| Name | Nation | Sport | Games | Notes |
|---|
| Ahmed Al-Maqabi | Bahrain | Handball | 2020 Summer | |
| Sireli Maqala | Fiji | Rugby sevens | 2020 Summer | |
| Adnan Maqsood | Pakistan | Field hockey | 2004 Summer, 2008 Summer | |
| Gérald Maquat | France | Rowing | 1948 Summer | |
| Jorge Maqueda | Spain | Handball | 2012 Summer, 2020 Summer, 2024 Summer | |
| Jean-Baptiste Maquet | Belgium | Fencing | 1952 Summer | |
| Juliano Máquina | Mozambique | Boxing | 2012 Summer | |
| María del Mar Feito | Spain | Field hockey | 1996 Summer, 2000 Summer, 2004 Summer | |
| María del Mar Rey | Volleyball | 1992 Summer | |
| María del Mar Sánchez | Athletics | 2000 Summer | |
| Roger Mar | United States | Shooting | 1992 Summer, 1996 Summer | |
| George Mara | Canada | Ice hockey | 1948 Winter | |
| Gibson Mara [ Wikidata ] | Papua New Guinea | Taekwondo | 2024 Summer | |
| Václav Mára | Czechoslovakia | Canoe sprint | 1968 Summer | |
| Adam Maraana | Israel | Swimming | 2024 Summer | |
| Mark Marabini | Zimbabwe | Triathlon | 2000 Summer | |
| Domingos Maracanã | Brazil | Volleyball | 1984 Summer, 1988 Summer | |
| Aurel Mărăcescu | Romania | Bobsleigh | 1936 Winter | |
| Oliver Marach | Austria | Tennis | 2016 Summer, 2020 Summer | |
| Nastassia Marachkouskaya | Belarus | Artistic gymnastics | 2008 Summer, 2012 Summer | |
| Roxana Maracineanu | France | Swimming | 2000 Summer | |
| Tibor Maracskó | Hungary | Modern pentathlon | 1976 Summer, 1980 Summer | |
| Jorge Maradiaga | Honduras | Athletics | 1992 Summer | |
| Katura Marae | Vanuatu | 2004 Summer | |
| Elisabeth Maragall | Spain | Field hockey | 1992 Summer | |
| Joseph Marais [ Wikidata ] | France | Fencing | 1908 Summer | |
| Lenise Marais | South Africa | Field hockey | 2008 Summer, 2012 Summer | |
| Marizen Marais | 2020 Summer | |
| José Marajo | France | Athletics | 1976 Summer, 1980 Summer | |
| Nina Marakina | Soviet Union | 1972 Summer | |
| Dambiinyamyn Maralgerel | Mongolia | Judo | 1992 Summer | |
| Cameron Maramenides [ Wikidata ] | Greece | Sailing | 2024 Summer | |
| Klaus Maran | Italy | 1984 Summer | |
| Arthur Maranda [ Wikidata ] | Canada | Athletics | 1912 Summer | |
| Kazimierz Maranda | Poland | 1972 Summer | |
| Mehdi Marandi | Iran | Volleyball | 2016 Summer, 2020 Summer | |
| Ido Marang | France | Field hockey | 1960 Summer | |
| Carla Marangoni | Italy | Artistic gymnastics | 1928 Summer | |
| Joanna Maranhão | Brazil | Swimming | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Ferdinand Marani | Canada | Art competitions | 1948 Summer | |
| Ivana Maranić | Croatia | Judo | 2020 Summer | |
| Rakiya Maraoui-Quétier | France | Athletics | 2004 Summer | |
| Vlasios Maras | Greece | Artistic gymnastics | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Pietro Marascalchi | Italy | Wrestling | 1960 Summer | |
| Nicolae Mărăscu | Romania | Rugby | 1924 Summer | |
| Natalia Mărășescu | Athletics | 1976 Summer, 1980 Summer | |
| Alexandra Mařasová | Czechoslovakia | Alpine skiing | 1984 Winter | |
| d’Auzac de la Maratinie [ Wikidata ] | France | Equestrian jumping | 1900 Summer | |
| Josef Mařatka | Czechoslovakia | Art competitions | 1932 Summer | |
| Louise Maraval | France | Athletics | 2024 Summer | |
| Dušan Maravić | Yugoslavia | Football | 1960 Summer | |
| Spiros Marazios | Australia | Volleyball | 2000 Summer | |
| Flavio Marazzi | Switzerland | Sailing | 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Renato Marazzi | 2000 Summer | |
| Margarita Marbler | Austria | Freestyle skiing | 2002 Winter, 2006 Winter, 2010 Winter | |
| Harlan Marbley | United States | Boxing | 1968 Summer | |
| James Marburg | Australia | Rowing | 2008 Summer, 2012 Summer | |
| Stephon Marbury | United States | Basketball | 2004 Summer | |
| Louis Marc | France | Swimming, Water polo | 1900 Summer | |
| Robert Marc [ Wikidata ] | Fencing | 1900 Summer | |
| Palmira Marçal | Brazil | Basketball | 2016 Summer | |
| Pedro Marçal | Portugal | Fencing | 1960 Summer | |
| André Marcano [ Wikidata ] | Trinidad and Tobago | Bobsleigh | 2022 Winter | |
| César Marcano | Venezuela | Track cycling | 2012 Summer, 2016 Summer | |
| Elias Marcano | Wrestling | 1996 Summer | |
| Marcão | Brazil | Handball | 2004 Summer | |
| Hortência Marcari | Basketball | 1992 Summer, 1996 Summer | |
| Jacques Marcault | France | Road cycling | 1912 Summer | |
| Olivier Marceau | France, Switzerland | Triathlon | 2000 Summer, 2004 Summer, 2008 Summer | |
| Alexander Marček | Czechoslovakia | Swimming | 1988 Summer | |
| Davor Marcelić | Croatia | Basketball | 1996 Summer | |
| Ivan Marcelić | Water polo | 2020 Summer | |
| Fábio Marcelino | Brazil | Volleyball | 1996 Summer | |
| José Marcelino | 1972 Summer | |
| Davorin Marčelja | Yugoslavia | Athletics | 1948 Summer | |
| Jan Marcell | Czech Republic | 2008 Summer | |
| Armand Marcelle | France | Rowing | 1928 Summer | |
| Édouard Marcelle | 1928 Summer | |
| Abbondio Marcelli | Italy | 1956 Summer | |
| Vittorio Marcelli | Road cycling | 1968 Summer | |
| Luciana Marcellini | Swimming | 1960 Summer | |
| Dirk Marcellis | Netherlands | Football | 2008 Summer | |
| Marcelo | Brazil | 2008 Summer, 2012 Summer | |
| Rogelio Marcelo | Cuba | Boxing | 1992 Summer | |
| Carlos Marcenaro | Peru | Athletics | 1936 Summer | |
| Aaron March | Italy | Snowboarding | 2010 Winter, 2014 Winter, 2018 Winter | |
| Albert March | Great Britain | Figure skating | 1908 Summer | |
| Walter March | Germany | Art competitions | 1936 Summer | |
| Werner March | 1928 Summer, 1936 Summer | |
| William March | United States | Weightlifting | 1964 Summer | |
| Auguste Marchais | France | Athletics | 1900 Summer | |
| Joe Marchal | United States | Judo | 1988 Summer | |
| Robert Marchal | France | Athletics | 1924 Summer, 1928 Summer | |
| Alberto Marchán | Venezuela | 1972 Summer | |
| Jaden Marchan [ Wikidata ] | Trinidad and Tobago | 2024 Summer | |
| Ángel M. Marchand | Puerto Rico | Shooting | 1968 Summer | |
| Bernard Marchand | Switzerland | Athletics | 1936 Summer | |
| Christophe Marchand | France | Swimming | 1988 Summer, 1992 Summer | |
| Gerald Marchand | Great Britain | Canoe sprint | 1952 Summer | |
| Guy Marchand | France | Wrestling | 1968 Summer | |
| Juan Marchand | Puerto Rico | Shooting | 1976 Summer | |
| Kathrin Marchand | Germany | Rowing | 2012 Summer, 2016 Summer | |
| Léon Marchand | France | Swimming | 2020 Summer, 2024 Summer | |
| Marcel Marchand | Belgium | Weightlifting | 1920 Summer | |
| Pierre Marchand | France | Fencing | 1972 Summer | |
| Robert Marchand | Athletics | 1928 Summer | |
| Xavier Marchand | Swimming | 1996 Summer, 2000 Summer | |
| Marie Marchand-Arvier | Alpine skiing | 2006 Winter, 2010 Winter, 2014 Winter | |
| Natallia Marchanka | Belarus | Basketball | 2008 Summer | |
| Armand Marchant | Belgium | Alpine skiing | 2022 Winter | |
| Katy Marchant | Great Britain | Track cycling | 2016 Summer, 2020 Summer, 2024 Summer | |
| Lanni Marchant | Canada | Athletics | 2016 Summer | |
| Louis Marchant | Great Britain | Diving | 1948 Summer | |
| Peter Marchant | Shooting | 1948 Summer | |
| Sergio Marchant | Chile | Football | 1984 Summer | |
| Todd Marchant | United States | Ice hockey | 1994 Winter | |
| Tony Marchant | Australia | Track cycling | 1956 Summer | |
| Marlo Marcheco | Cuba | Canoe sprint | 1992 Summer | |
| Umberto Marcheggiani | Italy | Wrestling | 1968 Summer, 1972 Summer | |
| Marco Marchei | Athletics | 1980 Summer, 1984 Summer | |
| Valentina Marchei | Figure skating | 2014 Winter, 2018 Winter | |
| Carla Marchelli | Alpine skiing | 1956 Winter, 1960 Winter | |
| Maria Grazia Marchelli | 1952 Winter, 1956 Winter | |
| Carlos Marchena | Spain | Football | 2000 Summer | |
| Alexey Marchenko | Russian Olympic Committee | Ice hockey | 2018 Winter | |
| Igor Marchenko | Ukraine | Figure skating | 1998 Winter | |
| Igor Marchenko | Russia | Swimming | 2000 Summer, 2004 Summer | |
| Illya Marchenko | Ukraine | Tennis | 2016 Summer | |
| Oleksandr Marchenko | Soviet Union, Ukraine | Rowing | 1988 Summer, 1996 Summer, 2000 Summer | |
| Veronika Marchenko | Ukraine | Archery | 2016 Summer, 2020 Summer, 2024 Summer | |
| Vladimir Marchenko | Soviet Union | Artistic gymnastics | 1976 Summer | |
| Vladislav Marchenkov | Russian Olympic Committee | Skeleton | 2018 Winter | |
| Michael Marchesano | Italy | Baseball | 2004 Summer | |
| Roberto Marchesi | Biathlon | 1988 Winter | |
| Susanna Marchesi | Rhythmic gymnastics | 2000 Summer | |
| Michele Marchesini | Sailing | 2004 Summer | |
| Romain Marchessou | Monaco | Weightlifting | 2008 Summer | |
| Giovanni Marchetti | Italy | Ice hockey | 1992 Winter | |
| Leandro Marchetti | Argentina | Fencing | 1996 Summer, 2000 Summer | |
| Piero Marchetti | Italy | Bobsleigh | 1928 Winter | |
| Maurizio Marchetto | Speed skating | 1976 Winter, 1980 Winter, 1984 Winter | |
| Czesław Marchewczyk | Poland | Ice hockey | 1932 Winter, 1936 Winter, 1948 Winter | |
| Adevildo De Marchi | Italy | Football | 1920 Summer | |
| Amedeo Marchi | Artistic gymnastics | 1908 Summer | |
| Gabriella Marchi | 1972 Summer | |
| Nadia Marchi | San Marino | Shooting | 1996 Summer | |
| Carlo Marchiandi [ Wikidata ] | Italy | Artistic gymnastics | 1908 Summer | |
| Eleonora Marchiando | Athletics | 2020 Summer | |
| Rolando Marchinares | Peru | Weightlifting | 1988 Summer, 1992 Summer | |
| Giannina Marchini | Italy | Athletics | 1928 Summer | |
| Libero Marchini | Football | 1936 Summer | |
| Mary Anne Marchino | United States | Swimming | 1956 Summer | |
| Nathalie Marchino | Colombia | Rugby sevens | 2016 Summer | |
| Leo Marchiori | Canada | Track cycling | 1932 Summer | |
| Mario Marchiori | Italy | Field hockey | 1952 Summer | |
| Tullio Marchiori | 1960 Summer | |
| Giandomenico De Marchis | Art competitions | 1936 Summer | |
| Claudio Marchisio | Football | 2008 Summer | |
| Anton Marchl | Austria | Wrestling | 1992 Summer | |
| Georg Marchl | 1984 Summer | |
| Ryszard Marchlik | Poland | Canoe sprint | 1960 Summer, 1964 Summer, 1968 Summer | |
| Kasamiro Kashri Marchlo | Sudan | Boxing | 1972 Summer | |
| Sergey Marchuk | Soviet Union | Speed skating | 1976 Winter | |
| Hans Märchy | Switzerland | Bobsleigh | 1984 Winter | |
| Stefano Marcia | South Africa | Sailing | 2016 Summer | |
| Ana Marcial | Puerto Rico | Swimming | 1968 Summer | |
| Eumir Marcial | Philippines | Boxing | 2020 Summer, 2024 Summer | |
| Silvia Marciandi | Italy | Freestyle skiing | 1992 Winter, 1994 Winter | |
| Angelo Marciani | Water polo | 1956 Summer | |
| Claude Marcil | Canada | Fencing | 1984 Summer | |
| Antonio Marcilla | Argentina | Boxing | 1956 Summer | |
| Marcel Marcilloux | France | Fencing | 2012 Summer | |
| Honorata Marcińczak | Poland | Artistic gymnastics | 1952 Summer | |
| Marek Marcińczak | Ice hockey | 1976 Winter, 1980 Winter | |
| Marcin Marciniszyn | Athletics | 2004 Summer, 2012 Summer | |
| Iwona Marcinkiewicz | Archery | 1996 Summer, 2004 Summer, 2008 Summer | |
| Miroslav Marcinko | Slovakia | Ice hockey | 1994 Winter | |
| Tomáš Marcinko | 2014 Winter, 2018 Winter | |
| Dariusz Marcinkowski | Poland | Field hockey | 2000 Summer | |
| Ewelina Marcisz | Cross country skiing | 2018 Winter | |
| Izabela Marcisz | 2022 Winter | |
| Kęstutis Marčiulionis | Lithuania | Basketball | 2000 Summer | |
| Šarūnas Marčiulionis | Soviet Union, Lithuania | 1988 Summer, 1992 Summer, 1996 Summer | |
| Sander van der Marck | Netherlands | Rowing | 1996 Summer | |
| Gerhard Marcks | Germany | Art competitions | 1928 Summer, 1932 Summer, 1936 Summer | |
| Megan Marcks | Australia | Rowing | 1992 Summer, 1996 Summer | |
| José María de Marco Pérez | Spain | 1992 Summer, 1996 Summer | |
| Filiberto Marco | 1968 Summer | |
| Luis Alberto Marco | Athletics | 2012 Summer | |
| Nicolae Marcoci | Romania | Equestrian dressage | 1956 Summer | |
| Serghei Marcoci | Soviet Union, Unified Team | Water polo | 1988 Summer, 1992 Summer | |
| Dario Marcolin | Italy | Football | 1992 Summer | |
| Francesco Marcolini | Sailing | 2004 Summer, 2008 Summer | |
| Sholto Marcon | Great Britain | Field hockey | 1920 Summer | |
| Denis Marconato | Italy | Basketball | 2000 Summer, 2004 Summer | |
| Massimo Marconcini | Rowing | 1992 Summer | |
| Matteo Marconcini | Judo | 2016 Summer | |
| Matheus Marcondes | Brazil | Athletics | 1932 Summer | |
| Maria Marconi | Italy | Diving | 2000 Summer, 2008 Summer, 2016 Summer | |
| Nicola Marconi | 2000 Summer, 2004 Summer, 2008 Summer | |
| Tommaso Marconi | 2004 Summer, 2008 Summer | |
| Harry Marcoplos | United States | Field hockey | 1948 Summer, 1956 Summer | |
| Marcos Paulo | Brazil | Football | 2000 Summer | |
| Eloisa Marcos | Spain | Artistic gymnastics | 1976 Summer | |
| Gustavo Marcos | Water polo | 2000 Summer, 2004 Summer | |
| Odael Marcos | Cuba | Handball | 2000 Summer | |
| Élise Marcotte | Canada | Artistic swimming | 2008 Summer, 2012 Summer | |
| Félix Marcotte | France | Sailing | 1900 Summer | |
| Anninos Marcoullides | Cyprus | Athletics | 1996 Summer, 2000 Summer, 2004 Summer | |
| Michael Marcour | West Germany | Sailing | 1984 Summer | |
| Christian Marcoux | Canada | Freestyle skiing | 1992 Winter | |
| Valérie Marcoux | Figure skating | 2006 Winter | |
| Antonio Marcucci | Italy | Wrestling | 1960 Summer | |
| Tadeo Marcucci | Argentina | Field hockey | 2024 Summer | |
| Cornel Mărculescu | Romania | Water polo | 1964 Summer | |
| Martín Marculeta | Spain | Football | 1928 Summer | |
| Alfredo Marcuño | Wrestling | 1988 Summer | |
| David Marcus | Canada | Equestrian dressage | 2012 Summer | |
| Egerton Marcus | Boxing | 1988 Summer | |
| Golda Marcus | El Salvador | Swimming | 2004 Summer, 2008 Summer | |
| Ida Marcussen | Norway | Athletics | 2008 Summer, 2012 Summer | |
| Jørgen Marcussen | Denmark | Road cycling | 1972 Summer | |
| Peder Marcussen | Artistic gymnastics | 1920 Summer | |
| Santé Marcuzzi | France | Rowing | 1956 Summer | |
| Patrick Marcy | United States | Wrestling | 1976 Summer | |
| Tamás Märcz | Hungary | Water polo | 2000 Summer | |
| Ryszard Marczak | Poland | Athletics | 1980 Summer | |
| Sebastian Marczak | Australia | Canoe sprint | 2012 Summer | |
| Jagna Marczułajtis | Poland | Snowboarding | 1998 Winter, 2002 Winter, 2006 Winter | |
| Adam Marczyński | Art competitions | 1948 Summer | |
| Tomasz Marczyński | Road cycling | 2008 Summer | |
| Thomas Mardal | Norway | Athletics | 2024 Summer | |
| Jon Mårdalen | Cross country skiing | 1924 Winter | |
| Kjetil Mårdalen | Nordic combined | 1956 Winter | |
| Sajjad Mardani | Iran | Taekwondo | 2016 Summer | |
| Andrian Mardare | Moldova | Athletics | 2020 Summer, 2024 Summer | |
| Bechir Mardassi | Tunisia | Road cycling | 1960 Summer | |
| Anne Marden | United States | Rowing | 1984 Summer, 1988 Summer, 1992 Summer | |
| Nikola Mardešić | Yugoslavia | 1972 Summer | |
| Khadija El-Mardi | Morocco | Boxing | 2016 Summer, 2024 Summer | |
| Kevork Mardikian | Syria | Football | 1980 Summer | |
| Yusra Mardini | Refugee Olympic Team | Swimming | 2016 Summer, 2020 Summer | |
| Paul Mardle | Great Britain | Athletics | 1988 Summer | |
| María José Mardomingo | Spain | 1992 Summer, 1996 Summer | |
| Francisca Mardones | Chile | Football | 2020 Summer | |
| Santiago Mare | Argentina | Rugby sevens | 2020 Summer, 2024 Summer | |
| Otakar Mareček | Czechoslovakia | Rowing | 1968 Summer, 1972 Summer, 1976 Summer | |
| Delphine Maréchal | France | Artistic swimming | 1996 Summer | |
| Émile Maréchal [ Wikidata ] | Track cycling | 1908 Summer | |
| Eva Marečková | Czechoslovakia | Artistic gymnastics | 1980 Summer | |
| Juan Marecos | Paraguay | Football | 1992 Summer | |
| David Maree | South Africa | Track cycling | 2020 Summer | |
| Florent Marée | France | Artistic gymnastics | 2000 Summer, 2004 Summer | |
| Sydney Maree | United States | Athletics | 1988 Summer | |
| Trudi Maree | South Africa | Swimming | 2012 Summer | |
| Ruggero Maregatti | Italy | Athletics | 1932 Summer | |
| Hana Mareghni | Tunisia | Judo | 2012 Summer | |
| Ahmed Marei | Egypt | Basketball | 1984 Summer | |
| Salma Marei [ Wikidata ] | Artistic swimming | 2024 Summer | |
| Anna Marejková | Czechoslovakia | Artistic gymnastics | 1956 Summer | |
| Claus Marek | West Germany | Athletics | 1976 Summer | |
| František Marek | Czechoslovakia | 1920 Summer | |
| František Marek | Art competitions | 1948 Summer | |
| Henryk Marek | Poland | Cross country skiing | 1964 Winter | |
| Krzysztof Marek | Rowing | 1972 Summer | |
| Sergio Marelli | Italy | Basketball | 1952 Summer | |
| José Luis Marello | Argentina | Canoe sprint | 1988 Summer, 1992 Summer | |
| Johannes Maremane | South Africa | Athletics | 2000 Summer | |
| Juan Marén | Cuba | Wrestling | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer | |
| Alvaro Marenco | Nicaragua | Weightlifting | 1992 Summer | |
| Izayana Marenco | Judo | 2020 Summer, 2024 Summer | |
| María José Marenco | El Salvador | Swimming | 1992 Summer | |
| Igor Marenić | Croatia | Sailing | 2008 Summer, 2012 Summer, 2016 Summer | |
| Yekaterina Marennikova | Russia | Handball | 2008 Summer, 2012 Summer, 2016 Summer | |
| Alexander Marent | Austria | Cross country skiing | 1992 Winter, 2002 Winter | |
| Alessandra Marenzi | Italy | Sailing | 2004 Summer | |
| Abner Mares | Mexico | Boxing | 2004 Summer | |
| Ruben Mares | Philippines | 1976 Summer | |
| Uwe Mares | Germany, West Germany | Sailing | 1964 Summer, 1976 Summer | |
| Rudolf Maresch | Austria | Road cycling, Track cycling | 1956 Summer | |
| Sven Maresch | Germany | Judo | 2016 Summer | |
| Anna Marešová | Czechoslovakia | Rowing | 1976 Summer | |
| Kateřina Marešová | Czech Republic | Artistic gymnastics | 2000 Summer | |
| Oldřiška Marešová | Athletics | 2012 Summer | |
| Cyrille Maret | France | Judo | 2016 Summer | |
| Tamás Márffy | Hungary | Field hockey | 1936 Summer | |
| Luigi Marfut | Italy | Boxing | 1924 Summer | |
| Harald Marg | East Germany | Canoe sprint | 1980 Summer | |
| Maurizio Margaglio | Italy | Figure skating | 1998 Winter, 2002 Winter, 2006 Winter | |
| Valentina Margaglio | Skeleton | 2022 Winter | |
| Alphonse Margailland | France | Rowing | 1928 Summer | |
| Mario Margalef | Uruguay | Road cycling | 1972 Summer | |
| Miguel Margalef | Track cycling | 1976 Summer | |
| Tomás Margalef | 2004 Summer | |
| Melanie Margalis | United States | Swimming | 2016 Summer | |
| Enrique Margall | Spain | Basketball | 1968 Summer, 1972 Summer | |
| Josep Maria Margall | 1980 Summer, 1984 Summer, 1988 Summer | |
| Mercedes Margalot | Argentina | Field hockey | 2000 Summer, 2004 Summer, 2008 Summer | |
| Elena Mărgărit | Romania | Artistic gymnastics | 1956 Summer, 1960 Summer | |
| Ricardo Margarit | Spain | Rowing | 1900 Summer | |
| Konstantina Margariti | Greece | Artistic gymnastics | 1996 Summer | |
| Dmitri Margaryan | Armenia | Swimming | 2000 Summer | |
| Vladimir Margaryan | Boxing | 2016 Summer | |
| Sergey Margatsky | Kazakhstan | Cross country skiing | 1994 Winter | |
| Arthur Margelidon | Canada | Judo | 2020 Summer, 2024 Summer | |
| Pascal Margerit | France | Ice hockey | 1992 Winter | |
| Anja Margetić | Bosnia and Herzegovina | Swimming | 1992 Summer | |
| Matt Margetts [ Wikidata ] | Canada | Freestyle skiing | 2014 Winter | |
| Nelson Margetts | United States | Polo | 1920 Summer | |
| Deividas Margevičius | Lithuania | Swimming | 2016 Summer, 2020 Summer | |
| Serghei Marghiev | Moldova | Athletics | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Zalina Marghieva | 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Chedli El-Marghni | Tunisia | 1964 Summer | |
| Paolo Giani Margi | Italy | Equestrian dressage | 1992 Summer, 1996 Summer | |
| Gabriela Mărginean | Romania | 3x3 basketball | 2020 Summer | |
| Massimo Margiotta | Italy | Football | 2000 Summer | |
| Thorsten Margis | Germany | Bobsleigh | 2014 Winter, 2018 Winter, 2022 Winter | |
| Aleksander Margiste | Estonia | Basketball | 1936 Summer | |
| Tamás Margl | Hungary | Athletics, Bobsleigh | 2004 Summer, 2006 Winter | |
| György Margó | Field hockey | 1936 Summer | |
| James Margolis | United States | Fencing | 1960 Summer | |
| Mitja Margon | Slovenia | Sailing | 1996 Summer, 2000 Summer | |
| Stefano Margoni | Italy | Ice hockey | 1998 Winter, 2006 Winter | |
| David Margoshvili | Georgia | Judo | 2004 Summer | |
| Georges Margot | France | Equestrian eventing | 1936 Summer | |
| Stefano Margotti | Italy | Shooting | 1936 Summer, 1948 Summer | |
| Diego Margozzini | Chile | Alpine skiing | 1992 Winter, 1994 Winter | |
| Inés Margraff | Ecuador | Shooting | 1988 Summer | |
| Jean Margraff | France | Fencing | 1920 Summer | |
| Paúl Margraff | Ecuador | Shooting | 1984 Summer | |
| Reiner Margreiter | Austria | Luge | 2002 Winter, 2006 Winter | |
| Yaseen Margro | South Africa | Water polo | 2020 Summer | |
| Rok Marguč | Slovenia | Snowboarding | 2010 Winter, 2014 Winter, 2018 Winter, 2022 Winter | |
| Antonio Marguccio | Australia | Weightlifting | 1964 Summer | |
| José Margues | Portugal | Rowing | 1972 Summer | |
| Annik Marguet | Switzerland | Shooting | 2008 Summer, 2012 Summer | |
| Gilles Marguet | France | Biathlon | 2002 Winter | |
| Carly Margulies | United States | Freestyle skiing | 2022 Winter | |
| Mike Margulis | Football | 1972 Summer | |
| Vazha Margvelashvili | Georgia | Judo | 2016 Summer, 2020 Summer, 2024 Summer | |
| Ilona Marhele | Latvia | Athletics | 2016 Summer | |
| Fred Marhenke | West Germany | Judo | 1976 Summer | |
| David Mari | Australia | Bobsleigh | 2018 Winter | |
| Giacomo Mari | Italy | Football | 1948 Summer | |
| Italo Mari | Shooting | 1980 Summer | |
| José Mari | Spain | Football | 2000 Summer | |
| Lamberto Mari | Italy | Diving | 1952 Summer, 1960 Summer | |
| Ivette María | Spain | Swimming | 1996 Summer, 2000 Summer | |
| Manoel Maria | Brazil | Football | 1968 Summer | |
| Tatjana Maria | Germany | Tennis | 2024 Summer | |
| Zé Maria | Brazil | Football | 1996 Summer | |
| Fernando Mariaca | Spain | Weightlifting | 1984 Summer, 1988 Summer, 1992 Summer | |
| Hans Mariacher | Austria | Ski jumping | 1936 Winter | |
| Augustino Marial | Sudan | Boxing | 1984 Summer | |
| Guor Marial | Independent Olympians, South Sudan | Athletics | 2012 Summer, 2016 Summer | |
| Teodor Marian | Romania | Rugby | 1924 Summer | |
| Ferrero Marianetti | Italy | Diving | 1936 Summer | |
| Amos Mariani | Football | 1952 Summer | |
| Carolina Mariani | Argentina | Judo | 1992 Summer, 1996 Summer, 2000 Summer | |
| Edoardo Mariani | Italy | Football | 1912 Summer | |
| Felice Mariani | Judo | 1976 Summer, 1984 Summer | |
| Marco Mariani | Curling | 2006 Winter | |
| Orazio Mariani | Athletics | 1936 Summer | |
| Arthur Mariano | Brazil | Artistic gymnastics | 2016 Summer, 2020 Summer, 2024 Summer | |
| Brian Mariano | Netherlands | Athletics | 2012 Summer | |
| Haroldo Mariano | Brazil | Diving | 1948 Summer | |
| Jimmy Mariano | Philippines | Basketball | 1968 Summer, 1972 Summer | |
| Milena Mariano | Brazil | Rugby sevens | 2024 Summer | |
| Aleks Marić | Australia | Basketball | 2012 Summer | |
| Daniel Maric | France | Ice hockey | 1988 Winter | |
| Igor Marić | Croatia | Bobsleigh | 2010 Winter | |
| Janez Marič | Slovenia | Biathlon | 2002 Winter, 2006 Winter, 2010 Winter, 2014 Winter | |
| Marcela Marić | Croatia | Diving | 2016 Summer | |
| Martin Marić | Athletics | 2008 Summer, 2012 Summer | |
| Miran Maričić | Shooting | 2020 Summer, 2024 Summer | |
| Juan Maricich | Argentina | Canoe slalom | 1992 Summer | |
| Maria Maricich | United States | Alpine skiing | 1984 Winter | |
| Albert Marie | Seychelles | Athletics | 1980 Summer, 1984 Summer | |
| André-Jacques Marie | France | 1948 Summer | |
| Evans Marie | Seychelles | 2004 Summer | |
| Henri le Marié [ Wikidata ] | France | Shooting | 1912 Summer | |
| Nathalie Marie | Canoe sprint | 2004 Summer | |
| Thierry Marie | Road cycling | 1984 Summer | |
| Taky Marie-Divine Kouamé | Track cycling | 2024 Summer | |
| Annabelle Mariejeanne | Mauritius | Swimming | 1992 Summer | |
| Delphine Marien | Belgium | Field hockey | 2024 Summer | |
| Hanna Mariën | Athletics, Bobsleigh | 2008 Summer, 2014 Winter | |
| Joseph Marien | Athletics | 1928 Summer | |
| Léopold Marien | 1960 Summer, 1964 Summer | |
| Thierry Mariën | 3x3 basketball | 2020 Summer | |
| Bruno Marie-Rose | France | Athletics | 1984 Summer, 1988 Summer, 1992 Summer | |
| Alessandra Mariéthoz | Switzerland | Fencing | 1988 Summer | |
| Federico Marietti | Italy | Basketball | 1948 Summer, 1952 Summer | |
| Pasquale Marigliano | Rowing | 1988 Summer | |
| Tomislav Marijanović | Croatia | Judo | 2012 Summer | |
| Christoph Marik | Austria | Fencing | 2000 Summer, 2004 Summer | |
| Klára Marik | Hungary | Art competitions | 1936 Summer | |
| Bourama Mariko | Mali | Judo | 2004 Summer | |
| Lamin Marikong | The Gambia | Athletics | 1992 Summer | |
| Mika Marila | Finland | Alpine skiing | 1994 Winter, 1998 Winter | |
| Humberto Mariles | Mexico | Equestrian jumping, Equestrian eventing | 1948 Summer, 1952 Summer | |
| Srđan Marilović | Independent Olympians | Canoe sprint | 1992 Summer | |
| Analía Marín | Argentina | Rowing | 2004 Summer | |
| Antonio Marín | Spain | Bobsleigh | 1968 Winter | |
| Carolina Marín | Badminton | 2012 Summer, 2016 Summer, 2024 Summer | |
| Cornel Marin | Romania | Fencing | 1976 Summer, 1980 Summer, 1984 Summer | |
| Elisabetta Marin | Italy | Athletics | 2004 Summer | |
| Gabriel Marin | Romania | Rowing | 1992 Summer, 1996 Summer | |
| Isaac Marin | Costa Rica | Boxing | 1968 Summer | |
| José Marín | Spain | Athletics | 1980 Summer, 1984 Summer, 1988 Summer, 1992 Summer | |
| Juan Marin | Puerto Rico | Judo | 1972 Summer | |
| Juan Antonio Marín | Costa Rica | Tennis | 2000 Summer | |
| Lazaro Marin | Cuba | Volleyball | 1992 Summer, 1996 Summer | |
| Lluís Marín | Andorra | Snowboarding | 2010 Winter, 2014 Winter, 2018 Winter | |
| Luca Marin | Italy | Swimming | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Marco Marin | Fencing | 1984 Summer, 1988 Summer, 1992 Summer | |
| Marius Marin | Romania | Football | 2020 Summer | |
| Milaimys Marín | Cuba | Wrestling | 2024 Summer | |
| Montserrat Marin | Spain | Handball | 1992 Summer | |
| Noémie Marin | Canada | Softball | 2008 Summer | |
| Olimpiu Marin | Romania | Shooting | 1992 Summer | |
| Ricardo Marín | Spain | Handball | 1988 Summer, 1992 Summer | |
| Ruber Marín | Colombia | Road cycling | 1996 Summer, 2000 Summer | |
| Miguel Marina | Spain | Shooting | 1968 Summer, 1972 Summer | |
| Vanessa Marina | Portugal | Breaking | 2024 Summer | |
| Michael Marinaro | Canada | Figure skating | 2018 Winter, 2022 Winter | |
| Nikolay Marincheshki | Bulgaria | Fencing | 1980 Summer, 1988 Summer | |
| Martin Marinčin | Slovakia | Ice hockey | 2014 Winter, 2022 Winter | |
| Frédéric Marin-Cudraz | France | Alpine skiing | 1998 Winter | |
| Jorge Mariné | Spain | Road cycling | 1964 Summer | |
| Dennis Marineau | Canada | Bobsleigh | 1992 Winter | |
| Danko Marinelli | Croatia | Alpine skiing | 2006 Winter, 2010 Winter | |
| Giancarlo Marinelli | Italy | Basketball | 1936 Summer, 1948 Summer | |
| Nadezhda Marinenko | Soviet Union | Athletics | 1976 Summer | |
| Alexandra Marinescu | Romania | Artistic gymnastics | 1996 Summer | |
| Alexandru Marinescu | Water polo | 1956 Summer | |
| Aurelia Marinescu | Rowing | 1976 Summer | |
| Nicolae Marinescu | Fencing | 1936 Summer, 1952 Summer | |
| Tecla Marinescu | Canoe sprint | 1984 Summer | |
| Jhan Mariñez | Dominican Republic | Baseball | 2020 Summer | |
| Tonny Maringgi | Indonesia | Table tennis | 1988 Summer | |
| Marinho | Brazil | Football | 1976 Summer | |
| Álvaro Marinho | Portugal | Sailing | 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Dênis Marinho | Brazil | Rowing | 1984 Summer, 1988 Summer | |
| Dirceu Marinho | 1996 Summer | |
| Tiffani Marinho | Athletics | 2020 Summer, 2024 Summer | |
| Fiorenzo Marini | Italy | Fencing | 1948 Summer, 1960 Summer | |
| Tommaso Marini | 2024 Summer | |
| Enej Marinič [ Wikidata ] | Slovenia | Judo | 2024 Summer | |
| Matija Marinić | Croatia | Canoe slalom | 2020 Summer, 2024 Summer | |
| Lucien Marinier | France | Art competitions | 1924 Summer | |
| Maxim Marinin | Russia | Figure skating | 2002 Winter, 2006 Winter | |
| Kyros Marinis | Greece | Athletics | 1948 Summer | |
| Serghei Mariniuc | Unified Team, Moldova | Swimming | 1992 Summer, 1996 Summer, 2000 Summer | |
| Boško Marinko | Yugoslavia | Wrestling | 1968 Summer, 1972 Summer | |
| Andreja Marinković | Serbia and Montenegro | Athletics | 1996 Summer | |
| Vanja Marinković | Serbia | Basketball | 2024 Summer | |
| Angela Marino | New Zealand | 2004 Summer, 2008 Summer | |
| Cathy Marino | United States | Canoe sprint | 1988 Summer, 1992 Summer | |
| Julia Marino | Paraguay | Freestyle skiing | 2014 Winter | |
| Julia Marino | United States | Snowboarding | 2018 Winter, 2022 Winter | |
| Laura Marino | France | Diving | 2016 Summer | |
| Massimo Marino | Italy | Track cycling | 1972 Summer, 1976 Summer | |
| Osvaldo Mariño | Uruguay | Water polo | 1948 Summer | |
| Ramiro Marino | Argentina | Cycling BMX racing | 2008 Summer | |
| Valentina Marino | Italy | Rhythmic gymnastics | 1996 Summer | |
| Vicente Sartorius, 4th Marquess of Mariño | Spain | Bobsleigh | 1956 Winter | |
| Héctor Marinoni | Argentina | Field hockey | 1968 Summer, 1972 Summer | |
| Hristo Marinov | Bulgaria | Wrestling | 2012 Summer | |
| Ivailo Marinov | Boxing | 1980 Summer, 1988 Summer | |
| Ivan Marinov | Canoe sprint | 1988 Summer | |
| Martin Marinov | Bulgaria, Australia | 1988 Summer, 1992 Summer, 1996 Summer, 2004 Summer, 2016 Summer | |
| Sevdalin Marinov | Bulgaria | Weightlifting | 1988 Summer | |
| Galina Marinova | Artistic gymnastics | 1980 Summer | |
| Galina Marinova | Rhythmic gymnastics | 2000 Summer | |
| Simona Marinova | North Macedonia | Swimming | 2012 Summer | |
| Tereza Marinova | Bulgaria | Athletics | 2000 Summer | |
| Vanya Marinova | Artistic gymnastics | 1968 Summer | |
| Zornitsa Marinova | Rhythmic gymnastics | 2004 Summer, 2008 Summer | |
| Smiljana Marinović | Croatia | Swimming | 2000 Summer, 2004 Summer, 2008 Summer | |
| Sérgio Marins | Brazil | Equestrian eventing | 2004 Summer | |
| Mário Sérgio | Portugal | Football | 2004 Summer | |
| Liliane Mario [ Wikidata ] | Angola | Handball | 2024 Summer | |
| Yvon Mariolle | France | Boxing | 1968 Summer | |
| Auguste Marion | Shooting | 1912 Summer | |
| Charles Marion | Equestrian dressage | 1928 Summer, 1932 Summer | |
| Edo Marion | Yugoslavia | Fencing | 1936 Summer | |
| Éva Marion | France | Canoe sprint | 1952 Summer, 1956 Summer | |
| Luciano Marion | Italy | Rowing | 1952 Summer | |
| Shawn Marion | United States | Basketball | 2004 Summer | |
| Jean-Pierre Marionex | Belgium | Field hockey | 1960 Summer | |
| Romain Marion-Vernoux [ Wikidata ] | France | Water polo | 2024 Summer | |
| Alessandro Mariotti | San Marino | Alpine skiing | 2018 Winter | |
| Ibtissam Marirhi | Morocco | Shooting | 2020 Summer | |
| André van Maris [ Wikidata ] | Netherlands | Baseball | 1996 Summer | |
| Jac Maris | Art competitions | 1936 Summer | |
| Marisa | Brazil | Football | 1996 Summer | |
| Alonso Mariscal | Mexico | Diving | 1932 Summer | |
| Ángel Mariscal | Spain | Football | 1928 Summer | |
| Antonio Mariscal | Mexico | Diving | 1932 Summer | |
| Diego Mariscal | 1948 Summer | |
| Federico Mariscal | 1928 Summer, 1932 Summer | |
| Nicolas Marischael | France | Water polo | 1988 Summer | |
| Vita Marissa | Indonesia | Badminton | 2004 Summer, 2008 Summer | |
| Fibriani Ratna Marita | Swimming | 2008 Summer | |
| Hillary Maritim | Kenya | Athletics | 2000 Summer | |
| Joseph Maritim | 1988 Summer | |
| François Marits | Netherlands | Shooting | 1924 Summer | |
| Günther Maritschnigg | Germany | Wrestling | 1960 Summer | |
| Vasile Mariuțan | Romania | Boxing | 1960 Summer, 1964 Summer | |
| Francisco Marizán | Dominican Republic | Football | 2024 Summer | |
| Helinä Marjamaa | Finland | Athletics | 1980 Summer, 1984 Summer | |
| Kalevi Marjamaa | Boxing | 1976 Summer, 1980 Summer | |
| Pekka Marjamäki | Ice hockey | 1972 Winter, 1976 Winter | |
| Sari Marjamäki | 1998 Winter, 2002 Winter, 2006 Winter | |
| Dragan Marjanac | Serbia | Handball | 2012 Summer | |
| Marijan Marjanović | Yugoslavia | Football | 1924 Summer | |
| Marko Marjanović | Serbia | Rowing | 2016 Summer | |
| Verona Marjanović | Bosnia and Herzegovina | Luge | 1994 Winter | |
| Kamal Marjouane | Morocco | Boxing | 1988 Summer, 1992 Summer | |
| Christian Mark | Austria | Bobsleigh | 1984 Winter, 1988 Winter | |
| Lauryn Mark | Australia | Shooting | 2004 Summer, 2012 Summer | |
| Olof Mark | Sweden | Sailing | 1912 Summer | |
| Poul Mark | Denmark | Artistic gymnastics | 1912 Summer | |
| Russell Mark | Australia | Shooting | 1988 Summer, 1992 Summer, 1996 Summer, 2000 Summer, 2008 Summer, 2012 Summer | |
| Nick Markakis | Greece | Baseball | 2004 Summer | |
| Boris Markarov | Soviet Union | Water polo | 1956 Summer | |
| Tamara Markashanskaya | Cross country skiing | 1984 Winter | |
| Marsha Mark-Baird | Trinidad and Tobago | Athletics | 2000 Summer, 2004 Summer | |
| Vladimir Markelov | Soviet Union | Artistic gymnastics | 1976 Summer, 1980 Summer | |
| Ingeborg Helen Marken | Norway | Alpine skiing | 1998 Winter, 2002 Winter | |
| Christian Markersen | Denmark | Athletics | 1932 Summer | |
| Kazys Markevičius | Lithuania | Boxing | 1928 Summer | |
| Vidas Markevičius | 1992 Summer | |
| Anna Markfort [ Wikidata ] | Germany | Sailing | 2024 Summer | |
| Kate Markgraf | United States | Football | 2000 Summer, 2004 Summer, 2008 Summer | |
| Hansruedi Märki | Switzerland | Track cycling | 1984 Summer | |
| Matjaž Markič | Slovenia | Swimming | 2008 Summer | |
| Piotr Markiewicz | Poland | Canoe sprint | 1996 Summer | |
| Aleksandr Markin | Soviet Union | Athletics | 1988 Summer | |
| Viktor Markin | 1980 Summer | |
| Kari Markkanen | Finland | Canoe sprint | 1972 Summer, 1976 Summer | |
| Matti Markkanen | Artistic gymnastics | 1908 Summer | |
| Terhi Markkanen | Biathlon | 1992 Winter | |
| Väinö Markkanen | Shooting | 1964 Summer | |
| Margarete Markl | Austria | Art competitions | 1948 Summer | |
| Hanna Marklund | Sweden | Football | 2000 Summer, 2004 Summer | |
| Pether Markne | Equestrian dressage | 2000 Summer | |
| Markoji Markoji [ Wikidata ] | Indonesia | Beach volleyball | 1996 Summer | |
| Dimitrios Markos | Greece | Swimming | 2020 Summer, 2024 Summer | |
| Suren Markosyan | Armenia | Wrestling | 2008 Summer | |
| Georgios Markoulas | Greece | Weightlifting | 2004 Summer | |
| Aleksandr Markov | Russia | Equestrian eventing | 2016 Summer | |
| Alexei Markov | Track cycling | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Andrei Markov | Ice hockey | 2006 Winter, 2010 Winter, 2014 Winter | |
| Asen Markov | Bulgaria | Athletics | 1992 Summer | |
| Danny Markov | Russia | Ice hockey | 2002 Winter, 2006 Winter | |
| Dmitri Markov | Belarus, Australia | Athletics | 1996 Summer, 2000 Summer, 2004 Summer | |
| Dragomir Markov | Bulgaria | Swimming | 1992 Summer | |
| Gennadiy Markov | Russia | Athletics | 2000 Summer | |
| Georgi Markov | Bulgaria | Wrestling | 1972 Summer | |
| Georgi Markov | Weightlifting | 2000 Summer | |
| Ilya Markov | Russia | Athletics | 1996 Summer, 2000 Summer, 2008 Summer | |
| Ivan Markov | Bulgaria | Weightlifting | 2012 Summer | |
| Khristo Markov | Athletics | 1988 Summer, 1992 Summer | |
| Lyubomir Markov | Boxing | 1952 Summer | |
| Viktor Markov | Russia | Sailing | 1912 Summer | |
| Vladimir Markov [ Wikidata ] | Football | 1912 Summer | |
| Miglena Markova | Bulgaria | Rowing | 2004 Summer | |
| Zuzana Marková | Czechoslovakia | Swimming | 1972 Summer | |
| Ida Marko-Varga | Sweden | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Dobrivoje Marković | Serbia | Handball | 2012 Summer | |
| Đorđe Marković | Swimming | 2012 Summer | |
| Dušan Marković | Kazakhstan | Water polo | 2020 Summer | |
| Leposava Marković | Independent Olympians | Judo | 1992 Summer | |
| Ljiljana Marković | Yugoslavia | Handball | 1988 Summer | |
| Martin Marković | Croatia | Athletics | 2024 Summer | |
| Milan Marković | Serbia and Montenegro | Volleyball | 2004 Summer | |
| Miloš Marković | Yugoslavia | Water polo | 1972 Summer, 1976 Summer | |
| Nemanja Marković [ Wikidata ] | Shooting | 1952 Summer | |
| Pavo Marković | Croatia | Water polo | 2008 Summer | |
| Stefan Marković | Serbia | Basketball | 2016 Summer | |
| Vladan Marković | Serbia and Montenegro, Serbia | Swimming | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer | |
| Žarko Marković | Qatar | Handball | 2016 Summer | |
| Krystsina Markovich | Belarus | Artistic swimming | 2000 Summer, 2004 Summer | |
| Yuliya Markovich | Kazakhstan | Handball | 2008 Summer | |
| Kálmán Markovits | Hungary | Water polo | 1952 Summer, 1956 Summer, 1960 Summer | |
| László Markovits | Tennis | 1988 Summer, 1996 Summer | |
| Gjorgi Markovski | North Macedonia | Alpine skiing | 2006 Winter | |
| Ivan Markovski | Bulgaria | Ice hockey | 1976 Winter | |
| John Markovski | Australia | Football | 1992 Summer | |
| Aleksey Markovsky | Soviet Union | Swimming | 1980 Summer | |
| Caroline Marks | United States | Surfing | 2020 Summer, 2024 Summer | |
| Deryck Marks | Jamaica | Swimming | 1984 Summer | |
| Geoffrey Marks | Sri Lanka | 1952 Summer | |
| Sean Marks | New Zealand | Basketball | 2000 Summer, 2004 Summer | |
| Shani Marks | United States | Athletics | 2008 Summer | |
| Thomas Marks | Canada | Water polo | 2008 Summer | |
| Toni Marks | South Africa | Field hockey | 2020 Summer | |
| Didrik Marksten | Norway | Alpine skiing | 1992 Winter | |
| Hans Markström | Sweden | Speed skating | 1992 Winter, 1994 Winter | |
| Karl Markt | Austria | Cycling mountain bike | 2012 Summer | |
| Rovena Marku | Albania | Swimming | 2004 Summer, 2008 Summer | |
| Marsel Markulin | Yugoslavia | Artistic gymnastics | 1960 Summer | |
| Bertram Markus | Canada | Fencing | 1932 Summer | |
| Ernő Márkus | Hungary | Wrestling | 1912 Summer | |
| Erzsébet Márkus | Weightlifting | 2000 Summer | |
| Fred Markus | Canada | Road cycling, Track cycling | 1956 Summer | |
| Halyna Markushevska | Ukraine | Handball | 2004 Summer | |
| Rudolf Markušić | Yugoslavia | Athletics | 1936 Summer | |
| Michael Markussen | Denmark | Road cycling, Track cycling | 1980 Summer, 1984 Summer | |
| Niels Markussen | Sailing | 1960 Summer, 1968 Summer | |
| Nikolaj Markussen | Handball | 2012 Summer | |
| Vivi Markussen | Athletics | 1960 Summer | |
| Svavar Markússon | Iceland | 1960 Summer | |
| Ago Markvardt | Estonia | Nordic combined | 1992 Winter, 1994 Winter, 1998 Winter | |
| Diego Markwell | Netherlands | Baseball | 2004 Summer, 2008 Summer | |
| Elke Markwort | West Germany | Rowing | 1988 Summer | |
| Robert Marland | Canada | 1988 Summer, 1992 Summer | |
| Marie-Ève Marleau | Diving | 2008 Summer | |
| Patrick Marleau | Ice hockey | 2010 Winter, 2014 Winter | |
| Claudia Roberta Marletta [ Wikidata ] | Italy | Water polo | 2024 Summer | |
| Jack Marley | Ireland | Boxing | 2024 Summer | |
| Janet Marlow | Great Britain | Athletics | 1980 Summer | |
| Peter Marlow | 1972 Summer | |
| Chris Marlowe | United States | Volleyball | 1984 Summer | |
| Missy Marlowe | Artistic gymnastics | 1988 Summer | |
| Georgios Marmaridis | Greece | Shooting | 1960 Summer | |
| Luis Marmentini | Chile | Basketball | 1948 Summer | |
| Adriana Marmolejo | Mexico | Swimming | 2000 Summer, 2004 Summer, 2008 Summer | |
| Ricardo Marmolejo | 1972 Summer, 1976 Summer | |
| Louise Marmont | Sweden | Curling | 1998 Winter, 2002 Winter | |
| Antonio Marmorino | Italy | Canoe sprint | 1996 Summer | |
| Anémone Marmottan | France | Alpine skiing | 2010 Winter, 2014 Winter | |
| Mohamed Marmouri | Tunisia | Boxing | 1996 Summer, 2000 Summer | |
| Valentina Marocchi | Italy | Diving | 2004 Summer, 2008 Summer | |
| Auguste Philippe Marocco | Monaco | Art competitions | 1928 Summer, 1936 Summer | |
| Mourad Marofit | Morocco | Athletics | 2008 Summer | |
| Barbara Marois | United States | Field hockey | 1988 Summer, 1996 Summer | |
| Philippe Marois | Canada | Speed skating | 2002 Winter | |
| Anca Măroiu | Romania | Fencing | 2012 Summer | |
| Zoran Marojević | Yugoslavia | Basketball | 1968 Summer | |
| Bill Marolt | United States | Alpine skiing | 1964 Winter | |
| Max Marolt | 1960 Winter | |
| McKayla Maroney | Artistic gymnastics | 2012 Summer | |
| Thomas Maroney | Athletics | 1920 Summer | |
| Kenneth Maronie | Dominica | Swimming | 2000 Summer | |
| Magda Maros | Hungary | Fencing | 1976 Summer, 1980 Summer | |
| Ádám Marosi | Modern pentathlon | 2012 Summer, 2016 Summer, 2020 Summer | |
| Attila Marosi | Alpine skiing | 2006 Winter | |
| István Marosi | Handball | 1972 Summer | |
| József Marosi | Fencing | 1956 Summer, 1960 Summer | |
| Katalin Marosi | Tennis | 2000 Summer | |
| László Marosi | Handball | 1988 Summer, 1992 Summer | |
| Paula Marosi | Fencing | 1964 Summer, 1968 Summer | |
| Kornél Marosvári | Shooting | 1972 Summer | |
| Péter Marót | Fencing | 1972 Summer, 1976 Summer | |
| Véronique Marot | Great Britain | Athletics | 1992 Summer | |
| István Maróthy | Hungary | Wrestling | 1972 Summer | |
| József Maróthy [ Wikidata ] | 1908 Summer | |
| Magdalena Marotineanu | Romania | Alpine skiing | 1956 Winter | |
| Miguel Ángel Maroto | Spain | Volleyball | 1992 Summer | |
| Raúl Maroto | Fencing | 1988 Summer, 1992 Summer, 1996 Summer | |
| Alfonso Marotta | Italy | Modern pentathlon | 1952 Summer | |
| Maxime Marotte | France | Cycling mountain bike | 2016 Summer | |
| Mariann Mimi Maróty | Hungary | Alpine skiing | 2018 Winter | |
| Saeid Marouf | Iran | Volleyball | 2016 Summer, 2020 Summer | |
| Helen Maroulis | United States | Wrestling | 2016 Summer, 2020 Summer, 2024 Summer | |
| Antonio Marovelli [ Wikidata ] | Italy | Artistic gymnastics | 1920 Summer | |
| Dejan Marović | Yugoslavia | Boxing | 1980 Summer | |
| Marija Marović | Croatia | Shooting | 2016 Summer | |
| Milun Marović | Yugoslavia | Basketball | 1972 Summer | |
| Uroš Marović | Water polo | 1968 Summer, 1972 Summer, 1976 Summer | |
| Robert Maroye | Belgium | Field hockey | 1976 Summer | |
| Henadz Maroz | Belarus | Athletics | 2004 Summer | |
| Miglė Lendel | Lithuania | Track cycling | 2020 Summer | |
| Paul Marozeau | France | Art competitions | 1928 Summer | |
| Dzsenifer Marozsán | Germany | Football | 2016 Summer | |
| Fábián Marozsán | Hungary | Tennis | 2024 Summer | |
| Dawn Marple | United States | Handball | 1996 Summer | |
| Darcy Marquardt | Canada | Rowing | 2004 Summer, 2008 Summer, 2012 Summer | |
| Simon Marquart | Switzerland | Cycling BMX racing | 2020 Summer, 2024 Summer | |
| William Marquart | Canada | Boxing | 1936 Summer | |
| Zoi Mafalda Marques de Lima | Portugal | Artistic gymnastics | 2012 Summer | |
| Hélio Marques Pereira | Brazil | Basketball | 1952 Summer | |
| Águeda Marqués | Spain | Athletics | 2024 Summer | |
| Armando Marques | Portugal | Shooting | 1964 Summer, 1972 Summer, 1976 Summer | |
| Duarte Marques | Triathlon | 2008 Summer | |
| Eduardo Marques [ Wikidata ] | Sailing | 2024 Summer | |
| Eric Marques | Brazil | Modern pentathlon | 1952 Summer | |
| Fernanda Marques | Portugal | Athletics | 1992 Summer | |
| Henrique Marques | Brazil | Fencing | 2016 Summer | |
| Henrique Marques | Taekwondo | 2024 Summer | |
| José Marques | Portugal | Wrestling | 1988 Summer | |
| Mário Marques | Swimming | 1924 Summer | |
| Mario Marques | Brazil | Athletics | 1932 Summer | |
| Nuno Marques | Portugal | Tennis | 2000 Summer | |
| Priscila Marques | Brazil | Judo | 2000 Summer | |
| Wlamir Marques | Basketball | 1956 Summer, 1960 Summer, 1964 Summer, 1968 Summer | |
| Yane Marques | Modern pentathlon | 2008 Summer, 2012 Summer, 2016 Summer | |
| Luc Marquet | France | Volleyball | 1992 Summer | |
| Mathieu Marquet | Mauritius | Swimming | 2012 Summer, 2020 Summer | |
| Maurice Marquet | New Zealand | Field hockey | 1984 Summer | |
| Louis De Marquevic | France | Art competitions | 1948 Summer | |
| Rafael Márquez Lugo | Mexico | Football | 2004 Summer | |
| Alexis Márquez | Venezuela | Swimming | 2008 Summer | |
| Alfonso Marquez | Philippines | Basketball | 1960 Summer, 1968 Summer | |
| Baltasar Márquez | Spain | Rowing | 1988 Summer | |
| Celina Márquez | El Salvador | Swimming | 2020 Summer, 2024 Summer | |
| David Márquez | Spain | Athletics | 2000 Summer | |
| Dayron Márquez | Colombia | 2012 Summer | |
| Esperanza Márquez | Spain | Rowing | 1996 Summer | |
| Félix Márquez | Venezuela | Boxing | 1968 Summer | |
| Gabriel Márquez | Mexico | Football | 1976 Summer | |
| Generoso Márquez | Cuba | Basketball | 1980 Summer | |
| Herbys Márquez | Venezuela | Weightlifting | 2008 Summer | |
| Iván Márquez | Volleyball | 2008 Summer | |
| Raúl Márquez | United States | Boxing | 1992 Summer | |
| Roberto Márquez | Argentina | Field hockey | 1948 Summer | |
| Salvador Márquez | Mexico | Football | 1972 Summer | |
| Walter Márquez | Uruguay | Basketball | 1964 Summer | |
| Franco Marquicias | Philippines | 1936 Summer | |
| Leonardo Marquicias | 1956 Summer | |
| António Marquilhas | Portugal | Fencing | 1960 Summer | |
| João Marquilhas | 1984 Summer | |
| Marquinhos | Brazil | Football | 2016 Summer | |
| Christian Marquis | France | Rowing | 1980 Summer | |
| Gail Marquis | United States | Basketball | 1976 Summer | |
| Gilbert Marquis | Switzerland | Athletics | 1952 Summer | |
| Louis Marquis | 1960 Summer | |
| Philippe Marquis | Canada | Freestyle skiing | 2014 Winter, 2018 Winter | |
| Sérgio Marques | Portugal | Sailing | 1956 Summer | |
| Vincent Marquis | Canada | Freestyle skiing | 2010 Winter | |
| Teófila Márquiz | Venezuela | Fencing | 1960 Summer | |
| Hans Marr | Germany | Ski jumping | 1936 Winter | |
| Adelia Marra | Italy | Speed skating | 2006 Winter | |
| Francesco Marrai | Sailing | 2016 Summer | |
| Andrea Marrazzi | Fencing | 1920 Summer | |
| Fausto Marreiros | Portugal | Speed skating | 1998 Winter | |
| Carlos Marrero | Venezuela | Shooting | 1952 Summer | |
| Ismaray Marrero | Cuba | Rowing | 2004 Summer, 2008 Summer | |
| José Marrero | Canoe sprint | 1980 Summer | |
| Norge Marrero | Rowing | 1964 Summer, 1968 Summer | |
| Raúl Marrero | Boxing | 1968 Summer | |
| Eduar Marriaga | Colombia | 2012 Summer | |
| Miguel Marriaga | Venezuela | Basketball | 2016 Summer | |
| Veronique Marrier D'Unienville | Mauritius | Archery | 2008 Summer | |
| Gareth Marriott | Great Britain | Canoe slalom | 1992 Summer, 1996 Summer | |
| Marius Marro | Switzerland | Equestrian eventing | 1996 Summer | |
| Rudolf Marro | Wrestling | 1980 Summer | |
| Fabrizia Marrone [ Wikidata ] | Italy | Softball | 2020 Summer | |
| Fernando Marroquin | Guatemala | Track cycling | 1952 Summer | |
| Fernando Marroquin | Swimming | 1984 Summer | |
| José Marroquín | Shooting | 1968 Summer | |
| Carlos Marryatt | New Zealand | Track cycling | 1992 Summer | |
| Hans-Joachim Mars | Germany | Shooting | 1960 Summer | |
| Dato Marsagishvili | Georgia | Wrestling | 2012 Summer | |
| Francesca Marsaglia | Italy | Alpine skiing | 2014 Winter, 2022 Winter | |
| Lorenzo Marsaglia | Diving | 2020 Summer, 2024 Summer | |
| Matteo Marsaglia | Alpine skiing | 2018 Winter, 2022 Winter | |
| Catherine Marsal | France | Road cycling | 1988 Summer, 1992 Summer, 1996 Summer, 2000 Summer | |
| Pierre Marsan | Monaco | Shooting | 1936 Summer, 1948 Summer, 1952 Summer, 1960 Summer | |
| Petra Marschalkó [ Wikidata ] | Hungary | Artistic swimming | 2000 Summer | |
| Kurtis Marschall | Australia | Athletics | 2016 Summer, 2020 Summer, 2024 Summer | |
| Joachim Marscheider | Germany | Shooting | 1964 Summer | |
| Ben Marsden | Great Britain | Field hockey | 2008 Summer | |
| Brian Marsden | New Zealand | Weightlifting | 1972 Summer, 1976 Summer | |
| Daniel Marsden | Australia | Water polo | 1992 Summer, 2000 Summer | |
| Karen Marsden | Field hockey | 1996 Summer | |
| William Marsden | Great Britain | Shooting | 1908 Summer | |
| Wagner Marseille | Haiti | Athletics | 1996 Summer | |
| Georgios Marsellos | Greece | 1960 Summer, 1964 Summer | |
| Allan Marsh | Jamaica | Swimming | 1984 Summer | |
| Ann Marsh | United States | Fencing | 1992 Summer, 1996 Summer, 2000 Summer | |
| Byron Marsh | Cayman Islands | Sailing | 1992 Summer | |
| David Marsh | Great Britain | Road cycling | 1920 Summer, 1924 Summer | |
| Edward Marsh | United States | Rowing | 1900 Summer | |
| Fred Marsh | Great Britain | Weightlifting | 1936 Summer | |
| George Marsh | Canada | Shooting | 1964 Summer | |
| Henry Marsh | United States | Athletics | 1976 Summer, 1984 Summer, 1988 Summer | |
| Michael Marsh | 1992 Summer, 1996 Summer | |
| Peter Marsh | Great Britain | Field hockey | 1972 Summer | |
| Reginald Marsh | United States | Art competitions | 1932 Summer, 1936 Summer | |
| Robert Marsh | Antigua and Barbuda | Road cycling | 1992 Summer | |
| Sidney Marsh | Australia | Wrestling | 1964 Summer, 1968 Summer | |
| Stephen Marsh | Great Britain | Luge | 1972 Winter | |
| William Marsh | Fencing | 1908 Summer, 1912 Summer, 1920 Summer, 1924 Summer | |
| Ann Marshall | United States | Swimming | 1972 Summer | |
| Archie Marshall | Great Britain | Speed skating | 1976 Winter, 1980 Winter | |
| Benjamin H. Marshall | United States | Art competitions | 1928 Summer | |
| Beryl Marshall | Argentina | Swimming | 1948 Summer | |
| Brian Marshall | Canada | Athletics | 1988 Summer | |
| Bronwyn Marshall | Australia | Basketball | 1984 Summer | |
| Charles Marshall | Great Britain | Road cycling | 1928 Summer | |
| Charlie Marshall | Rugby | 1908 Summer | |
| Chelsea Marshall | United States | Alpine skiing | 2010 Winter | |
| Christine Marshall | Swimming | 2008 Summer | |
| Clive Marshall | Great Britain | Rowing | 1960 Summer | |
| Dennis Marshall | Costa Rica | Football | 1980 Summer | |
| Edward Marshall | United States | Rowing | 1932 Summer | |
| Elicia Marshall | Artistic swimming | 2000 Summer | |
| George Marshall | Great Britain | Athletics | 1896 Summer | |
| Jacqui Marshall | Australia | Rowing | 1984 Summer | |
| Jennie Marshall | United States | 1988 Summer | |
| John Marshall | Australia | Swimming | 1948 Summer, 1952 Summer, 1956 Summer | |
| John Marshall | United States | Sailing | 1972 Summer | |
| John Marshall | Athletics | 1984 Summer | |
| Jonathon Marshall | Great Britain | Swimming | 2024 Summer | |
| Kevin Marshall | Canada | Speed skating | 1998 Winter, 2002 Winter | |
| Kirstie Marshall | Australia | Freestyle skiing | 1994 Winter, 1998 Winter | |
| Kyle Marshall | Ireland | Field hockey | 2024 Summer | |
| Leonel Marshall Jr. | Cuba | Volleyball | 2000 Summer | |
| Leonel Marshall Sr. | 1976 Summer, 1980 Summer | |
| Maurice Marshall | New Zealand | Athletics | 1952 Summer | |
| Melanie Marshall | Great Britain | Swimming | 2004 Summer, 2008 Summer | |
| Neal Marshall | Canada | Speed skating | 1992 Winter, 1994 Winter, 1998 Winter | |
| O'Neal Marshall | Barbados | Sailing | 1996 Summer, 2000 Summer | |
| Pam Marshall | United States | Athletics | 1988 Summer | |
| Pat Marshall | Trinidad and Tobago | 1972 Summer | |
| Paul Marshall | Great Britain | Swimming | 1980 Summer | |
| Penelope Marshall | New Zealand | 2012 Summer | |
| Ralph Marshall | United States | Shooting | 1936 Summer | |
| Savannah Marshall | Great Britain | Boxing | 2012 Summer, 2016 Summer | |
| Sperry Marshall | Australia | Shooting | 1972 Summer | |
| Steve Marshall | Canada | Wrestling | 1988 Summer | |
| Steven Marshall | Volleyball | 2016 Summer, 2020 Summer | |
| Dmitriy Marshin | Azerbaijan | Athletics | 2012 Summer | |
| Márk Marsi | Hungary | Fencing | 1996 Summer, 2000 Summer | |
| Trevor Marsicano | United States | Speed skating | 2010 Winter | |
| Aluísio Marsili | Brazil | Water polo | 1968 Summer | |
| Arnaldo Marsili | 1968 Summer | |
| Guglielmo Marsili | Italy | 1972 Summer | |
| Sante Marsili | 1972 Summer, 1976 Summer, 1980 Summer | |
| Max Marsille | Belgium | Boxing | 1952 Summer | |
| Glenn Marsland | Australia | Basketball | 1972 Summer | |
| Gooitske Marsman | Netherlands | Judo | 1992 Summer | |
| Margot Marsman | Swimming | 1948 Summer | |
| Josée Marsolais | Canada | Water polo | 2000 Summer | |
| Marcus Marsollek | West Germany | Modern pentathlon | 1988 Summer | |
| Alberto Marson | Brazil | Basketball | 1948 Summer | |
| Lou Marson | United States | Baseball | 2008 Summer | |
| Denise Marston-Smith | Great Britain | Field hockey | 2000 Summer | |
| Göran Marström | Sweden | Sailing | 1980 Summer, 1984 Summer, 1988 Summer, 1992 Summer | |
| Andrzej Marszałek | Poland | Rowing | 1992 Summer | |
| Léon Mart | Luxembourg | Football | 1936 Summer | |
| Marta | Brazil | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Nuno Marta | Portugal | Road cycling | 1996 Summer | |
| Konstantin Martazov | Soviet Union | Shooting | 1952 Summer | |
| Hans Marte | Austria | Wrestling | 1960 Summer, 1964 Summer | |
| Niverka Marte | Dominican Republic | Volleyball | 2012 Summer, 2020 Summer, 2024 Summer | |
| Rodrigo Marte | Boxing | 2020 Summer | |
| Mickaël Marteau | France | Rowing | 2016 Summer | |
| René Marteaux | Belgium | Artistic gymnastics | 1960 Summer | |
| Diego Martel | Spain | Swimming | 1968 Summer | |
| Florio Martel | France | Field hockey | 1952 Summer | |
| Jacqueline Martel | Alpine skiing | 1952 Winter | |
| Jan Martel | Art competitions | 1948 Summer | |
| Joël Martel | 1948 Summer | |
| Marguerite Martel | Athletics | 1948 Summer | |
| Jean-Henrik Martell | Sweden | Rowing | 1976 Summer | |
| Luis Martell | Mexico | Volleyball | 1968 Summer | |
| Patrice Martell | Alpine skiing | 1988 Winter | |
| Adrienne Martelli | United States | Rowing | 2012 Summer, 2016 Summer | |
| Vera Martelli | Italy | Athletics | 1952 Summer | |
| Floriano Martello | Speed skating | 1976 Winter | |
| Maritza Martén | Cuba | Athletics | 1992 Summer, 1996 Summer | |
| Steve Marten | New Zealand | Sailing | 1972 Summer | |
| Camille Martens | Canada | Rhythmic gymnastics | 1996 Summer | |
| Eckhard Martens | East Germany | Rowing | 1972 Summer | |
| Hans Martens | Germany | Athletics | 1936 Summer | |
| Hermann Martens | Track cycling | 1908 Summer | |
| Leonie Märtens [ Wikidata ] | Marathon swimming, Swimming | 2024 Summer | |
| Lieke Martens | Netherlands | Football | 2020 Summer | |
| Lukas Märtens | Germany | Swimming | 2020 Summer, 2024 Summer | |
| Maarten Martens | Belgium | Football | 2008 Summer | |
| Stéphan Martens | Track cycling | 1952 Summer | |
| Agneta Mårtensson | Sweden | Swimming | 1980 Summer, 1984 Summer | |
| Anders Mårtensson | Equestrian vaulting | 1920 Summer | |
| Frithiof Mårtensson | Wrestling | 1908 Summer | |
| Pia Mårtensson | Swimming | 1976 Summer | |
| Stig Mårtensson | Road cycling | 1952 Summer | |
| Torbjörn Mårtensson | Athletics | 1996 Summer | |
| Maximilian Marterer | Germany | Tennis | 2024 Summer | |
| Leszek Martewicz | Poland | Fencing | 1976 Summer | |
| Joe Martey | Ghana | Boxing | 1968 Summer | |
| Nathaniel Martey | Athletics | 2000 Summer | |
| Soraima Martha | Netherlands Antilles | 1984 Summer | |
| William Marthé | Switzerland | 1924 Summer | |
| George Marthins | India | Field hockey | 1928 Summer | |
| Jim Marthinsen | Norway | Ice hockey | 1980 Winter, 1984 Winter, 1992 Winter, 1994 Winter | |
| Alina Marti | Switzerland | 2022 Winter | |
| Carlos Martí | Spain | Water polo | 1948 Summer | |
| Daniel Martí | Athletics | 1992 Summer | |
| Debbie Marti | Great Britain | 1992 Summer, 1996 Summer | |
| Jaime Martí | Spain | Fencing | 2008 Summer | |
| Jorge Martí | Sailing | 1960 Summer | |
| Liselotte Marti | Switzerland | Artistic gymnastics | 1972 Summer | |
| Melanie Marti | 2004 Summer | |
| Rudolf Marti | Bobsleigh | 1976 Winter, 1980 Winter | |
| Walter Marti | Boxing | 1936 Summer | |
| Nicola Martial | Guyana | Athletics | 1996 Summer | |
| José Antonio Martiarena | Spain | Track cycling | 1988 Summer | |
| Pavao Martić | Yugoslavia | Rowing | 1964 Summer | |
| Petra Martić | Croatia | Tennis | 2024 Summer | |
| Jean-Jacques Martigne | France | Rowing | 1984 Summer, 1988 Summer | |
| Adolf Martignoni | Switzerland | Ice hockey | 1936 Winter | |
| Arnold Martignoni | 1928 Winter | |
| Alberto Martijena | Argentina | Shooting | 1956 Summer | |
| Michal Martikán | Slovakia | Canoe slalom | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Robert Martin | United States | Bobsleigh | 1936 Winter | |
| Daniel Martin Dockx | Spain | Equestrian dressage | 2012 Summer, 2016 Summer | |
| Antonio Martín Espina | Basketball | 1988 Summer | |
| Kim Martin Hasson | Sweden | Ice hockey | 2002 Winter, 2006 Winter, 2010 Winter, 2014 Winter | |
| Úrsula Martín | Spain | Judo | 2000 Summer | |
| Miguel Ángel Martín Perdiguero | Road cycling | 2000 Summer | |
| Abigail Martin | Great Britain | Artistic gymnastics | 2024 Summer | |
| Adriana Martín | Spain | Archery | 2016 Summer | |
| Alister Martin | Ireland | Cycling mountain bike | 1996 Summer | |
| Albert Martin | Great Britain | Sailing | 1908 Summer | |
| Alexander Martin | Shooting | 1924 Summer | |
| Alfredo Martín | Argentina | Rowing | 1972 Summer | |
| Alphonse Martin | Belgium | Water polo | 1948 Summer, 1952 Summer | |
| Álvaro Martín | Spain | Athletics | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Amy Martin | United States | Rowing | 2000 Summer | |
| André Martin | France | Shooting | 1952 Summer | |
| Andrea Martin | West Germany | Canoe sprint | 1988 Summer | |
| Andrej Martin | Slovakia | Tennis | 2016 Summer | |
| Andrés Martín | Spain | Boxing | 1968 Summer | |
| Andrew Martin | Guam | Track cycling | 1992 Summer | |
| Andrew Martin | Australia | Athletics | 2000 Summer | |
| Andy Martin | Great Britain | Modern pentathlon | 1948 Summer | |
| Anne Martin | United States | Rowing | 1988 Summer | |
| Annie Martin | Canada | Beach volleyball | 2004 Summer, 2012 Summer | |
| Anouchka Martin | France | Swimming | 2020 Summer | |
| Anthony Martin | Australia | Weightlifting | 2000 Summer | |
| Anthony Martin | Water polo | 2008 Summer | |
| Antoine Martin | France | Boxing | 1952 Summer | |
| Arthur Martin [ Wikidata ] | Canada | Shooting | 1908 Summer | |
| Bärbel Martin | Germany | Figure skating | 1960 Winter | |
| Beatriz Martín | Spain | Judo | 2000 Summer | |
| Benjamin Martin | Canada | Field hockey | 2016 Summer | |
| Bernadette Martin | France | Athletics | 1972 Summer | |
| Bernard Martin | 1964 Summer | |
| Bob Martin | United States | Rowing | 1948 Summer | |
| Bombette Martin | Great Britain | Skateboarding | 2020 Summer | |
| Boyd Martin | United States | Equestrian eventing | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Brad Martin | Canada | Snowboarding | 2006 Winter, 2010 Winter, 2014 Winter | |
| Brian Martin | United States | Luge | 1998 Winter, 2002 Winter, 2006 Winter, 2010 Winter | |
| Camilla Martin | Denmark | Badminton | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer | |
| Carmen Martín | Spain | Handball | 2012 Summer, 2016 Summer, 2020 Summer | |
| Christopher Martin | Canada | Bobsleigh | 1976 Winter | |
| Chuck Martin | United States | Freestyle skiing | 1992 Winter | |
| Claude Martin | France | Rowing | 1952 Summer, 1960 Summer | |
| Corina Martín | Argentina | Canoe sprint | 1988 Summer | |
| Cyril Martin | South Africa | Wrestling | 1952 Summer | |
| Damian Martin | Australia | Basketball | 2016 Summer | |
| Damir Martin | Croatia | Rowing | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Dan Martin | Ireland | Road cycling | 2012 Summer, 2016 Summer, 2020 Summer | |
| Daniel Martin | Romania | Swimming | 2020 Summer | |
| David Martin | France | Trampolining | 2000 Summer, 2004 Summer | |
| David Martín | Spain | Water polo | 2008 Summer, 2012 Summer | |
| Diana Martín | Athletics | 2012 Summer, 2016 Summer | |
| Don Martin | Australia | Field hockey | 1968 Summer | |
| Donna Martin | Rowing | 2004 Summer | |
| Doug Martin | Canada | Swimming | 1976 Summer | |
| Dylan Martin | Australia | Field hockey | 2020 Summer | |
| Eamonn Martin | Great Britain | Athletics | 1984 Summer, 1988 Summer, 1992 Summer | |
| Édouard Martin [ Wikidata ] | France | Wrestling | 1912 Summer | |
| Eliseo Martín | Spain | Athletics | 2000 Summer, 2004 Summer, 2008 Summer | |
| Emil Martin | Germany | Shooting | 1936 Summer | |
| Emily Martin | Australia | Rowing | 2000 Summer | |
| Enrique Martín | Mexico | Football | 1972 Summer | |
| Ernest Martin | France | Swimming, Water polo | 1900 Summer | |
| Fernando Martín | Spain | Basketball | 1984 Summer | |
| Floyd Martin | Canada | Ice hockey | 1956 Winter, 1960 Winter | |
| Francisco Martín | Spain | Athletics | 1976 Summer | |
| Frank Martin | Sweden | Equestrian jumping | 1920 Summer | |
| Frankie Martin | Canada | Boxing | 1928 Summer | |
| Fred Martin | Australia | Athletics | 1984 Summer | |
| Gael Martin | 1980 Summer, 1984 Summer | |
| Gerda Martín | Chile | 1952 Summer | |
| Gianfranco Martin | Italy | Alpine skiing | 1992 Winter, 1994 Winter | |
| Guillaume Martin | France | Road cycling | 2020 Summer | |
| Hannah French | Great Britain | Field hockey | 2020 Summer, 2024 Summer | |
| Harry Martin | Canada | Road cycling | 1920 Summer | |
| Harry Martin | Great Britain | Field hockey | 2012 Summer, 2016 Summer | |
| Henry Martín | Mexico | Football | 2020 Summer | |
| Ignacio Martín | Spain | Rugby sevens | 2016 Summer | |
| Isidro Martín | Rowing | 1980 Summer, 1984 Summer | |
| Jackie Martin | South Africa | Road cycling | 1992 Summer, 1996 Summer | |
| Jan Martin | New Zealand | Field hockey | 1984 Summer | |
| Jay Martin | United States | Ski jumping | 1968 Winter | |
| Jean-Louis Martin | France | Equestrian eventing | 1968 Summer | |
| Jenna Martin | Canada | Athletics | 2012 Summer | |
| Jerry Martin | United States | Ski jumping | 1972 Winter, 1976 Winter | |
| Jess Martin | Great Britain | Athletics | 2016 Summer | |
| Johann Martin [ Wikidata ] | Russia, Estonia | 1912 Summer, 1920 Summer | |
| John Martin | Great Britain | Shooting | 1908 Summer | |
| Kevin Martin | Ireland | Boxing | 1948 Summer, 1952 Summer | |
| Kevin Martin | Canada | Curling | 2002 Winter, 2010 Winter | |
| Larry Martin | United States | Cross country skiing | 1972 Winter | |
| Laurel Martin | Field hockey | 1996 Summer | |
| LaVonna Martin | Athletics | 1988 Summer, 1992 Summer | |
| Leo J. Martin | Bobsleigh | 1948 Winter | |
| Leodigard Martin | Tanzania | Athletics | 1980 Summer | |
| Leonard Martin | Great Britain | Sailing | 1936 Summer | |
| Linda Ann Martin | Fencing | 1980 Summer, 1984 Summer, 1988 Summer | |
| Lisa Martin | Australia | Athletics | 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer | |
| Lise Martin | Canada | Volleyball | 1984 Summer | |
| Logan Martin | Australia | Cycling BMX freestyle | 2020 Summer, 2024 Summer | |
| Lorena Martín | Spain | Athletics | 2024 Summer | |
| Louis Martin | France | Swimming, Water polo | 1900 Summer | |
| Louis Martin | Great Britain | Weightlifting | 1960 Summer, 1964 Summer, 1968 Summer | |
| Lucy Martin | Road cycling | 2012 Summer | |
| Ludovic Martin | Switzerland | Trampolining | 2004 Summer | |
| Luis Miguel Martín | Spain | Athletics | 2000 Summer, 2004 Summer | |
| Manuel Martin | United States | Football | 1948 Summer | |
| María Martín | Spain | Rhythmic gymnastics | 1988 Summer | |
| Matt Martin | United States | Ice hockey | 1994 Winter | |
| Maurice Martin | France | Weightlifting | 1924 Summer | |
| Miklós Martin | Hungary | Water polo | 1952 Summer | |
| Milo Martin | Switzerland | Art competitions | 1928 Summer | |
| Mónica Martín | Spain | Artistic gymnastics | 1996 Summer | |
| Montserrat Martin | Archery | 1984 Summer | |
| Neil Martin | Australia | Swimming | 1972 Summer | |
| Neil Martin | Great Britain | Road cycling | 1980 Summer, 1984 Summer | |
| Olga Martín | Spain | Volleyball | 1992 Summer | |
| Oliver Martin | United States | Track cycling, Road cycling | 1964 Summer, 1968 Summer | |
| Osmani Martín | Cuba | Rowing | 2000 Summer | |
| Patrice Martin | Benin | Boxing | 1980 Summer | |
| Patrick Martin | United States | Bobsleigh | 1948 Winter, 1952 Winter | |
| Paul Martin | Switzerland | Athletics, Art competitions | 1920 Summer, 1924 Summer, 1928 Summer, 1932 Summer, 1936 Summer | |
| Paul Martin | Germany | Bobsleigh | 1928 Winter | |
| Paul Martin | United States | Ice hockey | 2014 Winter | |
| Raúl Martín | Cuba | Swimming | 1956 Summer | |
| Raymond Martin | France | Road cycling | 1972 Summer | |
| Raymond Martin | Australia | Canoe sprint | 1984 Summer | |
| Răzvan Martin | Romania | Weightlifting | 2008 Summer, 2012 Summer | |
| Red Martin | United States | Ice hockey | 1964 Winter | |
| Reginald Martin | Great Britain | Lacrosse | 1908 Summer | |
| Rhoda Martin | Canada | Fencing | 1948 Summer | |
| Rhona Martin | Great Britain | Curling | 2002 Winter, 2006 Winter | |
| Roderick Martin | Sweden | Modern pentathlon | 1984 Summer, 1988 Summer | |
| Rodney Martin | United States | Athletics | 2008 Summer | |
| Ross Martin | Australia | Cross country skiing | 1968 Winter | |
| Roxbert Martin | Jamaica | Athletics | 1996 Summer | |
| Roy Martin | United States | 1988 Summer | |
| Scott Martin | Australia | 2008 Summer, 2012 Summer | |
| Séra Martin | France | 1928 Summer, 1932 Summer | |
| Seth Martin | Canada | Ice hockey | 1964 Winter | |
| Steffi Martin | East Germany | Luge | 1984 Winter, 1988 Winter | |
| Stephen Martin | Great Britain | Field hockey | 1984 Summer, 1988 Summer, 1992 Summer | |
| Thomas Martin | United States | Judo | 1976 Summer | |
| Todd Martin | Tennis | 2000 Summer | |
| Tony Martin | Rowing | 1968 Summer | |
| Tony Martin | Germany | Road cycling | 2012 Summer, 2016 Summer | |
| Tyler Martin | Australia | Water polo | 2016 Summer | |
| Víctor Martín | Spain | Swimming | 2016 Summer | |
| Walden Martin | United States | Road cycling | 1912 Summer | |
| Wilbur Martin | Skeleton | 1948 Winter | |
| Will Martin | Sailing | 1996 Summer | |
| William Martin | France | 1900 Summer | |
| William Martin | United States | Shooting | 1908 Summer | |
| William Martin | Great Britain | Water polo | 1936 Summer | |
| Churandy Martina | Netherlands Antilles, Netherlands | Athletics | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Gerry Martina | Ireland | Wrestling | 1956 Summer, 1960 Summer | |
| Fernand Martinaux | France | Swimming | 1948 Summer | |
| Simon Martin-Brisac | Field hockey | 2024 Summer | |
| Blanca Martín-Calero | Spain | Handball | 1992 Summer | |
| Leah Martindale | Barbados | Swimming | 1996 Summer, 2000 Summer | |
| Natalie Martindale | Saint Vincent and the Grenadines | Athletics | 1996 Summer | |
| Jean-Paul Martin du Gard | France | 1952 Summer, 1956 Summer | |
| John Martin-Dye | Great Britain | Swimming | 1960 Summer, 1964 Summer | |
| Barrett Martineau | Canada | Skeleton | 2018 Winter | |
| Eugène Martineau | Netherlands | Athletics | 2004 Summer, 2008 Summer | |
| Henry Martineau | Great Britain | Bobsleigh | 1928 Winter | |
| Herbert Martineau | Athletics | 1948 Summer | |
| Sydney Martineau | Fencing | 1908 Summer, 1912 Summer | |
| Pasiphaé Martineaud-Perret [ Wikidata ] | France | Water polo | 2024 Summer | |
| Tomas Martinec | Germany | Ice hockey | 2006 Winter | |
| Vladimír Martinec | Czechoslovakia | 1972 Winter, 1976 Winter, 1980 Winter | |
| János Martinek | Hungary | Modern pentathlon | 1988 Summer, 1996 Summer | |
| Karel Martínek [ Wikidata ] | Czechoslovakia | Art competitions | 1936 Summer | |
| Laura Martinel | Argentina | Judo | 1992 Summer | |
| Gabriel Martinelli | Brazil | Football | 2020 Summer | |
| Giuseppe Martinelli | Italy | Road cycling | 1976 Summer | |
| Liliana Martinelli | Argentina | Athletics | 1996 Summer | |
| Pietro Martinelli | Italy | Track cycling | 1920 Summer | |
| Silvio Martinello | 1984 Summer, 1996 Summer, 2000 Summer | |
| Carlo Martinenghi | Athletics | 1920 Summer, 1924 Summer | |
| Nicolò Martinenghi | Swimming | 2020 Summer, 2024 Summer | |
| Nicolae Martinescu | Romania | Wrestling | 1964 Summer, 1968 Summer, 1972 Summer, 1976 Summer | |
| Lucien Martinet | France | Rowing | 1900 Summer | |
| David Martinetti | Switzerland | Wrestling | 1992 Summer | |
| Étienne Martinetti | 1972 Summer | |
| Grégory Martinetti | 2000 Summer | |
| Jimmy Martinetti | 1968 Summer, 1972 Summer | |
| León Martinetti | Argentina | Basketball | 1948 Summer | |
| Laura Martínez | Spain | Judo | 2024 Summer | |
| Juan Martínez Brito | Cuba | Athletics | 1992 Summer | |
| Pedro Martínez Camí | Argentina | Handball | 2020 Summer, 2024 Summer | |
| Iker Martínez de Lizarduy | Spain | Sailing | 2004 Summer, 2008 Summer, 2012 Summer | |
| Jan Martínez Franchi | Argentina | Volleyball | 2024 Summer | |
| Guillermo Martínez Luis | Cuba | Water polo | 1992 Summer | |
| Juan Martínez Oliver | Spain | Track cycling | 1996 Summer | |
| Laura Martínez Ruiz | Artistic gymnastics | 2000 Summer | |
| María José Martínez Sánchez | Tennis | 2008 Summer, 2012 Summer | |
| Aitor Martínez | Swimming | 2016 Summer | |
| Alberto Martínez | Marathon swimming | 2020 Summer | |
| Aldo Martínez | Cuba | Wrestling | 1992 Summer | |
| Alex Martínez | El Salvador | Weightlifting | 1968 Summer | |
| Alex Martínez | Chile | Football | 1984 Summer | |
| Alexis Martínez | Mexico | Shooting | 2012 Summer | |
| Alfonso Martínez | Spain | Basketball | 1960 Summer, 1968 Summer | |
| Alfonso Martínez | Belize | Taekwondo | 2008 Summer | |
| Alma Martínez | Mexico | Football | 2004 Summer | |
| Alma Rosa Martínez | Athletics | 1968 Summer | |
| Andrés Martínez | Cuba | Weightlifting | 1968 Summer, 1972 Summer | |
| Ángela Martínez [ Wikidata ] | Spain | Marathon swimming | 2024 Summer | |
| Antonio Martínez | Philippines | Basketball | 1952 Summer | |
| Armando Martínez | Mexico | Road cycling | 1960 Summer | |
| Armando Martínez | Cuba | Boxing | 1980 Summer | |
| Arturo Martínez | Mexico | Judo | 2008 Summer | |
| Asier Martínez | Spain | Athletics | 2020 Summer, 2024 Summer | |
| Aymée Martínez | Cuba | 2012 Summer | |
| Brayelin Martínez | Dominican Republic | Volleyball | 2020 Summer, 2024 Summer | |
| Brenda Martinez | United States | Athletics | 2016 Summer | |
| Bruno Martínez [ Wikidata ] | Mexico | Archery | 2024 Summer | |
| Carlos Martínez | Cuba | Athletics | 1968 Summer | |
| Carlos Martínez | Mexico | Boxing | 1996 Summer | |
| Carlos Alberto Martínez | Argentina | Alpine skiing | 1976 Winter | |
| Carmen Martínez | Paraguay | Athletics | 2016 Summer | |
| Cayetano Martínez | Spain | Equestrian jumping | 1992 Summer | |
| Chema Martínez | Athletics | 2004 Summer, 2008 Summer | |
| Claus Martínez | Bolivia | Track cycling | 1996 Summer | |
| Conchita Martínez | Spain | Tennis | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer | |
| Cristina Martínez | Canoe slalom | 1992 Summer, 1996 Summer | |
| Daniel Martínez | Colombia | Road cycling | 2024 Summer | |
| David Martínez | Spain | Athletics | 1992 Summer, 1996 Summer, 2000 Summer | |
| Diego Martínez | Mexico | Football | 2004 Summer | |
| Dogomar Martínez | Uruguay | Boxing | 1948 Summer | |
| Douglas Martínez | Honduras | Football | 2020 Summer | |
| Edisbel Martínez | Cuba | Archery | 2000 Summer | |
| Elisabet Martínez | Spain | Rugby sevens | 2016 Summer | |
| Emil Martínez | Honduras | Football | 2008 Summer | |
| Emilio Martínez | Paraguay | 2004 Summer | |
| Enrique Martínez | Spain | Equestrian eventing, Equestrian jumping | 1960 Summer, 1964 Summer, 1972 Summer | |
| Enzo Martínez | Uruguay | Swimming | 2020 Summer | |
| Ernesto Martínez | Cuba | Volleyball | 1972 Summer, 1976 Summer, 1980 Summer | |
| Eduardo Martínez | Argentina | Volleyball, Beach volleyball | 1984 Summer, 1988 Summer, 1996 Summer, 2000 Summer | |
| Estíbaliz Martínez | Spain | Rhythmic gymnastics | 1996 Summer | |
| Eulalia Martínez | Mexico | Swimming | 1960 Summer | |
| Félix Martínez | Puerto Rico | Athletics | 2008 Summer | |
| Fernando Martínez | Argentina | Boxing | 2016 Summer | |
| Ferran Martínez | Spain | Basketball | 1988 Summer | |
| Florentino Martínez | Mexico | Wrestling | 1968 Summer, 1972 Summer | |
| Francisco Martínez | Basketball | 1936 Summer | |
| Francisco Martínez | Boxing | 1996 Summer | |
| Gerardo Martínez | Athletics | 2008 Summer | |
| Germán Martínez | Colombia | Swimming | 2000 Summer | |
| Gilberto Martínez | Mexico | Shooting | 1948 Summer | |
| Gilberto Martínez | Colombia | Swimming | 1956 Summer | |
| Guillermo Martínez | Shooting | 1972 Summer | |
| Guillermo Martínez | Argentina | Volleyball | 1996 Summer | |
| Guillermo Martínez | Cuba | Athletics | 2012 Summer | |
| Gustavo Martínez | Guatemala | Track cycling | 1952 Summer | |
| Gustavo Martínez | Spain | Sailing | 2000 Summer, 2004 Summer | |
| Henry Martínez | El Salvador | Boxing | 1988 Summer | |
| Heriberto Martínez | Cuba | Rowing | 1968 Summer | |
| Hermenegildo Martínez | Spain | Artistic gymnastics | 1960 Summer | |
| Hugo Martínez | Argentina | Boxing | 1964 Summer | |
| Imelda Martínez | Mexico | Marathon swimming | 2008 Summer | |
| Iñigo Martínez | Spain | Football | 2012 Summer | |
| Irene Martínez | Artistic gymnastics | 1980 Summer, 1984 Summer | |
| Isabel Martínez | Athletics | 1996 Summer | |
| Ismael Martínez | Puerto Rico | Boxing | 1976 Summer | |
| Ivis Martínez | El Salvador | Athletics | 2000 Summer | |
| Jairo Martínez | Honduras | Football | 2000 Summer | |
| James Martinez | United States | Wrestling | 1984 Summer | |
| Javi Martínez | Spain | Football | 2012 Summer | |
| Javier Martínez | Athletics | 1976 Summer | |
| Javier Martínez | Boxing | 1988 Summer | |
| Jesús Martínez | Mexico | 1996 Summer | |
| Jineiry Martínez | Dominican Republic | Volleyball | 2020 Summer, 2024 Summer | |
| Joan Lino Martínez | Spain | Athletics | 2004 Summer | |
| Jonder Martínez | Cuba | Baseball | 2004 Summer, 2008 Summer | |
| José Martínez | Spain | Rowing | 1924 Summer | |
| José Martínez | Mexico | Athletics | 1924 Summer | |
| José Martínez | Cuba | Swimming | 1968 Summer | |
| Jose Martinez | Canada | Boxing | 1972 Summer | |
| José Martínez | Colombia | Weightlifting | 1972 Summer | |
| José Martínez | Mexico | Canoe sprint | 1992 Summer | |
| José Martínez | Volleyball | 2016 Summer | |
| José Ángel Martínez | Swimming | 2020 Summer | |
| José Luis Martínez | Spain | Athletics | 1968 Summer | |
| José Luis Martínez | Shooting | 1968 Summer | |
| José Luis Martínez | Weightlifting | 1988 Summer, 1992 Summer | |
| José María Martínez | Canoe slalom | 1992 Summer | |
| Joseph Martinez | France | Artistic gymnastics | 1900 Summer | |
| Juan Martínez | Spain | Equestrian jumping | 1960 Summer | |
| Juan Martínez | Swimming | 1968 Summer | |
| Juan Martínez | Mexico | Canoe sprint | 1968 Summer, 1972 Summer, 1976 Summer | |
| Juan Antonio Martínez | Cuba | Fencing | 1948 Summer | |
| Juan Antonio Martínez | Spain | Basketball | 1968 Summer | |
| Juan Máximo Martínez | Mexico | Athletics | 1968 Summer, 1972 Summer | |
| Juan Ramón Martínez | El Salvador | Football | 1968 Summer | |
| Julio Martínez | Puerto Rico | Weightlifting | 1972 Summer, 1976 Summer | |
| Julio René Martínez | Guatemala | Athletics | 1996 Summer, 2000 Summer, 2004 Summer | |
| Kaina Martinez | Belize | 2012 Summer | |
| Lázaro Martínez | Cuba | 1992 Summer | |
| Lázaro Martínez | 2016 Summer, 2024 Summer | |
| Leila Martínez | Beach volleyball | 2020 Summer | |
| Lem Martínez | Uruguay | Modern pentathlon | 1952 Summer | |
| Leonel Martínez | Venezuela | Shooting | 1984 Summer, 2024 Summer | |
| Leopoldo Martínez | Mexico | 1968 Summer | |
| Lisa Martínez | Puerto Rico | Softball | 1996 Summer | |
| Lois Maikel Martínez | Cuba, Spain | Athletics | 2004 Summer, 2016 Summer, 2020 Summer | |
| Lorenzo Martínez | Cuba | Volleyball | 1972 Summer, 1976 Summer | |
| Lucas Martínez | Argentina | Field hockey | 2020 Summer, 2024 Summer | |
| Lucía Martínez | Puerto Rico | Sailing | 1992 Summer, 1996 Summer | |
| Luis Martínez | Spain | Boxing | 1948 Summer | |
| Luis Martínez | Cuba | 1976 Summer | |
| Luis Martínez | Puerto Rico | Judo | 1988 Summer, 1992 Summer | |
| Luis Martínez | Guatemala | Athletics | 1996 Summer | |
| Luis Martínez | Spain | Sailing | 2000 Summer, 2004 Summer | |
| Luis Martínez | Shooting | 2008 Summer | |
| Luis Bernardo Martínez | Wrestling | 1992 Summer | |
| Luis Martínez | Guatemala | Swimming | 2016 Summer, 2020 Summer | |
| Magdelín Martínez | Italy | Athletics | 2004 Summer, 2008 Summer | |
| Manuel Martínez | Spain | Fencing | 1960 Summer | |
| Manuel Martínez | Athletics | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer | |
| Marcelo Martínez [ Wikidata ] | Argentina | Alpine skiing | 1980 Winter | |
| María Martínez | Venezuela | Fencing | 2008 Summer, 2012 Summer | |
| María Isabel Martínez | Spain | Field hockey | 1992 Summer | |
| Mario Martinez | United States | Weightlifting | 1984 Summer, 1988 Summer, 1992 Summer | |
| Mario Martínez | Honduras | Football | 2012 Summer | |
| Mauricio Martínez | Argentina | 2016 Summer | |
| Mayte Martínez | Spain | Athletics | 2000 Summer, 2004 Summer | |
| Mayvelis Martínez | Cuba | Volleyball | 2004 Summer | |
| Michael Christian Martinez | Philippines | Figure skating | 2014 Winter, 2018 Winter | |
| Miguel Martinez | France | Cycling mountain bike | 1996 Summer, 2000 Summer, 2004 Summer | |
| Miguel Martínez | Cuba | Wrestling | 2016 Summer | |
| Mireia Martínez | Spain | Rhythmic gymnastics | 2024 Summer | |
| Modesto Martínez | Mexico | Water polo | 1952 Summer | |
| Nemesio Martínez | Spain | Equestrian jumping | 1924 Summer | |
| Nick Martinez | United States | Baseball | 2020 Summer | |
| Nuria Martínez | Spain | Basketball | 2004 Summer, 2008 Summer | |
| Orlando Martínez | Cuba | Boxing | 1968 Summer, 1972 Summer, 1976 Summer | |
| Oscar Martínez | Argentina | Fencing | 1928 Summer | |
| Osvaldo Martínez [ Wikidata ] | Chile | Water polo | 1948 Summer | |
| Pablo Martínez | Spain | Canoe sprint | 2020 Summer | |
| Paulina Martínez [ Wikidata ] | Mexico | Judo | 2024 Summer | |
| Paulino Martínez | Spain | Road cycling | 1976 Summer | |
| Pedro Martínez | Tennis | 2024 Summer | |
| Primitivo Martínez | Philippines | Basketball | 1936 Summer, 1948 Summer | |
| Rafael Martínez | Spain | Artistic gymnastics | 2004 Summer, 2008 Summer | |
| Ramiro Martínez | Argentina | Handball | 2020 Summer | |
| Ramón Martínez | Spain | Fencing | 1960 Summer | |
| Raquel Martínez | Chile | Athletics | 1936 Summer | |
| Raúl Martínez | Argentina | Fencing | 1960 Summer | |
| Raúl Martínez | Cuba | Wrestling | 1992 Summer | |
| Raúl Martínez | Spain | Taekwondo | 2020 Summer | |
| Ricardo Martínez | El Salvador | Football | 1968 Summer | |
| Roberto Martínez | Uruguay | Boxing | 1960 Summer | |
| Roberto Martínez | Honduras | 1988 Summer | |
| Rogelio Martínez | Dominican Republic | 1996 Summer | |
| Rosario Martínez | El Salvador | Athletics | 1968 Summer | |
| Rubert Martínez | Cuba | Judo | 2004 Summer | |
| Santiago Martínez | Spain | Equestrian eventing | 1948 Summer | |
| Santiago Martínez | Weightlifting | 2004 Summer | |
| Sergio Martínez | Colombia | Swimming | 1956 Summer | |
| Sergio Martínez | Cuba | Road cycling, Track cycling | 1968 Summer | |
| Silvia Martínez | Spain | Artistic gymnastics | 1992 Summer | |
| Vicente Martínez | Mexico | Wrestling | 1972 Summer | |
| Walter Martínez | Nicaragua | Shooting | 1996 Summer, 2000 Summer, 2008 Summer | |
| Wilfredo Martínez | Cuba | Athletics | 2008 Summer | |
| Yamilé Martínez | Basketball | 1992 Summer, 1996 Summer, 2000 Summer | |
| Yancarlos Martínez | Dominican Republic | Athletics | 2016 Summer, 2020 Summer | |
| Yarianna Martínez | Cuba | 2008 Summer | |
| Yoana Martínez | Spain | Badminton | 2008 Summer | |
| Yosbel Martínez | Cuba | Rowing | 2000 Summer, 2004 Summer | |
| Yuberjen Martínez | Colombia | Boxing | 2016 Summer, 2020 Summer | |
| Isidoro Martínez-Vela | Spain | Swimming | 1948 Summer | |
| José Martínez-Zorilla | Mexico | Fencing | 1936 Summer | |
| Martini [ Wikidata ] | France | 1900 Summer | |
| Bruno Martini | Handball | 1996 Summer, 2000 Summer | |
| Cathleen Martini | Germany | Bobsleigh | 2010 Winter, 2014 Winter | |
| Flavio Martini | Italy | Road cycling | 1968 Summer | |
| Juan Ángel Martini Sr. | Argentina | Shooting | 1960 Summer, 1964 Summer | |
| Juan Ángel Martini Jr. | 1968 Summer | |
| Moreno Martini | Italy | Athletics | 1960 Summer | |
| Olivier Martini | Monaco | Fencing | 1984 Summer, 1988 Summer | |
| Paul Martini | Canada | Figure skating | 1980 Winter, 1984 Winter | |
| Renato Martini | Italy | Athletics | 1972 Summer | |
| Ferdinanda Martini-Pautasso | Switzerland | Diving | 1952 Summer | |
| Reidar Martiniuson | Norway | Sailing | 1920 Summer | |
| Trond Martiniussen | Wrestling | 1972 Summer | |
| Ruth Martin-Jones | Great Britain | Athletics | 1972 Summer | |
| Eliška Martínková [ Wikidata ] | Czech Republic | 2024 Summer | |
| Juan Martín-Merbilháa | Argentina | Equestrian eventing | 1956 Summer | |
| Angel Martino | United States | Swimming | 1992 Summer, 1996 Summer | |
| Francesco Martino | Italy | Artistic gymnastics | 1924 Summer | |
| Juan Martino | Argentina | Shooting | 1924 Summer | |
| Leopoldo Di Martino | Italy | Sailing | 1976 Summer | |
| Marco Martino | Athletics | 1984 Summer | |
| Matteo Martino | Volleyball | 2008 Summer | |
| Marie Martinod | France | Freestyle skiing | 2014 Winter, 2018 Winter | |
| Stefano Martinoli | Italy | Rowing | 1956 Summer | |
| Pascal Martinot-Lagarde | France | Athletics | 2016 Summer, 2020 Summer | |
| Martin Martinov | Bulgaria | Road cycling | 1976 Summer | |
| Oliver Martinov | Croatia | Rowing | 2000 Summer | |
| Branislav Martinović | Yugoslavia | Wrestling | 1960 Summer, 1964 Summer | |
| Ivan Martinović | Croatia | Handball | 2024 Summer | |
| Glafira Martinovich | Belarus | Rhythmic gymnastics | 2004 Summer, 2008 Summer | |
| Gabriela Martinovová | Czech Republic | Alpine skiing | 2002 Winter | |
| Lucía Martín-Portugués [ Wikidata ] | Spain | Fencing | 2024 Summer | |
| Antonio Martins Bordelo | France | Athletics | 1992 Summer | |
| Afonso Martins | Portugal | Football | 1996 Summer | |
| Ana Martins | Angola | Swimming | 1988 Summer | |
| Ana Filipa Martins | Portugal | Artistic gymnastics | 2016 Summer, 2020 Summer, 2024 Summer | |
| André Martins | Football | 2016 Summer | |
| Andrezza Martins | Georgia | Beach volleyball | 2008 Summer | |
| António Martins | Portugal | Shooting, Athletics | 1920 Summer, 1924 Summer | |
| António Martins | Shooting | 1960 Summer | |
| Armando Martins | Football | 1928 Summer | |
| Carlos Martins | 2004 Summer | |
| Edgar Martins | Mozambique | Swimming | 1980 Summer | |
| Edson Martins | Brazil | Bobsleigh | 2014 Winter, 2018 Winter, 2022 Winter | |
| Edward Martins | Liberia | Athletics | 1956 Summer | |
| Eliane Martins | Brazil | 2016 Summer, 2020 Summer, 2024 Summer | |
| Fernanda Martins | 2016 Summer, 2020 Summer | |
| Fernando Martins | Boxing | 1976 Summer | |
| Graciela Martins | Guinea-Bissau | Athletics | 2012 Summer | |
| Henrique Martins | Brazil | Swimming | 2016 Summer | |
| Jennifer Martins | Canada | Rowing | 2016 Summer, 2020 Summer | |
| John Martins | Nigeria | Boxing | 1980 Summer | |
| José Martins | Brazil | 1960 Summer | |
| José Martins | Portugal | Football | 1928 Summer | |
| Lorraine Martins | Brazil | Athletics | 2024 Summer | |
| Luiz Martins | Shooting | 1960 Summer | |
| Marco Martins | Fencing | 2000 Summer | |
| Maria Martins | France | Athletics | 2004 Summer | |
| Maria Martins | Portugal | Track cycling | 2020 Summer, 2024 Summer | |
| Mariana Martins | Brazil | Judo | 2000 Summer | |
| Miguel Martins | Portugal | Handball | 2020 Summer | |
| Nelia Martins | Timor-Leste | Athletics | 2016 Summer | |
| Paulo Martins | Portugal | Wrestling | 1992 Summer | |
| Pedro Martins | Athletics | 2000 Summer, 2004 Summer | |
| Pedro Martins | Badminton | 2012 Summer, 2016 Summer | |
| Ramiro Martins | Road cycling | 1960 Summer | |
| Tobías Martins | Argentina | Field hockey | 2024 Summer | |
| Valdiléia Martins | Brazil | Athletics | 2024 Summer | |
| Charles Martin-Sauvaigo | France | Art competitions | 1928 Summer | |
| Alf Martinsen | Norway | Football | 1936 Summer | |
| Ivar Martinsen | Speed skating | 1948 Winter, 1952 Winter | |
| Nicholas Fadler Martinsen | Sailing | 2020 Summer | |
| Odd Martinsen | Cross country skiing | 1968 Winter, 1976 Winter | |
| Petter Martinsen | Artistic gymnastics | 1912 Summer | |
| Ragnvald Martinsen | Road cycling | 1928 Summer | |
| Sven Martinsen | Wrestling | 1924 Summer, 1928 Summer | |
| Thor Martinsen | Ice hockey | 1964 Winter, 1968 Winter, 1972 Winter, 1980 Winter | |
| Mirdza Martinsone | Latvia | Alpine skiing | 1936 Winter | |
| Barbro Martinsson | Sweden | Cross country skiing | 1956 Winter, 1960 Winter, 1964 Winter, 1968 Winter | |
| Emil Martinsson | Shooting | 2004 Summer | |
| Mikael Martinsson | Ski jumping | 1992 Winter, 1994 Winter | |
| Olle Martinsson | 1964 Winter | |
| Sven Martinsson | Bobsleigh | 1968 Winter | |
| Sebastien Martiny [ Wikidata ] | France | Trampolining | 2016 Summer | |
| Yoyong Martirez | Philippines | Basketball | 1972 Summer | |
| Sargis Martirosjan | Austria | Weightlifting | 2016 Summer, 2020 Summer | |
| Armen Martirosyan | Armenia | Athletics | 1996 Summer, 2000 Summer, 2004 Summer | |
| Simon Martirosyan | Weightlifting | 2016 Summer, 2020 Summer | |
| Tigran Gevorg Martirosyan | 2008 Summer | |
| Tigran Vardan Martirosyan | 2004 Summer, 2008 Summer | |
| Vanes Martirosyan | United States | Boxing | 2004 Summer | |
| Edsel Martis | Netherlands | Baseball | 1996 Summer | |
| Shairon Martis | 2008 Summer | |
| Yuliya Martisova | Russia | Road cycling | 2008 Summer | |
| Karl Martitsch | Austria | Cross country skiing, Nordic combined | 1948 Winter | |
| Anita Márton | Hungary | Athletics | 2012 Summer, 2016 Summer, 2020 Summer | |
| Anna Márton | Fencing | 2016 Summer, 2020 Summer, 2024 Summer | |
| Carmen Marton | Australia | Taekwondo | 2008 Summer, 2012 Summer, 2016 Summer | |
| Caroline Marton | 2016 Summer | |
| Gréta Márton | Hungary | Handball | 2020 Summer, 2024 Summer | |
| Ion Marton | Romania | Wrestling | 1972 Summer | |
| István Marton | Hungary | Fencing | 1972 Summer | |
| Jack Marton | Australia | Taekwondo | 2020 Summer | |
| József Marton | Hungary | Athletics | 1928 Summer | |
| László Márton | Rowing | 1952 Summer | |
| Michael Marton | Israel | Shooting | 1968 Summer | |
| Richárd Márton | Hungary | Swimming | 2020 Summer, 2024 Summer | |
| Viviana Márton | Taekwondo | 2024 Summer | |
| Alexander Martonffy | Australia | Fencing | 1956 Summer, 1964 Summer | |
| Miguel Martorell | Spain | Track cycling | 1960 Summer | |
| György Martos | Hungary | Speed skating | 1968 Winter | |
| Juan Martos | Spain | Basketball | 1960 Summer | |
| Mihály Martos | Hungary | Speed skating | 1964 Winter, 1968 Winter | |
| Sebastián Martos | Spain | Athletics | 2016 Summer, 2020 Summer | |
| Vitaliy Martsiv | Ukraine | Cross country skiing | 2006 Winter | |
| Martti Marttelin | Finland | Athletics | 1928 Summer | |
| Perry Martter | United States | Wrestling | 1924 Summer | |
| Erkki Marttinen | Finland | Swimming | 1952 Summer | |
| Esko Marttinen | Biathlon | 1964 Winter | |
| Egilberto Martufi | Italy | Athletics | 1952 Summer | |
| Charles Marty [ Wikidata ] | France | Fencing | 1900 Summer | |
| Jacques Marty | Boxing | 1964 Summer | |
| Jeanette Marty | Switzerland | Ice hockey | 2006 Winter | |
| Julia Marty | 2006 Winter, 2010 Winter, 2014 Winter | |
| Louis-Charles Marty | France | Artistic gymnastics | 1912 Summer, 1920 Summer | |
| Niki Marty | Switzerland | Shooting | 2004 Summer | |
| Stefanie Marty | Ice hockey | 2006 Winter, 2010 Winter, 2014 Winter | |
| Marta Martyanova | Russian Olympic Committee | Fencing | 2020 Summer | |
| Wiesława Martyka | Poland | Luge | 1972 Winter | |
| Henryk Martyna | Football | 1936 Summer | |
| Ihor Martynenko | Ukraine | Rowing | 1996 Summer | |
| Oleksandr Martyniuk [ Wikidata ] | Football | 2024 Summer | |
| Sergei Martynov | Soviet Union, Belarus | Shooting | 1988 Summer, 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Sergey Martynov | Kazakhstan | Archery | 1996 Summer | |
| Sergey Martynov | Unified Team, Russia | Wrestling | 1992 Summer, 1996 Summer | |
| Maria Martynova | Belarus | Shooting | 2020 Summer | |
| Natalya Martynova | Unified Team, Russia | Cross country skiing | 1992 Winter, 1994 Winter | |
| Yana Martynova | Russia | Swimming | 2004 Summer, 2008 Summer, 2012 Summer | |
| Kirill Martynychev | Russian Olympic Committee | 2020 Summer | |
| Valery Martyshev | Russia | Equestrian eventing | 2008 Summer | |
| Aleksandr Martyshkin | Soviet Union | Rowing | 1968 Summer, 1972 Summer | |
| Lev Martyushev | Russia | Fencing | 1912 Summer | |
| Judy Martz | United States | Speed skating | 1964 Winter | |
| Jean-Baptiste Martzluff | France | Volleyball | 1988 Summer | |
| Giustiniano Marucco | Italy | Football | 1920 Summer | |
| Stanisław Marucha | Poland | Shooting | 1964 Summer, 1976 Summer | |
| Lorenzo Marugo | Italy | Swimming | 1972 Summer | |
| Víctor Marulanda | Colombia | Football | 1992 Summer | |
| Fyodor Marulin | Soviet Union | Athletics | 1952 Summer | |
| Kei Marumo | Japan | Artistic swimming | 2016 Summer | |
| Regina Marunde | Germany | Cycling mountain bike | 1996 Summer | |
| Satoshi Maruo | Japan | Athletics | 2020 Summer | |
| Takamasa Maruo | Rugby sevens | 2024 Summer | |
| Ben Maruquin | United States | Field hockey | 1996 Summer | |
| Andrzej Marusarz | Poland | Nordic combined, Ski jumping | 1932 Winter, 1936 Winter | |
| Józef Marusarz | Alpine skiing | 1948 Winter, 1952 Winter, 1956 Winter | |
| Stanisław Marusarz | Cross country skiing, Nordic combined, Ski jumping | 1932 Winter, 1936 Winter, 1948 Winter, 1952 Winter | |
| Wojciech Marusarz | Nordic combined | 2018 Winter | |
| Hanna Marusava | Belarus | Archery | 2000 Summer, 2004 Summer, 2020 Summer | |
| Dmitry Marushchak | Russia | Freestyle skiing | 2010 Winter | |
| Semyon Marushkin | Soviet Union | Wrestling | 1952 Summer | |
| Yevhen Marusiak | Ukraine | Ski jumping | 2022 Winter | |
| Fedja Marušič | Slovenia | Canoe slalom | 1996 Summer, 2000 Summer | |
| Sead Marušić | Yugoslavia, Croatia | Rowing | 1988 Summer, 1992 Summer, 1996 Summer | |
| Lenka Marušková | Czech Republic | Shooting | 2004 Summer, 2008 Summer, 2012 Summer | |
| Adkar Maruti | India | Wrestling | 1972 Summer | |
| Arajik Marutjan | Germany | Boxing | 2016 Summer | |
| Abdul Majeed Maruwala | Pakistan | Wrestling | 1984 Summer, 1988 Summer | |
| Satoshi Maruya | Japan | Swimming | 1968 Summer | |
| Hitonari Maruyama | Alpine skiing | 1968 Winter | |
| Juichi Maruyama | 1968 Winter | |
| Karina Maruyama | Football | 2004 Summer, 2008 Summer, 2012 Summer | |
| Kenji Maruyama | Judo | 1992 Summer | |
| Paul Maruyama | United States | 1964 Summer | |
| Sayuri Maruyama | Japan | Canoe sprint | 1996 Summer, 2000 Summer | |
| Shigemori Maruyama | Swimming | 1988 Summer | |
| Shiro Maruyama | Fencing | 1972 Summer | |
| Tadayuki Maruyama | Boxing | 1964 Summer | |
| Takashi Maruyama | Volleyball | 1976 Summer | |
| Tomokazu Maruyama | Shooting | 1956 Summer | |
| Toshiaki Maruyama | Nordic combined | 1984 Winter | |
| Yumi Maruyama | Volleyball | 1984 Summer, 1988 Summer | |
| Rocky Marval | United States | Figure skating | 1992 Winter | |
| Györgyi Marvalics-Székely | Hungary | Fencing | 1960 Summer | |
| Kálmán Marvalits | Athletics | 1924 Summer, 1928 Summer | |
| Haralds Marvē | Latvia | Shooting | 1936 Summer | |
| Gigi Marvin | United States | Ice hockey | 2010 Winter, 2014 Winter, 2018 Winter | |
| John Marvin | Sailing | 1956 Summer | |
| Franco Marvulli | Switzerland | Track cycling | 2000 Summer, 2004 Summer, 2008 Summer | |
| Dickson Marwa Mkami | Tanzania | Athletics | 2008 Summer | |
| Amarjeet Singh Marwa | Kenya | Field hockey | 1972 Summer | |
| Harvinder Singh Marwa | 1968 Summer, 1972 Summer | |
| Joseph Marwa | Tanzania | Boxing | 1988 Summer, 1992 Summer | |
| Ali Marwi | Kuwait | Football | 1992 Summer | |
| Kareen Marwick | Great Britain | Rowing | 1992 Summer | |
| Alena Marx | Switzerland | Canoe slalom | 2020 Summer, 2024 Summer | |
| Claudia Marx | Germany | Athletics | 2004 Summer | |
| Erich Marx | Cross country skiing | 1936 Winter | |
| Franz Marx | Austria | Wrestling | 1984 Summer, 1992 Summer | |
| Ingeborg Marx | Belgium | Weightlifting | 2000 Summer | |
| Joachim Marx | Poland | Football | 1972 Summer | |
| Leslie Marx | United States | Fencing | 1996 Summer | |
| Michael Marx | West Germany | Track cycling | 1984 Summer | |
| Michael Marx | United States | Fencing | 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer | |
| Robert Marx | 1984 Summer, 1988 Summer, 1992 Summer | |
| Walter Marx | Slovakia | Luge | 2002 Winter, 2006 Winter | |
| Günther Marxer | Liechtenstein | Alpine skiing | 1984 Winter, 1988 Winter, 1992 Winter | |
| Herbert Marxer | 1972 Winter | |
| Manuela Marxer | Athletics | 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer | |
| Solenne Mary [ Wikidata ] | France | Fencing | 2008 Summer | |
| Walerian Maryański | Poland | Shooting | 1924 Summer | |
| Fridrikh Maryutin | Soviet Union | Football | 1952 Summer | |
| Kurt Marz | Austria | Rowing | 1952 Summer | |
| Vasilisa Marzaliuk | Belarus | Wrestling | 2012 Summer, 2016 Summer, 2020 Summer | |
| Jesús Marzán | Philippines | Basketball | 1936 Summer | |
| Ryszard Marzec | Poland | Field hockey | 1952 Summer, 1960 Summer | |
| Gustavo Marzi | Italy | Fencing | 1928 Summer, 1932 Summer, 1936 Summer | |
| Gioia Marzocca | 2004 Summer, 2008 Summer, 2012 Summer | |
| Frank Marzoch | Germany | Archery | 1992 Summer | |
| Michaela Marzola | Italy | Alpine skiing | 1988 Winter | |
| Gianfranco Marzolla | Artistic gymnastics | 1960 Summer | |
| Pierluigi Marzorati | Basketball | 1972 Summer, 1976 Summer, 1980 Summer, 1984 Summer | |
| Abdul Aziz Al-Marzoug | Saudi Arabia | Football | 1996 Summer | |
| Faisal Marzouk | Kuwait | Swimming | 1984 Summer | |
| Faraj Saad Marzouk | Qatar | Athletics | 1984 Summer, 1988 Summer | |
| Ghazi Saleh Marzouk | Saudi Arabia | 1972 Summer, 1976 Summer | |
| Habiba Marzouk | Egypt | Rhythmic gymnastics | 2020 Summer | |
| Rashid Sheban Marzouk | Qatar | Athletics | 1988 Summer | |
| Saleh Marzouk [ Wikidata ] | Kuwait | Swimming | 1980 Summer | |
| Mehdi Marzouki | France | Water polo | 2016 Summer, 2024 Summer | |
| Fahad Marzouq | Kuwait | Football | 1992 Summer | |
| Salah Al-Marzouq | Handball | 1996 Summer | |
| Aprilia Marzuki | Indonesia | Judo | 2000 Summer | |