, 1968 Summer | |
| Tonatiuh Gutiérrez | Mexico | Swimming | 1948 Summer, 1952 Summer | |
| Łukasz Gutkowski | Poland | Modern pentathlon | 2020 Summer, 2024 Summer | |
| Piotr Gutman | Boxing | 1964 Summer | |
| Ernests Gūtmanis | Latvia | 1924 Summer | |
| Egon Gutmann | Germany | Art competitions | 1936 Summer | |
| Lara Naki Gutmann | Italy | Figure skating | 2022 Winter | |
| Wojciech Gutorski | Poland | Rowing | 2004 Summer, 2008 Summer, 2012 Summer | |
| Bob Gutowski | United States | Athletics | 1956 Summer | |
| Jacek Gutowski | Poland | Weightlifting | 1988 Summer | |
| Michał Gutowski | Equestrian jumping | 1936 Summer | |
| Gatis Gūts | Latvia | Bobsleigh | 2002 Winter, 2006 Winter | |
| Torsten Gutsche | Germany | Canoe sprint | 1992 Summer, 1996 Summer | |
| Tatiana Gutsu | Unified Team | Artistic gymnastics | 1992 Summer | |
| Romuald Gutt | Poland | Art competitions | 1936 Summer | |
| Jwala Gutta | India | Badminton | 2012 Summer, 2016 Summer | |
| Claire Guttenstein | Belgium | Swimming | 1912 Summer | |
| Jeff Gutteridge | Great Britain | Athletics | 1976 Summer, 1984 Summer | |
| Albert Gutterson | United States | 1912 Summer | |
| August Güttinger | Switzerland | Artistic gymnastics | 1924 Summer, 1928 Summer | |
| John Güttke | Sweden | Biathlon | 1964 Winter | |
| Károly Güttler | Hungary | Swimming | 1988 Summer, 1992 Summer, 1996 Summer, 2000 Summer | |
| Béla Guttmann | Football | 1924 Summer | |
| David Guttman | Sweden | Athletics | 1912 Summer | |
| Wilhelm Guttmann | Germany | Art competitions | 1932 Summer | |
| Oscar Guttormsen | Norway | Athletics | 1908 Summer | |
| Per Willy Guttormsen | Speed skating | 1968 Winter, 1972 Winter | |
| Simen Guttormsen | Athletics | 2024 Summer | |
| Sondre Guttormsen | 2020 Summer, 2024 Summer | |
| Bruno Guttowski | Germany | Ice hockey | 1956 Winter | |
| Andrei Guțu | Moldova | Weightlifting | 2008 Summer | |
| Octavian Guțu | Swimming | 2004 Summer | |
| Jean Gutweniger | Switzerland | Artistic gymnastics | 1924 Summer | |
| Bruno Gutzeit | France | Swimming | 1988 Summer, 1992 Summer | |
| Siegmar Gutzeit | East Germany | Fencing | 1980 Summer | |
| Tilo Gutzeit | Germany | Figure skating | 1956 Winter, 1960 Winter | |
| Vadym Gutzeit | Unified Team, Ukraine | Fencing | 1992 Summer, 1996 Summer, 2000 Summer | |
| Döndü Güvenç | Turkey | Taekwondo | 2000 Summer | |
| Gizem Güvenç | Swimming | 2024 Summer | |
| Tuğba Güvenç | Athletics | 2016 Summer | |
| Pavel Guvorsky [ Wikidata ] | Russia | Fencing | 1912 Summer | |
| Fabrice Guy | France | Nordic combined | 1988 Winter, 1992 Winter, 1994 Winter, 1998 Winter | |
| Francis Guy | Great Britain | Road cycling | 1912 Summer | |
| Gawain Guy | Jamaica | Athletics | 1984 Summer | |
| James Guy | Great Britain | Swimming | 2016 Summer, 2020 Summer, 2024 Summer | |
| Pierre Guy | France | Shooting | 1960 Summer, 1964 Summer | |
| Robert Guy | Trinidad and Tobago | Athletics | 1996 Summer | |
| Ronald Guy | Great Britain | Shooting | 1952 Summer | |
| Alexandre Guyader | France | Sailing | 2000 Summer | |
| Joseph Guyader [ Wikidata ] | Track cycling | 1908 Summer | |
| Hubert Guyard | 1928 Summer | |
| Astrid Guyart | Fencing | 2012 Summer, 2016 Summer, 2020 Summer | |
| Brice Guyart | 2000 Summer, 2004 Summer, 2008 Summer | |
| Andrew Guyda | United States | Football | 1936 Summer | |
| Denis Guye | Great Britain | Rowing | 1928 Summer | |
| Alexandre Guyodo | France | Athletics | 1948 Summer | |
| Adrien Guyon | Fencing | 1900 Summer | |
| Jean-Jacques Guyon | Equestrian eventing | 1968 Summer | |
| Lionel Guyon | 2012 Summer | |
| Bernard Guyot | Road cycling | 1964 Summer | |
| N. Guyot [ Wikidata ] | Shooting | 1900 Summer | |
| René Guyot | Belgium | 1900 Summer | |
| Sarah Guyot | France | Canoe sprint | 2012 Summer, 2016 Summer, 2020 Summer | |
| Sébastienne Guyot | Athletics | 1928 Summer | |
| Jean Van Guysse | Belgium | Artistic gymnastics | 1908 Summer, 1920 Summer | |
| Scott Guyton | New Zealand | Road cycling | 1996 Summer, 2000 Summer | |
| Denton Guy-Williams | Sierra Leone | Athletics | 1992 Summer | |
| Brad Guzan | United States | Football | 2008 Summer | |
| Miroslav Guzdek | Czech Republic | Athletics | 2004 Summer | |
| Ecem Güzel | Turkey | Sailing | 2020 Summer, 2024 Summer | |
| Peter Guzelj | Yugoslavia | Canoe slalom | 1972 Summer | |
| Elisabeta Guzganu-Tufan | Romania | Fencing | 1984 Summer, 1988 Summer, 1992 Summer | |
| Anastasia Guzhenkova | Russian Olympic Committee | Swimming | 2020 Summer | |
| Blanka Guzi | Hungary | Modern pentathlon | 2024 Summer | |
| Julia Guzieva | Russian Olympic Committee | Curling | 2018 Winter | |
| Grzegorz Guzik | Poland | Biathlon | 2014 Winter, 2018 Winter, 2022 Winter | |
| Krystyna Guzik | 2006 Winter, 2010 Winter, 2014 Winter, 2018 Winter | |
| Alejandro Guzmán | Peru | Football | 1960 Summer | |
| Alejandro Guzmán | Mexico | Basketball | 1968 Summer | |
| Alfredo Guzmán | Swimming | 1960 Summer, 1964 Summer | |
| Angel Guzman | Shooting | 1984 Summer | |
| Berenice Guzmán | Artistic swimming | 1996 Summer | |
| Eliazar Guzmán | Chile | Shooting | 1956 Summer | |
| Felipe Guzmán | Mexico | Wrestling | 1996 Summer | |
| Francisco Guzman | Dominican Republic | Weightlifting | 1988 Summer | |
| Jeison Guzmán | Baseball | 2020 Summer | |
| Joan Guzmán | Boxing | 1996 Summer | |
| Jonathan de Guzmán | Netherlands | Football | 2008 Summer | |
| José Guzmán | Peru | Basketball | 1964 Summer | |
| José Guzmán | Venezuela | Boxing | 1992 Summer | |
| José Miguel Guzman | Dominican Republic | Weightlifting | 1988 Summer | |
| Julio Guzman | Puerto Rico | Boxing | 1976 Summer | |
| Lucas Guzmán | Argentina | Taekwondo | 2020 Summer, 2024 Summer | |
| Luis Guzmán | Mexico | Water polo | 1968 Summer | |
| Manuel Guzmán | Puerto Rico | Swimming | 1988 Summer, 1992 Summer | |
| Manuel Guzmán [ Wikidata ] | Dominican Republic | Baseball | 1992 Summer | |
| Raúl Guzmán | Mexico | Swimming | 1960 Summer | |
| Sergio Guzmán | Chile | Athletics | 1948 Summer | |
| Sidney Guzman | Peru | Wrestling | 2004 Summer | |
| Víctor Guzmán | Mexico | Football | 2016 Summer | |
| Violeta Guzmán | Athletics | 2004 Summer | |
| Washington Guzmán | Chile | Swimming | 1936 Summer | |
| Wilfredo Guzman | Puerto Rico | Boxing | 1976 Summer | |
| Yusneylys Guzmán | Cuba | Wrestling | 2020 Summer, 2024 Summer | |
| Aleksandr Guzov | Belarus | 1996 Summer, 2000 Summer | |
| Anna Guzowska | Poland | Athletics | 2004 Summer | |
| Małgorzata Guzowska | 1980 Summer | |
| Giedrius Gužys | Lithuania | Sailing | 2000 Summer, 2004 Summer | |
| Michela Guzzetti | Italy | Swimming | 2012 Summer | |
| Patsy Guzzo | Canada | Ice hockey | 1948 Winter | |
| Chiara Guzzonato | Italy | Basketball | 1980 Summer | |
| Nodar Gvakhariya | Soviet Union | Water polo | 1956 Summer | |
| David Gvantseladze | Wrestling | 1964 Summer | |
| Beka Gviniashvili | Georgia | Judo | 2016 Summer | |
| Oleksandr Gvozdyk | Ukraine | Boxing | 2012 Summer | |
| Gwag Yong-ja | South Korea | Volleyball | 1964 Summer | |
| Gwak Dong-han | Judo | 2016 Summer, 2020 Summer | |
| Kwak Hyun-chae | Basketball | 1968 Summer | |
| Gwak Kyung-keun | Football | 1992 Summer | |
| Kim Gwang-sok [ Wikidata ] | North Korea | 1976 Summer | |
| Jazmon Gwathmey | Puerto Rico | Basketball | 2020 Summer | |
| Edwige Gwend | Italy | Judo | 2012 Summer, 2016 Summer | |
| Josef Gwerder | Switzerland | Athletics | 1968 Summer | |
| Donald Gwinn | United States | 1928 Summer | |
| Giulia Gwinn | Germany | Football | 2024 Summer | |
| Magdalena Gwizdoń | Poland | Biathlon | 2006 Winter, 2010 Winter, 2014 Winter, 2018 Winter | |
| Gwon Han-na | South Korea | Handball | 2012 Summer, 2016 Summer | |
| Gwon Ik-hyeon | Road cycling | 1948 Summer, 1952 Summer | |
| Gwon Sang-won | Swimming | 1988 Summer | |
| Gwon Seong-nak | Athletics | 1988 Summer | |
| Gwon Sun-cheon | Speed skating | 2006 Winter | |
| Gwon Sun-geun | Swimming | 1988 Summer | |
| Horace Gwynne | Canada | Boxing | 1932 Summer | |
| Beatrice Gyaman | Ghana | Athletics | 2016 Summer | |
| Asamoah Gyan | Football | 2004 Summer | |
| Baffour Gyan | 2004 Summer | |
| János Gyáni | Hungary | Judo | 1980 Summer, 1988 Summer | |
| Ileana Gyarfaș | Romania | Artistic gymnastics | 1952 Summer | |
| Andrea Gyarmati | Hungary | Swimming | 1968 Summer, 1972 Summer | |
| Béla Gyarmati | Fencing | 1964 Summer | |
| Dezső Gyarmati | Water polo | 1948 Summer, 1952 Summer, 1956 Summer, 1960 Summer, 1964 Summer | |
| Olga Gyarmati | Athletics | 1948 Summer, 1952 Summer, 1956 Summer | |
| Emanuil Gyaurov | Bulgaria | Basketball | 1960 Summer | |
| Mathias Gydesen | Denmark | Swimming | 2012 Summer | |
| Gyula Gyenes | Hungary | Athletics | 1936 Summer | |
| Leila Gyenesei | Cross country skiing, Modern pentathlon | 2006 Winter, 2008 Summer | |
| Valéria Gyenge | Swimming | 1952 Summer, 1956 Summer | |
| Brian Gyetko | Canada | Tennis | 1992 Summer | |
| Nicolas Gygax | Switzerland | Freestyle skiing | 2018 Winter, 2022 Winter | |
| Aye Maung Gyi | Myanmar | Football | 1972 Summer | |
| Valéria Gyimesi | Hungary | Rowing | 1976 Summer, 1980 Summer | |
| Vilhelm Gylche | Denmark | Athletics | 1912 Summer | |
| George Gyles | Canada | Sailing | 1932 Summer | |
| Gylfi Gylfason | Iceland | Handball | 2004 Summer | |
| Gerhard Gyllenhammar | Sweden | Art competitions | 1936 Summer | |
| Axel Gyllenkrok | Shooting | 1912 Summer | |
| Ebbe Gyllenstierna | Modern pentathlon | 1936 Summer | |
| Axel-Erik Gyllenstolpe | Athletics | 1920 Summer | |
| Jane Gylling | Swimming | 1920 Summer, 1924 Summer | |
| Kate Gynther | Australia | Water polo | 2004 Summer, 2008 Summer, 2012 Summer | |
| Pyon Song Gyong [ Wikidata ] | North Korea | Table tennis | 2024 Summer | |
| Kim Gyong-hui [ Wikidata ] | Road cycling | 1992 Summer | |
| András Gyöngyösi | Hungary | Water polo | 1988 Summer, 1992 Summer, 1996 Summer | |
| László Gyöngyösi | Swimming | 1952 Summer | |
| Anikó Gyöngyössy | Water polo | 2020 Summer | |
| Mihail Gyonin | Bulgaria | Football | 1968 Summer | |
| József Gyönyörű | Hungary | Shooting | 1960 Summer | |
| Lívia Győrbiró | Sailing | 2004 Summer | |
| Anett Györe | Water polo | 2004 Summer, 2008 Summer | |
| Ion Györffi | Romania | Boxing | 1972 Summer | |
| Dóra Győrffy | Hungary | Athletics | 2000 Summer | |
| Imre Győrffy | Track cycling | 1936 Summer | |
| Irén Győrffy | Swimming | 1936 Summer | |
| Sándor Győrffy | Handball | 1992 Summer | |
| Endre Győrfi | Water polo | 1948 Summer | |
| Mónika György | Romania | Cross country skiing | 2006 Winter, 2010 Winter | |
| Réka György | Hungary | Swimming | 2016 Summer | |
| Ferenc Györgyei | Wrestling | 1924 Summer | |
| Károly Győry | Rowing | 1936 Summer | |
| Mario Gyr | Switzerland | 2012 Summer, 2016 Summer | |
| Brigitte Gyr-Gschwend | Road cycling | 1988 Summer | |
| Jean Gysel | Water polo | 1936 Summer | |
| Pieter Gysel | Belgium | Short track speed skating | 2002 Winter, 2006 Winter, 2010 Winter | |
| Brooke Gysen | Australia | Artistic gymnastics | 1992 Summer | |
| Willy Gysi | Switzerland | Handball | 1936 Summer | |
| Rolf Gysin | Athletics | 1972 Summer, 1976 Summer | |
| Knut Gysler | Norway | Equestrian eventing, Equestrian jumping | 1920 Summer, 1928 Summer | |
| Eva Gysling | Switzerland | Swimming | 1984 Summer, 1988 Summer, 1992 Summer | |
| Georg Gyssling | Germany | Bobsleigh | 1932 Winter | |
| Boris Gyuderov | Bulgaria | Volleyball | 1964 Summer | |
| István Gyulai | Hungary | Athletics | 1964 Summer | |
| Márton Gyulai | Bobsleigh | 2002 Winter, 2006 Winter | |
| Mihály Gyulai | Wrestling | 1976 Summer | |
| Miklós Gyulai | Bobsleigh, Athletics | 1994 Winter, 2000 Summer | |
| Ileana Gyulai-Drîmbă-Jenei | Romania | Fencing | 1964 Summer, 1968 Summer, 1972 Summer, 1976 Summer | |
| Zsolt Gyulay | Hungary | Canoe sprint | 1988 Summer, 1992 Summer, 1996 Summer | |
| Arus Gyulbudaghyan | Armenia | Diving | 1996 Summer | |
| Réka Gyurátz | Hungary | Athletics | 2020 Summer, 2024 Summer | |
| Déborah Gyurcsek | Uruguay | 2000 Summer | |
| Gejza Gyurcsi | Slovakia | Water polo | 2000 Summer | |
| József Gyuricza | Hungary | Fencing | 1956 Summer, 1960 Summer, 1964 Summer | |
| János Gyurka | Handball | 1988 Summer | |
| Ferenc Gyurkovics | Weightlifting | 2004 Summer | |
| Spas Gyurov | Bulgaria | Road cycling | 2012 Summer | |
| Ginka Gyurova | Rowing | 1976 Summer, 1980 Summer | |
| Krasimira Gyurova | Basketball | 1976 Summer | |
| Dániel Gyurta | Hungary | Swimming | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Gergely Gyurta | 2012 Summer, 2016 Summer, 2020 Summer | |
| Kazimierz Gzowski | Poland | Equestrian jumping | 1928 Summer | |