| Name | Nation | Sport | Games | Notes |
|---|
| Si Rijigawa | China | Judo | 2008 Summer | |
| Si Tianfeng | Athletics | 2008 Summer, 2012 Summer | |
| Si Yajie | Diving | 2016 Summer | |
| Sia Wai Yen | Malaysia | Swimming | 2000 Summer | |
| Ferenc Siák | Hungary | Diving | 1956 Summer | |
| Sione Sialaoa | Samoa | Weightlifting | 1984 Summer | |
| Androula Sialou | Cyprus | Athletics | 2004 Summer | |
| Sydney Siame | Zambia | 2020 Summer | |
| Esther Siamfuko | Football | 2020 Summer, 2024 Summer | |
| Kanstantsin Siamionau | Belarus | Judo | 2008 Summer | |
| Mikhail Siamionau | Wrestling | 2008 Summer | |
| Godfrey Siamusiye | Zambia | Athletics | 1992 Summer, 1996 Summer | |
| Thomas Siani [ Wikidata ] | Cameroon | Road cycling | 1984 Summer | |
| Jerzy Siankiewicz | Poland | Field hockey | 1952 Summer | |
| Adam Siao Him Fa | France | Figure skating | 2022 Winter | |
| Maksim Siarheyeu | Belarus | Short track speed skating | 2014 Winter, 2018 Winter | |
| Sviatlana Siarova | Athletics | 2012 Summer | |
| Samson Siasia | Nigeria | Football | 1988 Summer | |
| Einaras Šiaudvytis | Lithuania | Rowing | 2004 Summer | |
| Jakab Sibalin | Hungary | Handball | 1988 Summer, 1992 Summer | |
| Karabo Sibanda | Botswana | Athletics | 2016 Summer | |
| Daniel Sibandze | Eswatini | 1996 Summer | |
| Stefano Sibani | Italy | Volleyball | 1976 Summer, 1980 Summer | |
| Magnus Sibbersen [ Wikidata ] | Denmark | Canoe sprint | 2024 Summer | |
| John Sibbit | Great Britain | Track cycling | 1928 Summer, 1936 Summer | |
| Cornelis Sibe | Suriname | Athletics | 2004 Summer | |
| Francesco Sibello | Italy | Sailing | 1972 Summer | |
| Gianfranco Sibello | 2004 Summer, 2008 Summer, 2012 Summer | |
| Pietro Sibello | 2004 Summer, 2008 Summer | |
| James Sibenge | Zimbabwe | Judo | 1988 Summer | |
| Arab Sibghatullah | Refugee Olympic Team | 2024 Summer | |
| Harvinder Pal Singh Sibia | Kenya | Field hockey | 1972 Summer | |
| Nikola Sibiak | Poland | Track cycling | 2024 Summer | |
| Antoine Sibierski | France | Football | 1996 Summer | |
| Tatyana Sibileva | Russia | Athletics | 2008 Summer | |
| Alessandro Sibilio | Italy | 2020 Summer, 2024 Summer | |
| Cándido Sibilio | Spain | Basketball | 1980 Summer | |
| Guy Sibille | France | Road cycling | 1972 Summer | |
| Petar Sibinkić | Serbia and Montenegro, Bulgaria | Canoe sprint | 1996 Summer, 2000 Summer | |
| Iliá Sibírtsev [ Wikidata ] | Uzbekistan | Swimming | 2024 Summer | |
| Eduard Sibiryakov | Soviet Union | Volleyball | 1964 Summer, 1968 Summer | |
| Kelly Sibley | Great Britain | Table tennis | 2012 Summer | |
| Gerald Sibon | Netherlands | Football | 2008 Summer | |
| Gilles Sibon | France | Athletics | 1968 Summer | |
| Brahim Ait Sibrahim | Morocco | Alpine skiing | 1984 Winter, 1992 Winter | |
| Horacio Siburu | Argentina | Modern pentathlon | 1948 Summer | |
| Petra Sičaková | Czech Republic | Athletics | 2024 Summer | |
| André Sicard | France | 1936 Summer | |
| Federico Sicard | Colombia | Swimming | 1968 Summer | |
| Vincenza Sicari | Italy | Athletics | 2008 Summer | |
| Yann Siccardi | Monaco | Judo | 2008 Summer, 2012 Summer, 2016 Summer | |
| Henry Sichalwe | Zambia | 1980 Summer | |
| Jhon Sichel | Ecuador | Weightlifting | 1988 Summer | |
| Michael Sichel | Australia | Fencing | 1956 Summer, 1960 Summer | |
| Lidiia Sichenikova | Ukraine | Archery | 2012 Summer, 2016 Summer, 2020 Summer | |
| Kazimierz Sichulski | Poland | Art competitions | 1928 Summer | |
| Klaudia Siciarz | Athletics | 2020 Summer | |
| Horacio Sicilia | Argentina | Rowing | 1996 Summer | |
| Piermaria Siciliano | Italy | Swimming | 1992 Summer, 1996 Summer | |
| Olga Šicnerová | Czechoslovakia | Athletics | 1948 Summer | |
| Dylan Sicobo | Seychelles | 2024 Summer | |
| Alexandra Sicoe | Romania | 1952 Summer | |
| Julien Sicot | France | Swimming | 2004 Summer | |
| Danièle Sicot-Coulon | Artistic gymnastics | 1956 Summer, 1960 Summer | |
| Silvia Sicouri | Italy | Sailing | 2016 Summer | |
| Andris Šics | Latvia | Luge | 2006 Winter, 2010 Winter, 2014 Winter, 2018 Winter, 2022 Winter | |
| Juris Šics | 2006 Winter, 2010 Winter, 2014 Winter, 2018 Winter, 2022 Winter | |
| Bachir Sid Azara | Algeria | Wrestling | 2020 Summer, 2024 Summer | |
| Zaurbek Sidakov | Russian Olympic Committee | 2020 Summer | |
| Abdallah Sidani | Lebanon | 1948 Summer | |
| Sidão | Brazil | Volleyball | 2012 Summer | |
| Antonio Siddi | Italy | Athletics | 1948 Summer, 1952 Summer | |
| Diya Siddique | Bangladesh | Archery | 2020 Summer | |
| Islahuddin | Pakistan | Field hockey | 1972 Summer, 1976 Summer | |
| Muhammad Siddique | Athletics | 1972 Summer, 1976 Summer | |
| Sadaf Siddiqui | 2008 Summer | |
| Ghulam Sideer | Afghanistan | Wrestling | 1972 Summer | |
| Jalani Sidek | Malaysia | Badminton | 1992 Summer | |
| Rashid Sidek | 1992 Summer, 1996 Summer | |
| Razif Sidek | 1992 Summer | |
| Hareg Sidelil | Ethiopia | Athletics | 2000 Summer | |
| Alexander Sidelnikov | Soviet Union | Ice hockey | 1976 Winter | |
| Marilyn Sidelsky | Zimbabwe | Swimming | 1964 Summer | |
| Miriam Siderenski | Israel | Athletics | 1964 Summer | |
| Cornelia Sideri | Romania | Canoe sprint | 1964 Summer | |
| Ion Sideri | 1960 Summer | |
| Gerardus Siderius | Netherlands | 1936 Summer | |
| Avneet Sidhu | India | Shooting | 2008 Summer | |
| Balbir Singh Sidhu | Kenya | Field hockey | 1956 Summer | |
| Heena Sidhu | India | Shooting | 2012 Summer, 2016 Summer | |
| Vijayveer Sidhu | 2024 Summer | |
| Bouha Sidi | Mauritania | Athletics | 2024 Summer | |
| Péter Sidi | Hungary | Shooting | 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Babacar Sidibé | Senegal | Judo | 1972 Summer | |
| Odiah Sidibé | France | Athletics | 1992 Summer, 1996 Summer | |
| Rachid Sidibé | Burkina Faso | Judo | 2016 Summer | |
| Rafan Sidibé | Mali | Football | 2004 Summer | |
| Ioannis Sidiropoulos | Greece | Weightlifting | 1980 Summer, 1988 Summer | |
| Niki-Katerina Sidiropoulou | Fencing | 1996 Summer, 2004 Summer | |
| Arnas Šidiškis | Lithuania | Weightlifting | 2020 Summer | |
| Alyona Sidko | Russia | Cross country skiing | 2006 Winter | |
| Andrius Šidlauskas | Lithuania | Swimming | 2016 Summer, 2020 Summer, 2024 Summer | |
| Alfons Sidler | Switzerland | Athletics | 1972 Summer | |
| Elisa Sidler | Canoe sprint | 1952 Summer | |
| Janusz Sidło | Poland | Athletics | 1952 Summer, 1956 Summer, 1960 Summer, 1964 Summer, 1968 Summer | |
| Josef Šídlo | Czechoslovakia | Road cycling | 1928 Summer | |
| Elena Sidneva | Russia | Equestrian dressage | 2000 Summer, 2004 Summer | |
| Yelena Sidorchenkova Orlova | Athletics | 2012 Summer | |
| Aleksandr Sidorenko | Belarus | Wrestling | 1996 Summer | |
| Tatyana Sidorenko | Soviet Union | Volleyball | 1988 Summer | |
| Vasiliy Sidorenko | Russia | Athletics | 1996 Summer, 2000 Summer | |
| Genrikh Sidorenkov | Soviet Union | Ice hockey | 1956 Winter, 1960 Winter | |
| Vladimir Sidorkin | Estonia | Swimming | 2008 Summer | |
| Achim Sidorov | Romania | Canoe sprint | 1964 Summer | |
| Maksim Sidorov | Russia | Athletics | 2012 Summer | |
| Nikolay Sidorov | Soviet Union | 1980 Summer | |
| Oleg Sidorov | Uzbekistan | Swimming | 2004 Summer | |
| Pavel Sidorov | Kazakhstan | 2000 Summer | |
| Vitaliy Sidorov | Ukraine, Russia | Athletics | 1996 Summer, 2000 Summer | |
| Anna Sidorova | Russia | Curling | 2010 Winter, 2014 Winter | |
| Anzhelika Sidorova | Russian Olympic Committee | Athletics | 2020 Summer | |
| Galina Sidorova | Soviet Union | Alpine skiing | 1964 Winter, 1968 Winter | |
| Irina Sidorova | Diving | 1980 Summer | |
| Marina Sidorova | Athletics | 1972 Summer | |
| Mariya Sidorova | Russia | Handball | 2008 Summer, 2012 Summer | |
| Tatyana Sidorova | Soviet Union | Speed skating | 1964 Winter, 1968 Winter | |
| Valentina Sidorova | Fencing | 1976 Summer, 1980 Summer | |
| Yevgeniya Sidorova | Alpine skiing | 1956 Winter, 1960 Winter, 1964 Winter | |
| Victor Sidoruk | Archery | 1972 Summer | |
| Annarita Sidoti | Italy | Athletics | 1992 Summer, 1996 Summer, 2000 Summer | |
| Pando Sidov | Bulgaria | Artistic gymnastics | 1936 Summer | |
| Sidrac [ Wikidata ] | France | 1900 Summer | |
| Viktor Sidyak | Soviet Union | Fencing | 1968 Summer, 1972 Summer, 1976 Summer, 1980 Summer | |
| Liong Siang Sie | Netherlands | Rowing | 1920 Summer | |
| Frank Siebeck | East Germany | Athletics | 1972 Summer, 1976 Summer | |
| Mark Siebeck | Germany | Volleyball | 2008 Summer | |
| Paul Siebels | Belgium | Rowing | 1936 Summer | |
| Jon Sieben | Australia | Swimming | 1984 Summer, 1988 Summer, 1992 Summer | |
| Alex Siebenhaar | Switzerland | Rowing | 1952 Summer | |
| Heinrich Siebenhaar [ Wikidata ] | Germany | Artistic gymnastics | 1908 Summer | |
| Toni Siebenhaar | Rowing | 1952 Summer | |
| Ramona Siebenhofer | Austria | Alpine skiing | 2018 Winter, 2022 Winter | |
| Adalberto Siebens | Puerto Rico | Boxing | 1968 Summer | |
| Hermann von Siebenthal | Switzerland | Equestrian jumping | 1972 Summer | |
| Nathalie von Siebenthal | Cross country skiing | 2018 Winter | |
| Stefanie von Siebenthal | Snowboarding | 1998 Winter, 2002 Winter | |
| Walter von Siebenthal | Ice hockey | 1920 Summer, 1924 Winter | |
| Basil Sieber [ Wikidata ] | Skeleton | 2022 Winter | |
| Bernhard Sieber | Austria | Rowing | 2016 Summer | |
| Christoph Sieber | Sailing | 1992 Summer, 2000 Summer | |
| Pascal Sieber | Switzerland | Curling | 2006 Winter | |
| Paul Sieber | Austria | Rowing | 2016 Summer | |
| Wolfgang Sieber | Germany | Swimming | 1960 Summer | |
| Marcel Sieberg | Road cycling | 2012 Summer | |
| Erich Siebert | Switzerland | Boxing | 1924 Summer | |
| Erich Siebert | Germany | Wrestling | 1936 Summer | |
| Gloria Siebert | East Germany | Athletics | 1988 Summer | |
| Jerry Siebert | United States | 1960 Summer, 1964 Summer | |
| Jörg Siebert | West Germany | Rowing | 1968 Summer | |
| Klaus Siebert | East Germany | Biathlon | 1980 Winter | |
| Ludwig Siebert | Germany | Bobsleigh | 1964 Winter | |
| Keren Siebner | Israel | Swimming | 2016 Summer | |
| Carlos Sieburger | Argentina | Sailing | 1960 Summer | |
| Enrique Sieburger Jr. | 1948 Summer, 1960 Summer | |
| Enrique Sieburger Sr. | 1948 Summer, 1952 Summer | |
| Julio Sieburger | 1936 Summer, 1948 Summer | |
| Roberto Sieburger | 1948 Summer, 1952 Summer, 1960 Summer, 1964 Summer, 1968 Summer | |
| Birte Siech | East Germany, Germany | Rowing | 1988 Summer, 1992 Summer | |
| Roman Gąsienica Sieczka | Poland | Ski jumping | 1956 Winter | |
| Stanisław Gąsienica Sieczka | 1928 Winter | |
| Zygmunt Siedlecki | Athletics | 1932 Summer | |
| Harry Siefert | Denmark | 1936 Summer | |
| Silvia Siefert | East Germany | Handball | 1976 Summer | |
| Brandi Siegel | United States | Rhythmic gymnastics | 1996 Summer | |
| Jiří Siegel | Czechoslovakia | Basketball | 1948 Summer | |
| Olivier Siegelaar | Netherlands | Rowing | 2008 Summer, 2012 Summer, 2016 Summer | |
| Sarah Siegelaar | 2004 Summer, 2008 Summer | |
| Johann Siegele | Austria | Athletics | 1980 Summer | |
| Wilfried Siegele | 1980 Summer | |
| Björn Siegemund | Germany | Badminton | 2000 Summer, 2004 Summer | |
| Laura Siegemund | Tennis | 2016 Summer, 2020 Summer, 2024 Summer | |
| Bernard Siegenthaler | Switzerland | Shooting | 1920 Summer | |
| Fritz Siegenthaler | Track cycling | 1952 Summer | |
| Maja Siegenthaler | Sailing | 2016 Summer, 2020 Summer, 2024 Summer | |
| Pierre Siegenthaler | 1960 Summer | |
| Sina Siegenthaler | Snowboarding | 2022 Winter | |
| Josef Siegers | Germany | Athletics | 1936 Summer | |
| Walter Siegfried | Switzerland | Boxing | 1936 Summer | |
| Ingomar Sieghart | West Germany | Athletics | 1968 Summer, 1972 Summer | |
| Antonín Siegl | Czechoslovakia | Shooting | 1924 Summer | |
| Franz Siegl | Austria | Bobsleigh | 1984 Winter, 1988 Winter | |
| Harald Siegl | Equestrian eventing | 2004 Summer | |
| Lea Siegl | 2020 Summer | |
| Siegrun Siegl | East Germany | Athletics | 1976 Summer, 1980 Summer | |
| Edward Siegler | United States | Artistic gymnastics | 1904 Summer | |
| Hugo Siegmüller | Czechoslovakia | Art competitions | 1932 Summer, 1936 Summer | |
| Gerd Siegmund | Germany | Ski jumping | 1994 Winter | |
| Günter Siegmund | Boxing | 1960 Summer | |
| Edouard Siegrist | Switzerland | Field hockey | 1948 Summer | |
| Manuela Siegrist | Curling | 2018 Winter | |
| Sloan Siegrist | Guam | Athletics | 2004 Summer | |
| Lucyna Siejka | Poland | Field hockey | 1980 Summer | |
| Marian Siejkowski | Rowing | 1964 Summer, 1972 Summer | |
| Andrzej Sieledcow | Shooting | 1972 Summer | |
| Mariusz Siembida | Swimming | 1996 Summer, 2000 Summer | |
| Jan Siemerink | Netherlands | Tennis | 1992 Summer, 1996 Summer | |
| Ulf Siemes | Germany | Rowing | 2004 Summer | |
| Krzysztof Siemion | Poland | Weightlifting | 1988 Summer, 1992 Summer, 2000 Summer | |
| Łukasz Siemion | Rowing | 2012 Summer | |
| Romuald Siemionow | Shooting | 1976 Summer, 1980 Summer | |
| Piotr Siemionowski | Canoe sprint | 2012 Summer | |
| João Siemsen [ Wikidata ] | Brazil | Sailing | 2024 Summer | |
| Andriy Sienichkin | Ukraine | Artistic gymnastics | 2016 Summer | |
| Krzysztof Sieńko | Poland | Bobsleigh | 1998 Winter, 2002 Winter | |
| Félix Sienra | Uruguay | Sailing | 1948 Summer | |
| Juliusz Sieradzki | Poland | 1936 Summer | |
| Kamil Sieradzki | Swimming | 2020 Summer, 2024 Summer | |
| Dagmar Sierck | West Germany | 1972 Summer | |
| Roland Sierens | Belgium | Water polo | 1952 Summer | |
| Constanze Siering | Germany | Rowing | 2012 Summer | |
| Lauri Siering | United States | Swimming | 1976 Summer | |
| Klara Sierońska | Poland | Artistic gymnastics | 1936 Summer | |
| Vladislav Sierov | Ukraine | Ice hockey | 2002 Winter | |
| Arlenis Sierra | Cuba | Road cycling | 2016 Summer, 2020 Summer, 2024 Summer | |
| Carlos Sierra | Colombia | Athletics | 1956 Summer | |
| Fernando Sierra | Track cycling | 1992 Summer | |
| Jimmy Sierra | Athletics | 1968 Summer, 1972 Summer | |
| Leonardo Sierra | Venezuela | Road cycling | 1988 Summer | |
| Miguel Ángel Sierra | Spain | Wrestling | 1992 Summer | |
| Cezary Siess | Poland | Fencing | 1988 Summer, 1992 Summer | |
| Michał Siess [ Wikidata ] | 2024 Summer | |
| Erwin Sietas | Germany | Swimming | 1928 Summer, 1932 Summer, 1936 Summer | |
| Sietes | Spain | Football | 1996 Summer | |
| Anete Sietiņa | Latvia | Athletics | 2020 Summer, 2024 Summer | |
| Kalle Sievänen | Finland | Shooting | 1956 Summer, 1960 Summer, 1964 Summer | |
| Challen Sievers | United States | Rhythmic gymnastics | 1996 Summer | |
| Karl-Heinz Sievers | West Germany | Athletics | 1968 Summer | |
| Ralf Sievers | Football | 1988 Summer | |
| Hans-Heinrich Sievert | Germany | Athletics | 1932 Summer, 1936 Summer | |
| Jacqueline Sievert | Switzerland | Artistic gymnastics | 1972 Summer | |
| Paul Sievert | Germany | Athletics | 1932 Summer | |
| Jani Sievinen | Finland | Swimming | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer | |
| Siew Shaw Her | Singapore | Sailing | 1988 Summer, 1992 Summer, 1996 Summer | |
| Wilson Siewari | Nigeria | Wrestling | 2008 Summer | |
| Patricia Siewert | West Germany | Swimming | 1972 Summer | |
| Abdul Rahman Sifeen | Saudi Arabia | Football | 1996 Summer | |
| Jaroslav Šifer | Yugoslavia | 1920 Summer | |
| Otto Siffling | Germany | 1936 Summer | |
| Geza Šifliš | Yugoslavia | 1928 Summer | |
| Nicole Sifuentes | Canada | Athletics | 2012 Summer, 2016 Summer | |
| Giorgos Sigalas | Greece | Basketball | 1996 Summer | |
| Victor de Sigaldi | Monaco | Sailing | 1952 Summer | |
| Neuso Sigauque | Mozambique | Judo | 2012 Summer | |
| Ronny Sigde | Norway | Wrestling | 1984 Summer, 1988 Summer | |
| Erwin von Sigel [ Wikidata ] | Germany | Athletics | 1912 Summer | |
| Thélia Sigère | France | 2008 Summer | |
| Margaretha Sigfridsson | Sweden | Curling | 2014 Winter | |
| Eugen Sigg | Switzerland | Rowing | 1924 Summer | |
| Eva Sigg | Finland | Swimming | 1968 Summer, 1972 Summer | |
| Arianna Sighel [ Wikidata ] | Italy | Short track speed skating | 2022 Winter | |
| Pietro Sighel | 2022 Winter | |
| Roberto Sighel | Speed skating | 1988 Winter, 1992 Winter, 1994 Winter, 1998 Winter, 2002 Winter | |
| Róbert Sighvatsson | Iceland | Handball | 2004 Summer | |
| Marcel Sigiran [ Wikidata ] | France | Wrestling | 1952 Summer | |
| Albert Sigl | Germany | Shooting | 1952 Summer, 1956 Summer | |
| Renate Sigl | Austria | Rowing | 1976 Summer | |
| Rudi Sigl | Germany | Shooting | 1956 Summer | |
| Wolfgang Sigl | Austria | Rowing | 1996 Summer, 2000 Summer, 2004 Summer | |
| Dick Sigmond | Netherlands | Football | 1924 Summer | |
| Rianne Sigmond | Rowing | 2012 Summer | |
| Freyr Gauti Sigmundsson | Iceland | Judo | 1992 Summer | |
| Ivar Sigmundsson | Alpine skiing | 1968 Winter | |
| Alain Sign | Great Britain | Sailing | 2016 Summer | |
| Mariama Signaté | France | Handball | 2008 Summer, 2012 Summer | |
| Walter Signer | Switzerland | Track cycling | 1960 Summer | |
| Jorge Signes | Spain | Water polo | 1984 Summer | |
| Andrè Signoretti | Italy | Ice hockey | 2006 Winter | |
| João Signorini | Brazil | Sailing | 2004 Summer | |
| José Sigot | Uruguay | Rowing | 1968 Summer | |
| Brita Sigourney | United States | Freestyle skiing | 2014 Winter, 2018 Winter, 2022 Winter | |
| Shannon Sigrist | Switzerland | Ice hockey | 2018 Winter, 2022 Winter | |
| Gina Sigstad | Norway | Cross country skiing | 1952 Winter, 1956 Winter | |
| Sigurbergur Sigsteinsson | Iceland | Handball | 1972 Summer | |
| Rúnar Sigtryggsson | 2004 Summer | |
| Hicham Sigueni | Morocco | Athletics | 2012 Summer, 2016 Summer | |
| Álex Sigurbjörnsson | Spain | Rowing | 2016 Summer | |
| Elín Sigurðardóttir | Iceland | Swimming | 1996 Summer, 2000 Summer | |
| Helga Sigurðardóttir | 1992 Summer | |
| Auburn Sigurdson | Canada | Softball | 2004 Summer | |
| Árni Sigurðsson | Iceland | Alpine skiing | 1964 Winter | |
| Árni Sigurðsson | Swimming | 1984 Summer | |
| Birgir Sigurðsson | Handball | 1992 Summer | |
| Bjarki Sigurðsson | 1988 Summer | |
| Dagur Sigurðsson | 2004 Summer | |
| Einar Sigurðsson | 1992 Summer | |
| Guðjón Valur Sigurðsson | 2004 Summer, 2008 Summer, 2012 Summer | |
| Guðmundur Sigurðsson | Weightlifting | 1972 Summer, 1976 Summer | |
| Haukur Sigurðsson | Cross country skiing | 1980 Winter | |
| Jakob Sigurðsson | Handball | 1984 Summer, 1988 Summer, 1992 Summer | |
| Jóel Sigurðsson | Athletics | 1948 Summer | |
| Jón Karl Sigurðsson | Alpine skiing | 1952 Winter | |
| Oddur Sigurðsson | Athletics | 1980 Summer, 1984 Summer | |
| Pétur Sigurðsson | 1952 Summer | |
| Sigfús Sigurðsson | 1948 Summer | |
| Sigfús Sigurðsson | Handball | 2004 Summer, 2008 Summer | |
| John Siguria | Papua New Guinea | Athletics | 1988 Summer | |
| Haukur Sigurðsson | Alpine skiing | 1952 Winter | |
| Reynir Sigurðsson | Athletics | 1948 Summer | |
| Sigurður Sigurðsson | 1936 Summer | |
| Óskar Sigurpálsson | Weightlifting | 1968 Summer, 1972 Summer | |
| Brady Sih | Chinese Taipei | Sailing | 1996 Summer | |
| Bryant Sih | 1996 Summer | |
| Ayouba Ali Sihame | Comoros | Swimming | 2012 Summer | |
| Yu Sihan [ Wikidata ] | China | Fencing | 2024 Summer | |
| Aukusti Sihvola | Finland | Wrestling | 1928 Summer | |
| Iris Sihvonen | Speed skating | 1960 Winter | |
| Maarit Sihvonen | Swimming | 1984 Summer | |
| Olavi Sihvonen | Cross country skiing, Nordic combined | 1948 Winter | |
| Väinö Siikaniemi | Athletics | 1912 Summer | |
| Veiko Siimar | Soviet Union | Swimming | 1960 Summer | |
| Kristo Siimer [ Wikidata ] | Estonia | Biathlon | 2022 Winter | |
| Juha Siira | Finland | Sailing | 1976 Summer, 1980 Summer | |
| Hannu Siitonen | Athletics | 1972 Summer, 1976 Summer | |
| Pauli Siitonen | Cross country skiing | 1968 Winter | |
| Alette Sijbring | Netherlands | Water polo | 2008 Summer | |
| Sijoma [ Wikidata ] | Belgium | Art competitions | 1928 Summer | |
| Tobi Sijuade | Nigeria | Swimming | 2024 Summer | |
| Márton Sík | Hungary | Canoe sprint | 2008 Summer | |
| Danylo Sikan | Ukraine | Football | 2024 Summer | |
| Jyotirmoyee Sikdar | India | Athletics | 1996 Summer | |
| András Sike | Hungary | Wrestling | 1988 Summer, 1992 Summer | |
| József Sike | Shooting | 1992 Summer, 1996 Summer, 2000 Summer | |
| Anton Sikharulidze | Russia | Figure skating | 1998 Winter, 2002 Winter | |
| Hanne Sikiö | Finland | Ice hockey | 2002 Winter | |
| Tuija Sikiö | Biathlon | 1992 Winter, 1994 Winter | |
| Slavko Sikirić | Yugoslavia | Judo | 1980 Summer | |
| Evald Sikk | Estonia | Wrestling | 1936 Summer | |
| Cobie Sikkens | Netherlands | Swimming | 1968 Summer | |
| Maarten Sikking | Field hockey | 1972 Summer, 1976 Summer | |
| Gergely Siklósi | Hungary | Fencing | 2020 Summer, 2024 Summer | |
| Helena Šikolová | Czechoslovakia | Cross country skiing | 1972 Winter | |
| Bartosz Sikora | Poland | Swimming | 1996 Summer | |
| Dariusz Sikora | Ice hockey | 1980 Winter | |
| Rafał Sikora | Athletics | 2012 Summer | |
| Tomasz Sikora | Biathlon | 1994 Winter, 1998 Winter, 2002 Winter, 2006 Winter, 2010 Winter | |
| Andrzej Sikorski | Track cycling | 1988 Summer | |
| Krystian Sikorski | Ice hockey | 1984 Winter, 1988 Winter | |
| Olga Šikovec | Yugoslavia | Athletics | 1960 Summer | |
| Annette Sikveland | Norway | Biathlon | 1994 Winter, 1998 Winter | |
| Theerapong Silachai | Thailand | Weightlifting | 2024 Summer | |
| Čaba Silađi | Serbia | Swimming | 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Isaac Silafau | American Samoa | Athletics | 2016 Summer | |
| Florica Silaghi | Romania | Rowing | 1980 Summer | |
| Valentin Silaghi | Boxing | 1980 Summer | |
| Ileana Silai | Athletics | 1968 Summer, 1972 Summer, 1976 Summer, 1980 Summer | |
| Alekseï Silaïev [ Wikidata ] | Russia | Ski jumping | 2002 Winter | |
| Hilding Silander | Finland | Sailing | 1936 Summer | |
| Anastasiia Silanteva | Russian Olympic Committee | Alpine skiing | 2018 Winter | |
| Jānis Silarājs | Latvia | Bobsleigh | 2002 Winter | |
| Isidore Silas | Cameroon | Judo | 1984 Summer | |
| Johnathan Silas [ Wikidata ] | Vanuatu | Swimming | 2024 Summer | |
| Aleksandr Silayev | Soviet Union | Canoe sprint | 1960 Summer | |
| Otto Silber | Estonia | Football | 1924 Summer | |
| Kristin Silbereisen | Germany | Table tennis | 2012 Summer | |
| Elaine Silburn | Canada | Athletics | 1948 Summer | |
| Vita Silchenko | Belarus | Fencing | 2004 Summer | |
| Boris Silchev | Soviet Union | Boxing | 1952 Summer | |
| Donald Sild | Estonia | Athletics | 1996 Summer | |
| Kelly Sildaru | Freestyle skiing | 2022 Winter | |
| Kiliann Sildillia | France | Football | 2024 Summer | |
| Armando Silega | Cuba | Canoe sprint | 1992 Summer | |
| Cosmas Silei | Kenya | Athletics | 1972 Summer | |
| John Silén | Finland | Sailing | 1912 Summer | |
| William Silen | Puerto Rico | Athletics | 1972 Summer | |
| Megan Sileno | South Africa | Water polo | 2020 Summer | |
| Howard Siler | United States | Bobsleigh | 1972 Winter, 1980 Winter | |
| Ronald Siler | Boxing | 2004 Summer | |
| Sileshi Sihine | Ethiopia | Athletics | 2004 Summer, 2008 Summer | |
| Ramón Silfa | Dominican Republic | Weightlifting | 1968 Summer | |
| Diederik van Silfhout | Netherlands | Equestrian dressage | 2016 Summer | |
| Jean van Silfhout | Swimming, Water polo, Rowing | 1920 Summer, 1924 Summer, 1928 Summer | |
| Jakob Silfverberg | Sweden | Ice hockey | 2014 Winter | |
| Nils Silfverskiöld | Artistic gymnastics | 1912 Summer | |
| Lennart Silfverstolpe | Tennis | 1912 Summer | |
| Carl Silfverstrand | Athletics, Artistic gymnastics | 1908 Summer, 1912 Summer | |
| Alfred Silginer | Italy | Luge | 1980 Winter | |
| Olga Šilhánová | Czechoslovakia | Artistic gymnastics | 1948 Summer | |
| Zdeňka Šilhavá | Czechoslovakia, Czech Republic | Athletics | 1980 Summer, 1988 Summer, 1996 Summer | |
| Josef Šilhavý | Czechoslovakia | 1976 Summer | |
| Daniel Sili | Brazil | Water polo | 1952 Summer | |
| Nataliya Silianova | Ukraine | Basketball | 1996 Summer | |
| Dražen Silić | Croatia | Bobsleigh | 2018 Winter | |
| Yusidey Silié | Cuba | Volleyball | 2008 Summer | |
| Emanuela Silimbani | Italy | Basketball | 1980 Summer | |
| Andrei Šilin | Estonia | Rowing | 2000 Summer, 2004 Summer | |
| Antonio Silio | Argentina | Athletics | 1992 Summer, 1996 Summer | |
| Bounhom Siliphone | Laos | 1992 Summer | |
| Carlo Silipo | Italy | Water polo | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer | |
| Daniela Silivaș | Romania | Artistic gymnastics | 1988 Summer | |
| Harry Siljander | Finland | Boxing | 1948 Summer, 1952 Summer | |
| Radovan Siljevski | Serbia | Swimming | 2008 Summer, 2012 Summer | |
| Dave Silk | United States | Ice hockey | 1980 Winter | |
| Dave Silk | Speed skating | 1988 Winter | |
| Volha Silkina | Belarus | Modern pentathlon | 2020 Summer | |
| William Sylvester Silkworth | United States | Shooting | 1924 Summer | |
| Foday Sillah | Sierra Leone | Athletics | 1992 Summer, 1996 Summer | |
| László Sillai | Hungary | Wrestling | 1968 Summer | |
| Müzahir Sille | Turkey | 1956 Summer, 1960 Summer, 1964 Summer | |
| Henrik Sillem | Netherlands | Shooting | 1900 Summer | |
| Pauline Sillett | Great Britain | Swimming | 1964 Summer | |
| Max Sillig | Switzerland | Ice hockey | 1920 Summer | |
| Lynn Silliman | United States | Rowing | 1976 Summer | |
| Mike Silliman | Basketball | 1968 Summer | |
| Vassilios Sillis | Greece | Athletics | 1952 Summer, 1960 Summer | |
| Victor Sillon | France | 1948 Summer, 1956 Summer, 1960 Summer | |
| Sam Sills | Great Britain | Sailing | 2024 Summer | |
| Andrey Silnov | Russia | Athletics | 2008 Summer, 2012 Summer | |
| Arturo Silot | Cuba | Wrestling | 2024 Summer | |
| Haralds Silovs | Latvia | Speed skating, Short track speed skating | 2010 Winter, 2014 Winter, 2018 Winter, 2022 Winter | |
| Juris Silovs | Soviet Union | Athletics | 1972 Summer, 1976 Summer | |
| Juris Silovs | Latvia | Road cycling | 1996 Summer | |
| Saroch Silpikul | Thailand | Shooting | 1960 Summer | |
| Sanna Siltakorpi | Finland | Equestrian eventing | 2024 Summer | |
| Pentti Siltaloppi | Athletics | 1948 Summer | |
| Mohamed Siluvangi | Democratic Republic of the Congo | Boxing | 1992 Summer | |
| Iván Felipe Silva Morales | Cuba | Judo | 2016 Summer, 2020 Summer, 2024 Summer | |
| Adalberto Silva | Brazil | Handball | 2004 Summer | |
| Adenízia da Silva | Volleyball | 2012 Summer, 2016 Summer | |
| Adhemar da Silva | Athletics | 1948 Summer, 1952 Summer, 1956 Summer, 1960 Summer | |
| Adilson Silva | Boxing | 1992 Summer | |
| Adilson da Silva | Golf | 2016 Summer | |
| Adriana da Silva | Athletics | 2012 Summer, 2016 Summer | |
| Adriano da Silva | Portugal | Sailing | 1968 Summer | |
| Affonso da Silva | Brazil | Athletics | 1960 Summer | |
| Albino da Silva | Portugal | Shooting | 1960 Summer | |
| Alcino Silva | São Tomé and Príncipe | Canoe sprint | 2008 Summer | |
| Aldemir da Silva Júnior | Brazil | Athletics | 2012 Summer, 2016 Summer, 2020 Summer | |
| Alejandro Silva | Puerto Rico | Boxing | 1976 Summer | |
| Alejandro Silva | Chile | Athletics | 1984 Summer | |
| Alex Silva | Brazil | Football | 2008 Summer | |
| Aline Silva | Handball | 2000 Summer, 2004 Summer | |
| Altobeli da Silva | Athletics | 2016 Summer, 2020 Summer | |
| Álvaro Silva | Portugal | Fencing | 1952 Summer | |
| Álvaro Silva | Athletics | 1988 Summer, 1992 Summer | |
| Ana Carolina da Silva | Brazil | Volleyball | 2020 Summer, 2024 Summer | |
| Ana Caroline Silva | Athletics | 2024 Summer | |
| Ana Cláudia Silva | Artistic gymnastics | 2008 Summer | |
| André Silva | Rugby sevens | 2016 Summer | |
| Andrés Silva | Uruguay | Athletics | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Anísio Silva | Brazil | 1992 Summer, 1996 Summer | |
| Anselmo da Silva | 2008 Summer | |
| Anubes da Silva | 1960 Summer | |
| Arnaldo da Silva | 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer | |
| Augusto Silva | Portugal | Football | 1928 Summer | |
| Bernardo Silva | Sailing | 1968 Summer | |
| Bianca Silva | Brazil | Rugby sevens | 2020 Summer, 2024 Summer | |
| Carlos Silva | Chile | Athletics | 1948 Summer | |
| Carlos Silva | Guatemala | Shooting | 1980 Summer, 1984 Summer, 1988 Summer | |
| Carlos Silva | Portugal | Athletics | 1996 Summer | |
| Carmen Silva | Brazil | Taekwondo | 2000 Summer | |
| Chayenne da Silva | Athletics | 2020 Summer, 2024 Summer | |
| Claudinei da Silva | Athletics, Bobsleigh | 1996 Summer, 2000 Summer, 2006 Winter | |
| Cleverson da Silva | Athletics | 1996 Summer | |
| Cristóbal Silva | Chile | Cycling mountain bike | 2004 Summer, 2008 Summer | |
| Daniel Chaves da Silva | Brazil | Athletics | 2020 Summer | |
| Danny Silva | Portugal | Cross country skiing | 2006 Winter, 2010 Winter | |
| Delfim José da Silva | Rowing | 1948 Summer | |
| Delmo da Silva | Brazil | Athletics | 1976 Summer | |
| Derick Silva | 2020 Summer | |
| Diogo Silva | Taekwondo | 2004 Summer, 2012 Summer | |
| Djamila Silva [ Wikidata ] | Cape Verde | Judo | 2024 Summer | |
| Duarte Silva | Portugal | Alpine skiing | 1952 Winter | |
| Edinanci Silva | Brazil | Judo | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer | |
| Edson Silva | Canoe sprint | 2016 Summer | |
| Eduardo Silva | Chile | Alpine skiing | 1952 Winter | |
| Edward Silva | Uruguay | Weightlifting | 1996 Summer | |
| Emanuel Silva | Portugal | Canoe sprint | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Erlon Silva | Brazil | 2012 Summer, 2016 Summer | |
| Ernesto Silva | Chile | Equestrian dressage | 1952 Summer | |
| Evaldo da Silva | Brazil | Athletics | 1984 Summer | |
| Fabiana Silva | Badminton | 2020 Summer | |
| Fábio Gonçalves Silva | Bobsleigh | 2014 Winter | |
| Felipe Silva | Water polo | 2016 Summer | |
| Felipe Silva | Rugby sevens | 2016 Summer | |
| Felipe França Silva | Swimming | 2008 Summer, 2012 Summer, 2016 Summer | |
| Fernanda Silva | Volleyball | 1980 Summer, 1984 Summer | |
| Fernanda da Silva | Road cycling | 2012 Summer | |
| Fernanda da Silva | Handball | 2012 Summer, 2016 Summer | |
| Fernando Silva | Portugal | Athletics | 1972 Summer | |
| Fernando Silva | Badminton | 1992 Summer | |
| Fernando Silva | Brazil | Swimming | 2008 Summer | |
| Francisco da Silva | Portugal | Fencing | 1968 Summer | |
| Gabriella Silva | Brazil | Swimming | 2008 Summer | |
| Gabrielle da Silva | Rhythmic gymnastics | 2016 Summer | |
| Geovani Silva | Football | 1988 Summer | |
| Germán Silva | Mexico | Athletics | 1992 Summer, 1996 Summer | |
| Giant Silva | Brazil | Basketball | 1988 Summer | |
| Gustavo Henrique Silva | Handball | 2004 Summer | |
| Haroldo da Silva | Athletics | 1948 Summer | |
| Hélcio da Silva | 1952 Summer | |
| Hélder Silva | Portugal | Canoe sprint | 2016 Summer | |
| Hélio Silva | Brazil | Swimming | 1948 Summer | |
| Hélio Silva | Water polo | 1984 Summer | |
| Hélio da Silva | Athletics | 1948 Summer | |
| Hermes Silva | Nicaragua | Boxing | 1968 Summer | |
| Holder da Silva | Guinea-Bissau | Athletics | 2008 Summer, 2012 Summer, 2016 Summer | |
| Ilídio Silva | Portugal | Rowing | 1960 Summer | |
| Izabela da Silva | Brazil | Athletics | 2020 Summer, 2024 Summer | |
| Jackie Silva | Volleyball, Beach volleyball | 1980 Summer, 1984 Summer, 1996 Summer | |
| João Clemente da Silva | Athletics | 1932 Summer | |
| João da Silva | Boxing | 1964 Summer | |
| João Paulo de Silva | Angola | Shooting | 2000 Summer, 2016 Summer | |
| João Pedro Silva | Portugal | Triathlon | 2012 Summer, 2016 Summer, 2020 Summer | |
| João Pedro Silva | Brazil | Handball | 2016 Summer, 2020 Summer | |
| Joaquim Silva | Portugal | Equestrian eventing, Equestrian jumping | 1952 Summer, 1956 Summer, 1960 Summer, 1964 Summer | |
| Joaquim Silva | Athletics | 1988 Summer | |
| Joel Silva | Venezuela | Volleyball | 2008 Summer | |
| John da Silva | New Zealand | Wrestling | 1956 Summer | |
| Joice Silva | Brazil | 2012 Summer, 2016 Summer | |
| Jonathan Henrique Silva | Athletics | 2012 Summer | |
| Jorge Silva | Boxing | 1996 Summer | |
| Jorge da Silva | Athletics | 1988 Summer, 1992 Summer | |
| José da Silva | Portugal | Shooting | 1948 Summer | |
| José Silva | Sailing | 1956 Summer | |
| José da Silva | Canoe sprint | 1992 Summer | |
| José João da Silva | Brazil | Athletics | 1984 Summer | |
| Joseildo da Silva | 1992 Summer | |
| Juan Silva | Chile | 1956 Summer, 1960 Summer | |
| Juliana Silva | Brazil | Beach volleyball | 2012 Summer | |
| L. Alvar da Silva [ Wikidata ] | Art competitions | 1924 Summer | |
| Leandro Silva | Equestrian dressage | 2008 Summer | |
| Léia Silva | Volleyball | 2016 Summer | |
| Leila Cássia Silva | Rugby sevens | 2020 Summer, 2024 Summer | |
| Leônidas da Silva | Swimming | 1936 Summer | |
| Lígia Silva | Table tennis | 2000 Summer, 2004 Summer, 2012 Summer | |
| Luana Silva | Surfing | 2024 Summer | |
| Lucila Vianna da Silva | Handball | 2000 Summer, 2004 Summer, 2008 Summer | |
| Lucimara da Silva | Athletics | 2008 Summer | |
| Luís Silva | Portugal | Fencing | 1992 Summer | |
| Luís da Silva | Brazil | Athletics | 1972 Summer | |
| Luiz da Silva | Water polo | 1932 Summer | |
| Luiz Maurício da Silva | Athletics | 2024 Summer | |
| Manex Silva [ Wikidata ] | Cross country skiing | 2022 Winter | |
| Manoel da Silva | Portugal | Shooting | 1960 Summer | |
| Manuel Silva | 1992 Summer, 1996 Summer, 2008 Summer | |
| Manuel Silva | Athletics | 2000 Summer, 2004 Summer | |
| Márcio Silva | Brazil | Bobsleigh | 2006 Winter | |
| Maria Paula Silva | Basketball | 1992 Summer, 1996 Summer | |
| Mariana Silva | Judo | 2012 Summer, 2016 Summer | |
| Mariano Silva | Argentina | Field hockey | 1988 Summer | |
| Mário Silva | Portugal | Road cycling | 1960 Summer | |
| Mário Silva | Athletics | 1988 Summer, 1992 Summer | |
| Mario De Silva | Italy | Wrestling | 1960 Summer | |
| Maurício Borges Silva | Brazil | Volleyball | 2016 Summer, 2020 Summer | |
| Mauro Vinícius da Silva | Athletics | 2008 Summer, 2012 Summer | |
| Miguel Silva Júnior | Road cycling | 1972 Summer | |
| Mônica da Silva | Volleyball | 1984 Summer | |
| Natália Silva | Portugal | Artistic gymnastics | 1952 Summer | |
| Nilo da Silva | Brazil | Modern pentathlon | 1956 Summer | |
| Olinto Silva | Venezuela | Road cycling | 1980 Summer | |
| Orlando Silva | Chile | Basketball | 1952 Summer, 1956 Summer | |
| Oscar da Silva | Brazil | Equestrian jumping | 1960 Summer | |
| Osmiro Silva | Athletics | 1992 Summer, 2000 Summer | |
| Paulo Silva | Swimming | 1948 Summer | |
| Pedro Silva | Portugal | 2000 Summer, 2004 Summer | |
| Pedro da Silva | Brazil | Athletics | 1992 Summer | |
| Peter Silva | Boxing | 1988 Summer | |
| Rafael Silva | Judo | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Rafaela Silva | 2012 Summer, 2016 Summer, 2024 Summer | |
| Raquel Silva | Volleyball | 2000 Summer | |
| René Silva | Nicaragua | Boxing | 1972 Summer | |
| Roberto Silva | Mexico | Athletics | 1968 Summer | |
| Robson Caetano | Brazil | 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer | |
| Rogerio Silva | Mozambique | Swimming | 1980 Summer | |
| Rosa María Silva | Uruguay | 1984 Summer | |
| Rui Silva | Portugal | Athletics | 2000 Summer, 2004 Summer | |
| Rui Silva | Handball | 2020 Summer | |
| Rui da Silva | Brazil | Athletics | 1976 Summer | |
| Rui Pedro Silva | Portugal | 2008 Summer, 2012 Summer, 2016 Summer | |
| Sally da Silva | Brazil | Bobsleigh | 2014 Winter | |
| Serafino Silva | Venezuela | Road cycling | 1976 Summer | |
| Silvina Pereira | Brazil | Athletics | 1976 Summer | |
| Solonei da Silva | 2016 Summer | |
| Soter Da Silva | Tanzania | Field hockey | 1980 Summer | |
| Stephen Da Silva | 1980 Summer | |
| Sunil Munic Silva [ Wikidata ] | Sri Lanka | Weightlifting | 1984 Summer | |
| Talles Silva | Brazil | Athletics | 2016 Summer | |
| Tatiane Raquel da Silva | 2020 Summer, 2024 Summer | |
| Thiago Silva | Football | 2008 Summer, 2012 Summer | |
| Tiago Silva | Portugal | 2016 Summer | |
| Valdinei da Silva | Brazil | Athletics | 1996 Summer | |
| Valeria Silva | Peru | Swimming | 2004 Summer, 2008 Summer | |
| Vânia Silva | Portugal | Athletics | 2004 Summer, 2008 Summer, 2012 Summer | |
| Vítor Silva | Football | 1928 Summer | |
| Wagner da Silva | Brazil | Basketball | 1980 Summer | |
| Washington Silva | Boxing | 2004 Summer, 2008 Summer | |
| Welisson Silva | Weightlifting | 2008 Summer, 2016 Summer | |
| Yadira Silva | Mexico | Table tennis | 2008 Summer, 2012 Summer, 2016 Summer | |
| Yarisley Silva | Cuba | Athletics | 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Lauri Silván | Finland | Ice hockey | 1952 Winter | |
| Benjamin Silva-Netto | Philippines | Athletics | 1968 Summer | |
| Antônio da Silveira | Brazil | Shooting | 1932 Summer | |
| Apolinário de Silveira | Angola | Boxing | 1988 Summer | |
| Caio da Silveira | Brazil | Basketball | 1996 Summer | |
| Henrique da Silveira | Portugal | Fencing | 1920 Summer, 1924 Summer, 1928 Summer, 1936 Summer | |
| Juan Hernández Silveira | Cuba | Water polo | 1992 Summer | |
| Luis Silveira | Handball | 2000 Summer | |
| Nicole Silveira | Brazil | Skeleton | 2022 Winter | |
| Pedro Silveira | Mexico | Sailing | 1996 Summer | |
| Rodrigo da Silveira | Portugal | Equestrian jumping | 1956 Summer | |
| Valdemar de Silveira | Brazil | Weightlifting | 1952 Summer | |
| Esko Silvennoinen | Finland | Field hockey | 1952 Summer | |
| Hemmo Silvennoinen | Ski jumping | 1956 Winter | |
| Lauri Silvennoinen | Cross country skiing | 1948 Winter | |
| Emily Silver | United States | Swimming | 2008 Summer | |
| Damian Silvera | Football | 1996 Summer | |
| Suzanne Silvercruys | Belgium | Art competitions | 1932 Summer | |
| Nicasio Silverio | Cuba | Swimming | 1948 Summer, 1952 Summer | |
| George Silvernail | Puerto Rico | Shooting | 1968 Summer | |
| Jamie Silverstein | United States | Figure skating | 2006 Winter | |
| Dennis Silverthorne | Great Britain | 1948 Winter | |
| Winifred Silverthorne | 1948 Winter | |
| Jay Silvester | United States | Athletics | 1964 Summer, 1968 Summer, 1972 Summer, 1976 Summer | |
| Antônio Silvestre | Brazil | Track cycling | 1980 Summer, 1988 Summer | |
| Federico Silvestri | Italy | Swimming | 1980 Summer | |
| Paolo Silvestri | Freestyle skiing | 1992 Winter | |
| Russ Silvestri | United States | Sailing | 2000 Summer | |
| Umberto Silvestri | Italy | Wrestling | 1936 Summer, 1948 Summer, 1952 Summer | |
| Evelyn Silvestro | Argentina | Rowing | 2020 Summer, 2024 Summer | |
| Silvinho | Brazil | Football | 1984 Summer | |
| Anselmo Silvino | Italy | Weightlifting | 1968 Summer, 1972 Summer | |
| Gerben Silvis | Netherlands | Water polo | 2000 Summer | |
| Bhupendra Silwal | Nepal | Athletics | 1964 Summer | |
| Odiya Silweya | Malawi | 1984 Summer, 1988 Summer | |
| Ben Sim | Australia | Cross country skiing | 2010 Winter | |
| Sim Bok-seok | South Korea | Athletics | 1948 Summer | |
| Sim Deok-seop | 1984 Summer, 1988 Summer | |
| Sim Gyu-hae | Sailing | 1988 Summer | |
| Sim Hae-in | Handball | 2012 Summer, 2016 Summer, 2020 Summer | |
| Sim Jae-won | Football | 2000 Summer | |
| Sim Jae-young | Taekwondo | 2020 Summer | |
| Sim Kwon-ho | Wrestling | 1996 Summer, 2000 Summer | |
| Letitia Sim [ Wikidata ] | Singapore | Swimming | 2024 Summer | |
| Levenia Sim [ Wikidata ] | 2024 Summer | |
| Sim Mun-seop | South Korea | Shooting | 1960 Summer | |
| Sim Myeong-hui | 1960 Summer | |
| Sim Sang-min | Football | 2016 Summer | |
| Sim Sang-ok | Athletics | 1956 Summer | |
| Stuart Sim | Australia | Rowing | 2020 Summer | |
| Welson Sim | Malaysia | Swimming | 2016 Summer, 2020 Summer | |
| Michal Šíma | Slovakia | Biathlon | 2018 Winter, 2022 Winter | |
| Ondrej Šima | Czechoslovakia | Shooting | 1968 Summer | |
| Ladislaus Simacek | Austria | Athletics | 1936 Summer | |
| Sabrina Simader | Kenya | Alpine skiing | 2018 Winter | |
| Jeroen Simaeys | Belgium | Football | 2008 Summer | |
| Farid Simaika | Egypt | Diving | 1928 Summer | |
| Jan Šimák | Czech Republic | Football | 2000 Summer | |
| John Siman | United States | Water polo | 1984 Summer | |
| Jiří Šimánek | Czech Republic | Rowing | 2020 Summer, 2024 Summer | |
| Hendrik Simangunsong | Indonesia | Boxing | 1992 Summer, 1996 Summer | |
| Anastasia Simanovich | Russia, Russian Olympic Committee | Water polo | 2016 Summer, 2020 Summer | |
| Dzianis Simanovich | Belarus | Athletics | 2008 Summer, 2012 Summer, 2016 Summer | |
| Pedro Simão | Brazil | Shooting | 1948 Summer, 1952 Summer, 1956 Summer | |
| André Simard | Canada | Artistic gymnastics | 1972 Summer | |
| Geneviève Simard | Alpine skiing | 2002 Winter, 2006 Winter | |
| Sophie Simard | Swimming | 1996 Summer | |
| Cristian Javier Simari Birkner | Argentina | Alpine skiing | 2002 Winter, 2006 Winter, 2010 Winter, 2014 Winter | |
| Macarena Simari Birkner | 2002 Winter, 2006 Winter, 2010 Winter, 2014 Winter | |
| María Belén Simari Birkner | 2002 Winter, 2006 Winter, 2010 Winter | |
| Thomas Simart | France | Canoe sprint | 2016 Summer | |
| Mário Simas | Portugal | Swimming | 1948 Summer | |
| Fyodor Simashev | Soviet Union | Cross country skiing | 1968 Winter, 1972 Winter | |
| Corinne Simasotchi | Switzerland | Athletics | 1996 Summer | |
| Titus Simba | Tanzania | Boxing | 1968 Summer, 1972 Summer | |
| Boston Simbeye | Malawi | 1988 Summer | |
| Akani Simbine | South Africa | Athletics | 2016 Summer, 2020 Summer, 2024 Summer | |
| Samuel Simbo | Sierra Leone | Boxing | 1988 Summer | |
| Alphonce Simbu | Tanzania | Athletics | 2016 Summer, 2020 Summer, 2024 Summer | |
| Zora Simčáková | Czechoslovakia | Cross country skiing | 1992 Winter | |
| Elfie Simchen | Germany | Freestyle skiing | 1994 Winter | |
| Kostiantyn Simchuk | Ukraine | Ice hockey | 2002 Winter | |
| Anna Simcic | New Zealand | Swimming | 1992 Summer, 1996 Summer | |
| Dave Sime | United States | Athletics | 1960 Summer | |
| George Sime | Great Britain | Field hockey | 1948 Summer | |
| Amanda Simeão | Brazil | Fencing | 2016 Summer | |
| Martin Šimeček | Czechoslovakia, Czech Republic | Figure skating | 1992 Winter, 1994 Winter, 1998 Winter | |
| Miroslav Šimek | Canoe slalom | 1992 Summer, 1996 Summer | |
| Isaac Simelane | Eswatini | Athletics | 1992 Summer, 1996 Summer | |
| Musa Simelane | Boxing | 2000 Summer | |
| Dubravko Šimenc | Yugoslavia, Croatia | Water polo | 1988 Summer, 1996 Summer, 2000 Summer, 2004 Summer | |
| Miha Šimenc | Slovenia | Cross country skiing | 2018 Winter, 2022 Winter | |
| Zlatko Šimenc | Yugoslavia | Water polo | 1960 Summer, 1964 Summer | |
| Karen Simensen | Norway | Figure skating | 1928 Winter | |
| Gabriel Simeon | Grenada | Athletics | 1992 Summer | |
| Richson Simeon | Marshall Islands | 2016 Summer | |
| Silvano Simeon | Italy | 1972 Summer, 1976 Summer | |
| Diego Simeone | Argentina | Football | 1996 Summer | |
| Giovanni Simeone | 2016 Summer | |
| Giuliano Simeone | 2024 Summer | |
| Roldano Simeoni | Italy | Water polo | 1972 Summer, 1976 Summer, 1980 Summer | |
| Sara Simeoni | Athletics | 1972 Summer, 1976 Summer, 1980 Summer, 1984 Summer | |
| Aleksandar Simeonov | Bulgaria | Bobsleigh | 1988 Winter | |
| Ivan Simeonov | Canoe sprint | 1960 Summer | |
| Kaspar Simeonov | Volleyball | 1980 Summer | |
| Nikola Simeonov | Athletics | 1968 Summer | |
| Vencislav Simeonov | Italy | Volleyball | 2004 Summer | |
| Zdravko Simeonov | Bulgaria | 1968 Summer, 1972 Summer | |
| Jackie Simes | United States | Track cycling | 1960 Summer, 1964 Summer, 1968 Summer | |
| Wilhelm Simetsreiter | Germany | Football | 1936 Summer | |
| Cyril Simey | Great Britain | Fencing | 1928 Summer | |
| Ana Šimić | Croatia | Athletics | 2012 Summer, 2016 Summer, 2020 Summer | |
| Branislav Simić | Yugoslavia | Wrestling | 1956 Summer, 1964 Summer, 1968 Summer | |
| Danijela Simić | Rhythmic gymnastics | 1984 Summer | |
| Ljubiša Simić | Boxing | 1984 Summer, 1988 Summer | |
| Mateja Šimic | Slovenia | Triathlon | 2012 Summer, 2016 Summer | |
| Nikola Simić | Yugoslavia | Football | 1920 Summer | |
| Judit Simics | Hungary | Handball | 2000 Summer | |
| Atanas Simidchiev | Bulgaria | Cross country skiing | 1984 Winter, 1988 Winter | |
| Eveliina Similä | Finland | Ice hockey | 2006 Winter | |
| Tero Similä | Cross country skiing | 2006 Winter | |
| Vasilie Simiocenco | Romania | Canoe sprint | 1972 Summer, 1976 Summer | |
| Adrian Simion | Handball | 1984 Summer | |
| Aurel Simion | Boxing | 1968 Summer | |
| Carmen Simion | Canoe sprint | 1992 Summer | |
| Dario Simion | Switzerland | Ice hockey | 2022 Winter | |
| Dorel Simion | Romania | Boxing | 2000 Summer | |
| Gheorghe Simion | 1984 Summer | |
| Marian Simion | 1996 Summer, 2000 Summer, 2004 Summer | |
| Nicolae Simion | Rowing | 1976 Summer, 1980 Summer | |
| Viorel Simion [ Wikidata ] | Boxing | 2004 Summer | |
| Carlo Simionato | Italy | Athletics | 1984 Summer | |
| Chiara Simionato | Speed skating | 2002 Winter, 2006 Winter, 2010 Winter | |
| Pedro Simionato | Argentina | Road cycling | 1960 Summer | |
| Silviu Simioncencu | Romania | Canoe sprint | 2004 Summer | |
| Nicolae Simionenco | 1976 Summer | |
| Vlăduț Simionescu | Judo | 2012 Summer, 2020 Summer | |
| Gheorghe Simionov | Canoe sprint | 1976 Summer | |
| Toma Simionov | 1980 Summer, 1984 Summer | |
| Meaghan Simister | Canada | Luge | 2006 Winter, 2010 Winter | |
| Loise Simiyu [ Wikidata ] | Kenya | Volleyball | 2024 Summer | |
| Reza Simkhah | Iran | Wrestling | 1988 Summer, 1992 Summer | |
| Toyi Simklina | Togo | Athletics | 1988 Summer | |
| Imre Simkó | Hungary | Shooting | 1960 Summer, 1964 Summer | |
| Pavel Šimko | Slovakia | Triathlon | 2008 Summer | |
| Jindřiška Šimková | Czechoslovakia | Shooting | 1992 Summer | |
| Gil Simkovitch | Israel | 2008 Summer | |
| Bernhard Simmelbauer | West Germany | Artistic gymnastics | 1984 Summer, 1988 Summer | |
| Christian Simmen | Switzerland | Athletics | 1924 Summer | |
| Gian Simmen | Snowboarding | 1998 Winter, 2002 Winter, 2006 Winter | |
| Matthias Simmen | Biathlon | 2002 Winter, 2006 Winter, 2010 Winter | |
| Georgia Simmerling | Canada | Alpine skiing, Freestyle skiing, Track cycling | 2010 Winter, 2014 Winter, 2016 Summer, 2020 Summer | |
| Magdalena Simmermacher | Argentina | Golf | 2020 Summer | |
| Caitlin Simmers | United States | Surfing | 2024 Summer | |
| Mathrin Simmers | South Africa | Rugby sevens | 2024 Summer | |
| Omar Simmonds Pea | Panama | Judo | 2012 Summer | |
| Henry Simmonds | Canada | Sailing | 1932 Summer | |
| Joshua Simmonds | Australia | Field hockey | 2020 Summer | |
| Kerry Simmonds | United States | Rowing | 2016 Summer | |
| Lizzie Simmonds | Great Britain | Swimming | 2008 Summer, 2012 Summer | |
| Ann Simmons | United States | 1972 Summer | |
| Bradley Simmons | Shooting | 1976 Summer | |
| Cale Simmons | Athletics | 2016 Summer | |
| Charles Simmons | Great Britain | Artistic gymnastics | 1912 Summer | |
| Coralie Simmons | United States | Water polo | 2000 Summer | |
| David Simmons | New Zealand | Rowing | 1976 Summer | |
| Erin Simmons | Canada | Snowboarding | 2006 Winter | |
| Floyd Simmons | United States | Athletics | 1948 Summer, 1952 Summer | |
| Harry Simmons | Great Britain | 1928 Summer | |
| John Simmons | Canoe sprint | 1948 Summer | |
| Mark Simmons | Canada | Boxing | 2000 Summer | |
| Penny Simmons | Bermuda | Sailing | 1964 Summer, 1968 Summer, 1972 Summer, 1976 Summer | |
| Phil Simmons | Great Britain | Rowing | 2004 Summer | |
| Tony Simmons | Athletics | 1976 Summer | |
| Tyrone Simmons | United States | Fencing | 1972 Summer | |
| Will Simmons | Art competitions | 1936 Summer | |
| Heather Simmons-Carrasco | Artistic swimming | 1996 Summer | |
| Charles Simms | Artistic gymnastics | 1952 Summer, 1956 Summer | |
| Christel Simms | Philippines | Swimming | 2008 Summer | |
| Tony Simms | Canada | Basketball | 1984 Summer | |
| József Simó | Hungary | Rowing | 1948 Summer | |
| Lajos Simó | Handball | 1972 Summer | |
| Philippe Simo | Cameroon | Judo | 1980 Summer | |
| Dušan Šimočko | Slovakia | Biathlon | 2006 Winter, 2010 Winter | |
| Aniceto Simões | Portugal | Athletics | 1976 Summer | |
| Antônio Simões | Brazil | Equestrian jumping | 1972 Summer | |
| Gabriel Simões [ Wikidata ] | Sailing | 2024 Summer | |
| José Edvar Simões | Basketball | 1964 Summer, 1968 Summer | |
| Oswaldo Simões Filho | Judo | 1980 Summer | |
| Nóra Simóka | Hungary | Modern pentathlon | 2000 Summer | |
| Raija Simola | Finland | Artistic gymnastics | 1952 Summer | |
| Seppo Simola | Athletics | 1972 Summer | |
| Ágnes Simon | Hungary | Cross country skiing | 2014 Winter | |
| Albert Simon | Luxembourg | Art competitions | 1924 Summer | |
| Andrés Simón | Cuba | Athletics | 1992 Summer, 1996 Summer | |
| Angelo Simon | Tanzania | 2000 Summer | |
| Armand Simon | Switzerland | Tennis | 1920 Summer | |
| Attila Simon | Hungary | Athletics | 1960 Summer, 1964 Summer | |
| Attila Simon | Shooting | 2004 Summer | |
| Béla Simon | Rowing | 2012 Summer, 2016 Summer | |
| Charles Simon [ Wikidata ] | France | Artistic gymnastics | 1900 Summer | |
| David Simon | United States | Rowing | 2000 Summer | |
| Diederik Simon | Netherlands | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Edgardo Simón | Argentina | Track cycling | 1996 Summer, 2000 Summer | |
| Ernest Simon | Australia | Fencing | 1972 Summer, 1976 Summer | |
| Erwin Simon | Germany | Swimming | 1936 Summer | |
| Francisc Șimon | Romania | Water polo | 1952 Summer, 1956 Summer | |
| František Šimon | Czechoslovakia | Cross country skiing | 1976 Winter, 1980 Winter | |
| Gabriel Simon | Argentina | Athletics | 2000 Summer | |
| George Simon | Trinidad and Tobago | 1968 Summer | |
| Gilles Simon | France | Tennis | 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Hans Simon | West Germany | Water polo | 1972 Summer, 1976 Summer | |
| Harry Simon | United States | Shooting | 1908 Summer | |
| Harry Simon | Namibia | Boxing | 1992 Summer | |
| Hermann Simon | Germany | Wrestling | 1928 Summer | |
| Hugo Simon | Austria | Equestrian jumping | 1972 Summer, 1976 Summer, 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer | |
| István Simon | Hungary | Athletics | 1936 Summer | |
| Iuliana Simon | Romania | Cross country skiing | 1956 Winter | |
| Jácint Simon | Hungary | Swimming | 2000 Summer | |
| Jacques Simon | France | Field hockey | 1928 Summer | |
| Jacques Simon | Road cycling | 1960 Summer | |
| János Simon | Hungary | Basketball | 1952 Summer, 1960 Summer | |
| Julia Simon | France | Biathlon | 2022 Winter | |
| Jürgen Simon | Germany | Track cycling | 1960 Summer | |
| Krunoslav Simon | Croatia | Basketball | 2016 Summer | |
| Kyah Simon | Australia | Football | 2016 Summer, 2020 Summer | |
| Ladislau Șimon | Romania | Wrestling | 1976 Summer | |
| LeJuan Simon | Trinidad and Tobago | Athletics | 2004 Summer | |
| Lidia Șimon | Romania | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Martial Simon | France | 1920 Summer | |
| Matt Simon | Australia | Football | 2008 Summer | |
| Mircea Șimon | Romania | Boxing | 1976 Summer | |
| Nanny Simon | Netherlands | Artistic gymnastics | 1952 Summer | |
| Nathalie Simon | France | Athletics | 1988 Summer | |
| Nelson Simon | Cuba | Rowing | 1976 Summer, 1980 Summer | |
| Pál Simon | Hungary | Athletics | 1908 Summer | |
| Petra Simon | Handball | 2024 Summer | |
| Rebeka Simon | Great Britain | Canoe sprint | 2016 Summer | |
| Rosana Simón | Spain | Taekwondo | 2008 Summer | |
| Rudi Simon | Belgium | Athletics | 1968 Summer | |
| Russell Simon | Australia | Basketball | 1976 Summer | |
| Stan Simon | Great Britain | Ice hockey | 1948 Winter | |
| Thiago Simon | Brazil | Swimming | 2016 Summer | |
| Thibaut Simon | France | Water polo | 2016 Summer | |
| Unai Simón | Spain | Football | 2020 Summer | |
| Wolfgang Simon | West Germany | Volleyball | 1972 Summer | |
| Jakub Šimoňák | Slovakia | Luge | 2018 Winter | |
| Katarína Šimoňáková | 2018 Winter, 2022 Winter | |
| Viðar Símonarson | Iceland | Handball | 1972 Summer | |
| Nazzareno Simonato | Italy | Rowing | 1960 Summer | |
| Agide Simonazzi | Athletics | 1920 Summer | |
| Davide Simoncelli | Alpine skiing | 2006 Winter, 2010 Winter, 2014 Winter | |
| Stefano Simoncelli | Fencing | 1972 Summer, 1976 Summer | |
| André Simond | France | Alpine skiing | 1956 Winter | |
| François Simond | 1992 Winter, 1998 Winter | |
| George Simond | Great Britain | Tennis | 1908 Summer | |
| Gérard Simond | France | Ice hockey | 1928 Winter | |
| Jean-Christophe Simond | Figure skating | 1976 Winter, 1980 Winter, 1984 Winter | |
| Paul Simond | Cross country skiing | 1928 Winter | |
| André de la Simone | Equestrian eventing | 1952 Summer | |
| Lenika de Simone | Spain | Artistic gymnastics | 2008 Summer | |
| Simone Plourde | Canada | Athletics | 2024 Summer | |
| Dan Simoneau | United States | Cross country skiing | 1984 Winter, 1988 Winter | |
| Jacqueline Simoneau | Canada | Artistic swimming | 2016 Summer, 2020 Summer, 2024 Summer | |
| Lorenzo Simonelli | Italy | Athletics | 2024 Summer | |
| Diego Simonet | Argentina | Handball | 2012 Summer, 2020 Summer, 2024 Summer | |
| Hans Simonet | Switzerland | Shooting | 1964 Summer | |
| Jean Simonet | Belgium | Athletics | 1952 Summer | |
| Pablo Simonet | Argentina | Handball | 2016 Summer, 2020 Summer, 2024 Summer | |
| Sebastián Simonet | 2012 Summer, 2016 Summer, 2020 Summer | |
| Américo Simonetti | Chile | Equestrian jumping | 1964 Summer, 1972 Summer, 1984 Summer | |
| Carlo Simonetti | Italy | Modern pentathlon | 1928 Summer, 1932 Summer | |
| Mauro Simonetti | Road cycling | 1968 Summer | |
| Vito Simonetti | Argentina | Fencing | 1948 Summer, 1952 Summer | |
| Noemí Simonetto de Portela | Athletics | 1948 Summer | |
| Marialaura Simonetto | Italy | Swimming | 2008 Summer | |
| Ugo Simoni | Shooting | 1964 Summer | |
| John Simonian | Kenya | Field hockey | 1960 Summer, 1964 Summer, 1968 Summer | |
| Anita Simonis | United States | Artistic gymnastics | 1948 Summer | |
| Jacob Simonis | Netherlands | Wrestling | 1928 Summer | |
| Simon Simonis | Cyprus | Archery | 1992 Summer | |
| Timo Simonlatser | Estonia | Cross country skiing | 2010 Winter | |
| Joseph Simonon | Belgium | Boxing | 1920 Summer | |
| Inna Simonova | Kazakhstan | Short track speed skating | 2014 Winter | |
| Katarina Simonović | Serbia | Swimming | 2016 Summer | |
| Ljubodrag Simonović | Yugoslavia | Basketball | 1972 Summer | |
| Marko Simonović | Serbia | 2016 Summer | |
| Alexandra Simons de Ridder | Germany | Equestrian dressage | 2000 Summer | |
| Amory Simons | United States | Art competitions | 1932 Summer | |
| Ann Simons | Belgium | Judo | 2000 Summer | |
| Ben Simons | Great Britain | Bobsleigh | 2014 Winter, 2018 Winter | |
| François Simons | Belgium | Swimming | 1964 Summer, 1968 Summer | |
| Gray Simons | United States | Wrestling | 1960 Summer, 1964 Summer | |
| Gregory Simons | Bermuda | Athletics | 1976 Summer, 1984 Summer | |
| Jozef Simons | Belgium | Track cycling | 1980 Summer | |
| Kenzo Simons | Netherlands | Swimming | 2024 Summer | |
| Kip Simons | United States | Artistic gymnastics | 1996 Summer | |
| Nancy Simons | Swimming | 1956 Summer | |
| Willy Simons | Belgium | Water polo | 1948 Summer | |
| Allan Simonsen | Denmark | Football | 1972 Summer | |
| Axel Simonsen | Norway | Athletics | 1912 Summer | |
| Bengt Simonsen | Sweden | 1976 Summer, 1980 Summer, 1984 Summer | |
| Erik Simonsen | Denmark | 1952 Summer | |
| Helle Simonsen | Curling | 2014 Winter | |
| Mikael Simonsen | Rowing | 1912 Summer | |
| Nils-Torolv Simonsen | Norway | 2000 Summer, 2004 Summer | |
| Rudolph Simonsen | Denmark | Art competitions | 1928 Summer | |
| Alexandre Simonson | Belgium | Fencing | 1908 Summer, 1920 Summer | |
| Ivan Simonsson | Sweden | Rowing | 1952 Summer | |
| Jason Simontacchi | Italy | Baseball | 2000 Summer | |
| Nikita Simonyan | Soviet Union | Football | 1956 Summer | |
| Arpad Simonyik | Canada | Canoe sprint | 1964 Summer, 1968 Summer | |
| Charles Simotwo | Kenya | Athletics | 2020 Summer | |
| Gennadi Simov | Bulgaria | Road cycling | 1936 Summer | |
| Stefania Simova | Athletics | 1992 Summer | |
| Youssouf Simpara | Mali | 2000 Summer | |
| Amanda Simper | Australia | Canoe sprint | 2000 Summer | |
| Charles Simpkins | United States | Athletics | 1988 Summer, 1992 Summer | |
| Harold Simpkins [ Wikidata ] | Golf | 1904 Summer | |
| Alan Simpson | Great Britain | Athletics | 1964 Summer | |
| Andrew Simpson | Sailing | 2008 Summer, 2012 Summer | |
| Bob Simpson | Canada | Basketball | 1952 Summer | |
| Brandon Simpson | Jamaica | Athletics | 2004 Summer | |
| Bruce Simpson | Canada | 1972 Summer, 1976 Summer | |
| Charles Walter Simpson | Great Britain | Art competitions | 1924 Summer, 1928 Summer, 1932 Summer, 1948 Summer | |
| Dene Simpson | South Africa | Canoe sprint | 1992 Summer | |
| Diane Simpson-Bundy | United States | Rhythmic gymnastics | 1988 Summer | |
| Esau Simpson | Grenada | Swimming | 2012 Summer | |
| Frederick Simpson | Canada | Athletics | 1908 Summer | |
| Frederick Simpson | Great Britain | Boxing | 1936 Summer | |
| George Simpson | United States | Athletics | 1932 Summer | |
| Hack Simpson | Canada | Ice hockey | 1932 Winter | |
| J. F. Simpson [ Wikidata ] | Great Britain | Artistic gymnastics | 1908 Summer | |
| Janet Simpson | Athletics | 1964 Summer, 1968 Summer, 1972 Summer | |
| Jemma Simpson | 2008 Summer | |
| Jenny Simpson | United States | 2008 Summer, 2012 Summer, 2016 Summer | |
| John Simpson | Australia | Fencing | 1960 Summer | |
| Judy Simpson | Great Britain | Athletics | 1980 Summer, 1984 Summer, 1988 Summer | |
| Juliene Simpson | United States | Basketball | 1976 Summer | |
| Kerry Simpson | Canada | Speed skating | 2006 Winter | |
| Lynn Simpson | Great Britain | Canoe slalom | 1992 Summer, 1996 Summer | |
| Malcolm Simpson | New Zealand | Track cycling | 1952 Summer | |
| Margaret Simpson | Ghana | Athletics | 2004 Summer | |
| Miguel Simpson | Costa Rica | Football | 1984 Summer | |
| Molly Simpson | Canada | Cycling BMX racing | 2024 Summer | |
| Pascal Simpson | Sweden | Football | 1992 Summer | |
| Rene Simpson | Canada | Tennis | 1992 Summer | |
| Rhona Simpson | Great Britain | Field hockey | 1996 Summer, 2000 Summer | |
| Ronnie Simpson | Football | 1948 Summer | |
| Sam Simpson | Australia | Artistic gymnastics | 2008 Summer | |
| Sherone Simpson | Jamaica | Athletics | 2004 Summer, 2008 Summer, 2012 Summer | |
| Tom Simpson | Great Britain | Track cycling | 1956 Summer | |
| Trevor Simpson | Diving | 1976 Summer | |
| Will Simpson | United States | Equestrian jumping | 2008 Summer | |
| Bella Sims | Swimming | 2020 Summer | |
| Heath Sims | Wrestling | 2000 Summer | |
| Sanders Sims | Field hockey | 1948 Summer | |
| Emre Şimşek | Turkey | Alpine skiing | 2014 Winter | |
| Kenan Şimşek | Wrestling | 1992 Summer | |
| Sibel Şimşek | Weightlifting | 2004 Summer, 2012 Summer | |
| Päivi Simukka | Finland | Cross country skiing | 1992 Winter | |
| Ambwene Simukonda | Malawi | Athletics | 2012 Summer | |
| František Šimůnek | Czechoslovakia | Nordic combined, Ski jumping, Cross country skiing | 1932 Winter, 1936 Winter, 1948 Winter | |
| František Šimůnek | Weightlifting | 1936 Summer | |
| Jaromír Šimůnek | Biathlon | 1980 Winter, 1984 Winter, 1988 Winter | |
| Vladimír Šimůnek | Cross country skiing | 1952 Winter | |
| Boštjan Šimunič | Slovenia | Athletics | 2004 Summer | |
| Asimenye Simwaka | Malawi | 2020 Summer, 2024 Summer | |
| Moses Simwala | Zambia | Football | 1980 Summer | |
| Sin Chang-mu | South Korea | Equestrian dressage | 1988 Summer | |
| Sin Chol-bom | North Korea | Weightlifting | 2012 Summer | |
| Sin Da-woon | South Korea | Short track speed skating | 2014 Winter | |
| Sin Dong-ui | Wrestling | 1964 Summer | |
| Sin Du-ho | Fencing | 1964 Summer | |
| Sin Gwang-su | Sailing | 1988 Summer | |
| Sin Gwang-suk | Fencing | 1964 Summer | |
| Sin Jeong-seop | Volleyball | 1996 Summer | |
| Sin Joon-sik | Taekwondo | 2000 Summer | |
| Sin Jung-ja | Basketball | 2008 Summer | |
| Sin Mi-gyeong | Field hockey | 2000 Summer | |
| Sin Myong-ok | North Korea | Artistic gymnastics | 1980 Summer | |
| Sin Myong-su | 1992 Summer | |
| Sin Nam-ho | Shooting | 1992 Summer | |
| Sin Sang-sik | South Korea | Wrestling | 1964 Summer, 1968 Summer | |
| Sin Seok-gyo | Field hockey | 1996 Summer | |
| Sin Seok-gyun | 1988 Summer | |
| Sin Seon-ho | Volleyball | 2000 Summer | |
| Sin Song-hui | North Korea | Archery | 1992 Summer | |
| Sin Su-yeong | South Korea | Boxing | 1996 Summer | |
| Armin Sinančević | Serbia | Athletics | 2020 Summer, 2024 Summer | |
| Areti Sinapidou | Greece | Rhythmic gymnastics | 1992 Summer | |
| Anton Sinapov | Bulgaria | Biathlon | 2018 Winter, 2022 Winter | |
| Seth Sincere | Nigeria | Football | 2016 Summer | |
| Yelena Sinchukova | Russia | Athletics | 1996 Summer | |
| Adam Sinclair | India | Field hockey | 2004 Summer | |
| Alan Sinclair | Great Britain | Rowing | 2016 Summer | |
| Alex Sinclair | Canada | 1912 Summer | |
| Alexander Sinclair | Ice hockey | 1936 Winter | |
| Christine Sinclair | Football | 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Colin Sinclair | Australia | Boxing | 1924 Summer | |
| Debra Sinclair | United States | Shooting | 1992 Summer | |
| Edward Sinclair | Great Britain | Swimming | 2000 Summer | |
| Keith Sinclair | Field hockey | 1968 Summer, 1972 Summer | |
| Kenia Sinclair | Jamaica | Athletics | 2008 Summer, 2016 Summer | |
| Luis Sinclair | Panama | Basketball | 1968 Summer | |
| Rebecca Sinclair | New Zealand | Snowboarding | 2010 Winter, 2014 Winter | |
| Scott Sinclair | Great Britain | Football | 2012 Summer | |
| Gabriel Sîncrăian | Romania | Weightlifting | 2012 Summer, 2016 Summer | |
| Jaromír Šindel | Czechoslovakia | Ice hockey | 1984 Winter, 1988 Winter | |
| Jan Šindelář | Czech Republic | Bobsleigh | 2018 Winter, 2022 Winter | |
| Petr Šindelář | Snowboarding | 2010 Winter | |
| Ulrike Sindelar-Pachowsky | Austria | Diving | 1964 Summer | |
| Bradly Sinden | Great Britain | Taekwondo | 2020 Summer, 2024 Summer | |
| Harry Sinden | Canada | Ice hockey | 1960 Winter | |
| Tara Singh Sindhu | Malaysia | Field hockey | 1964 Summer | |
| Stephen Sinding | Norway | Luge | 1972 Winter | |
| Holger Sinding-Larsen | Art competitions | 1920 Summer | |
| Harry Sindle | United States | Sailing | 1960 Summer | |
| Marek Šindler | Czech Republic | Canoe slalom | 2016 Summer | |
| Vilém Šindler | Czechoslovakia | Athletics | 1924 Summer, 1928 Summer | |
| Francisco Sindreu | Spain | Tennis | 1924 Summer | |
| Vanxay Sinebandith | Laos | Athletics | 1992 Summer | |
| Charles Sinek | United States | Figure skating | 2002 Winter | |
| Pentti Sinersaari | Finland | Athletics | 1980 Summer | |
| Kurt Sinette | Trinidad and Tobago | Boxing | 1996 Summer | |
| Ian Sinfield | Australia | Athletics | 1960 Summer | |
| Iris Sing | Brazil | Taekwondo | 2016 Summer | |
| Zeno von Singalewicz [ Wikidata ] | Austria | Swimming | 1912 Summer | |
| Prisca Singamo [ Wikidata ] | Malawi | Athletics | 1992 Summer | |
| Josephine Mary Singarayar | Malaysia | 1988 Summer | |
| Heike Singer | East Germany | Canoe sprint | 1988 Summer | |
| Joachim Singer | Germany | Athletics | 1964 Summer | |
| Karin Singer | Switzerland | Artistic swimming | 1984 Summer, 1988 Summer | |
| Susann Singer | Germany | Judo | 1996 Summer | |
| Herbert Singerman | Canada | Wrestling | 1968 Summer | |
| Max Singewald | Austria | Ice hockey | 1956 Winter | |
| Jonny Singfield | Great Britain | Rowing | 1992 Summer | |
| Ajit Singh Balla | India | Athletics | 1956 Summer | |
| Rohtas Singh Dahiya | Wrestling | 1984 Summer | |
| Mohinder Singh Gill | Athletics | 1972 Summer | |
| Dilbagh Singh Kler | Malaysia | 1964 Summer | |
| Nitendra Singh Rawat | India | 2016 Summer | |
| Bahadur Singh Sagoo | 2000 Summer, 2004 Summer | |
| Nashatar Singh Sidhu | Malaysia | 1964 Summer, 1968 Summer | |
| Ajay Raj Singh | India | 2000 Summer | |
| Ajit Singh | 1960 Summer | |
| Ajit Pal Singh | Field hockey | 1968 Summer, 1972 Summer, 1976 Summer | |
| Ajmer Singh | Athletics | 1964 Summer | |
| Ajmer Singh Chopra | Basketball | 1980 Summer | |
| Akashdeep Singh | Field hockey | 2016 Summer | |
| Akshdeep Singh | Athletics | 2024 Summer | |
| Alvin Singh | Fiji | Football | 2016 Summer | |
| Amarjit Singh | Great Britain | Wrestling | 1996 Summer | |
| Annu Raj Singh | India | Shooting | 2012 Summer | |
| Arvind Singh | Rowing | 2020 Summer | |
| Avtar Singh | Judo | 2016 Summer | |
| Bakshish Singh | Field hockey | 1956 Summer | |
| Bakshish Singh | Wrestling | 1956 Summer | |
| Balbir Singh Grewal | Field hockey | 1968 Summer | |
| Balbir Singh Sr. | 1948 Summer, 1952 Summer, 1956 Summer | |
| Baldev Singh | Athletics | 1948 Summer | |
| Baldev Singh | Field hockey | 1976 Summer | |
| Baldev Singh | Basketball | 1980 Summer | |
| Baljinder Singh | Athletics | 2012 Summer | |
| Balkrishan Singh | Field hockey | 1956 Summer | |
| Balwinder Singh | 1988 Summer | |
| Banta Singh | Wrestling | 1948 Summer | |
| Bhim Singh | Athletics | 1968 Summer | |
| Bishambar Singh | Wrestling | 1964 Summer, 1968 Summer | |
| Bishnu Bahadur Singh | Nepal | Boxing | 1988 Summer | |
| Chain Singh | India | Shooting | 2016 Summer | |
| Ajit Singh | Field hockey | 1976 Summer | |
| Chand Singh | 1976 Summer | |
| Charanjit Singh | 1960 Summer, 1964 Summer | |
| Chhota Singh | Athletics | 1948 Summer | |
| Dalip Singh | 1924 Summer, 1928 Summer | |
| Darshan Singh | Field hockey | 1964 Summer | |
| Darya Singh | Equestrian eventing | 1980 Summer | |
| Davendra Singh | Fiji | Athletics | 1988 Summer, 1992 Summer | |
| Davinder Singh | India | Field hockey | 1980 Summer | |
| Devendro Singh | Boxing | 2012 Summer | |
| Devi Singh | Wrestling | 1956 Summer | |
| Devi Singh | Shooting | 1964 Summer | |
| Dhanraj Singh | Guyana | Boxing | 1968 Summer | |
| Dharam Singh | India | Field hockey | 1952 Summer | |
| Dharam Singh | 1964 Summer | |
| Dharamvir Singh | 2012 Summer | |
| Didar Singh | 1992 Summer | |
| Dilpreet Singh | 2020 Summer | |
| Dingko Singh | Boxing | 2000 Summer | |
| Esha Singh | Shooting | 2024 Summer | |
| Gabbar Singh | Canada | Field hockey | 2008 Summer | |
| Gagan Ajit Singh | India | 2000 Summer, 2004 Summer | |
| Gaurika Singh | Nepal | Swimming | 2016 Summer, 2020 Summer | |
| Gian Singh | Malaya | Field hockey | 1956 Summer | |
| Gian Singh | India | Wrestling | 1984 Summer | |
| Grahanandan Singh | Field hockey | 1948 Summer, 1952 Summer | |
| Gurbachan Singh | Athletics | 1928 Summer | |
| Gurbaj Singh | Field hockey | 2012 Summer | |
| Gurbinder Singh | Wrestling | 2000 Summer | |
| Gurbux Singh | Field hockey | 1964 Summer, 1968 Summer | |
| Gurcharan Singh | Boxing | 1996 Summer, 2000 Summer | |
| Gurdev Singh | Field hockey | 1956 Summer | |
| Gurjant Singh | 2020 Summer, 2024 Summer | |
| Gurmail Singh | 1980 Summer | |
| Gurmeet Singh | Athletics | 2012 Summer, 2016 Summer | |
| Gurnam Singh | 1948 Summer | |
| Gurpreet Singh | Shooting | 2016 Summer | |
| Gurpreet Singh | Athletics | 2020 Summer | |
| Gurtej Singh | 1984 Summer | |
| Hanuman Singh | Basketball | 1980 Summer | |
| Harbhajan Singh | 1980 Summer | |
| Harbinder Singh | Field hockey | 1964 Summer, 1968 Summer, 1972 Summer | |
| Harcharan Singh | 1972 Summer, 1976 Summer | |
| Hardeep Singh | 1984 Summer | |
| Hardeep Singh | Wrestling | 2016 Summer | |
| Hardik Singh | Field hockey | 2020 Summer, 2024 Summer | |
| Hardyal Singh | 1956 Summer | |
| Harmanpreet Singh | 2016 Summer, 2020 Summer, 2024 Summer | |
| Harmik Singh | 1968 Summer, 1972 Summer | |
| Harpal Singh | 2004 Summer | |
| Harpreet Singh | 1992 Summer, 1996 Summer | |
| Inder Singh | 1968 Summer | |
| Inderpal Singh | Rowing | 2000 Summer | |
| Jagbir Singh | Field hockey | 1988 Summer, 1992 Summer | |
| Jagdev Singh | Athletics | 1956 Summer | |
| Jagdish Singh | Cross country skiing | 2018 Winter | |
| Jagjit Singh | Field hockey | 1964 Summer, 1968 Summer | |
| Jagmal Singh | Athletics | 1960 Summer | |
| Jagmander Singh | Wrestling | 1980 Summer, 1984 Summer | |
| Jagmohan Singh | Athletics | 1960 Summer | |
| Jagnandan Singh | Kenya | Field hockey | 1960 Summer | |
| Jagrup Singh | India | Wrestling | 1972 Summer | |
| Jaipal Singh Munda | Field hockey | 1928 Summer | |
| Jarmanpreet Singh | 2024 Summer | |
| Jarnail Singh | Football | 1960 Summer | |
| Jasvir Singh | Canada | Weightlifting | 2008 Summer | |
| Jaswant Singh | India | Field hockey | 1960 Summer | |
| Jaypal Singh | Tanzania | 1980 Summer | |
| Jit Singh | India | Wrestling | 1964 Summer | |
| Joginder Singh | Field hockey | 1960 Summer, 1964 Summer | |
| Jorawar Singh | Basketball | 1980 Summer | |
| Jugraj Singh | Athletics | 1972 Summer | |
| K. D. Singh | Field hockey | 1948 Summer, 1952 Summer | |
| Kaliq Singh | Boxing | 1984 Summer | |
| Karni Singh | Shooting | 1960 Summer, 1964 Summer, 1968 Summer, 1972 Summer, 1980 Summer | |
| Kartar Singh | Wrestling | 1980 Summer, 1984 Summer, 1988 Summer | |
| Khajan Singh | Swimming | 1988 Summer | |
| Kuldeep Singh | Wrestling | 1988 Summer | |
| Kulwant Singh | Field hockey | 1972 Summer | |
| Labh Singh | Athletics | 1964 Summer | |
| Lakha Singh | Boxing | 1996 Summer | |
| Luther Singh | South Africa | Football | 2020 Summer | |
| Madho Singh | India | Wrestling | 1960 Summer, 1964 Summer | |
| Mahabir Singh | 1980 Summer, 1984 Summer | |
| Mahadeo Singh | Athletics | 1924 Summer | |
| Makhan Singh | 1964 Summer | |
| Malwa Singh | Wrestling | 1964 Summer | |
| Mandeep Singh | Field hockey | 2020 Summer, 2024 Summer | |
| Manjeet Singh | Rowing | 2008 Summer, 2012 Summer | |
| Manpreet Singh | Field hockey | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Mansher Singh | Shooting | 1984 Summer, 1996 Summer, 2004 Summer, 2008 Summer | |
| Marlon Singh | Virgin Islands | Sailing | 1984 Summer | |
| Mehanga Singh Sidhu | India | Athletics | 1952 Summer | |
| Mehtab Singh | Boxing | 1972 Summer | |
| Milkha Singh | Athletics | 1956 Summer, 1960 Summer, 1964 Summer | |
| Mohinder Singh | 1956 Summer | |
| Mohinder Singh | Field hockey | 1976 Summer | |
| Mohinder Pal Singh | 1988 Summer | |
| Mukhbain Singh | 1972 Summer | |
| Mukhtiar Singh | Wrestling | 1968 Summer, 1972 Summer | |
| Narendar Bisth Singh | Boxing | 1992 Summer | |
| Narender Singh | Judo | 1992 Summer, 1996 Summer | |
| Neelam Jaswant Singh | Athletics | 2000 Summer, 2004 Summer | |
| Pala Singh | 1924 Summer | |
| Pangambam Nilakomol Singh | Field hockey | 1984 Summer | |
| Paramjit Singh | Basketball | 1980 Summer | |
| Paramjit Singh | Athletics | 2000 Summer | |
| Pargat Singh | Field hockey | 1988 Summer, 1992 Summer, 1996 Summer | |
| Paul Cheema Singh | Shooting | 1960 Summer | |
| Prabhjot Singh | Field hockey | 2004 Summer | |
| Pramdiph Singh [ Wikidata ] | Basketball | 1980 Summer | |
| Pritam Singh | Artistic gymnastics | 1956 Summer | |
| Prithipal Singh | Field hockey | 1960 Summer, 1964 Summer, 1968 Summer | |
| Rahul Singh | 1996 Summer | |
| Rajinder Singh [ Wikidata ] | 1980 Summer | |
| Rajinder Singh | Wrestling | 1980 Summer, 1984 Summer | |
| Rajinder Singh Jr. | Field hockey | 1984 Summer | |
| Ramandeep Singh | 1996 Summer, 2000 Summer | |
| Ramandeep Singh | 2016 Summer | |
| Randhir Singh | Shooting | 1968 Summer, 1972 Summer, 1976 Summer, 1980 Summer, 1984 Summer | |
| Ranjit Singh | Athletics | 1980 Summer | |
| Ravinder Pal Singh | Field hockey | 1980 Summer, 1984 Summer | |
| Roop Singh | 1932 Summer, 1936 Summer | |
| Rupinder Pal Singh | 2016 Summer, 2020 Summer | |
| Sadhu Singh | Athletics | 1948 Summer | |
| Sajjan Singh | Wrestling | 1960 Summer | |
| Sandeep Singh | Field hockey | 2004 Summer, 2012 Summer | |
| Sandeep Singh | Shooting | 2024 Summer | |
| Sanjeev Singh | Archery | 1988 Summer | |
| Sarabjot Singh | Shooting | 2024 Summer | |
| Sardara Singh | Field hockey | 2012 Summer, 2016 Summer | |
| Sarpreet Singh | New Zealand | Football | 2024 Summer | |
| Satpal Singh | India | Wrestling | 1972 Summer, 1980 Summer | |
| Savinder Singh | Malaysia | Field hockey | 1968 Summer | |
| Sawarn Singh | India | Rowing | 2012 Summer | |
| Shakti Singh | Athletics | 1996 Summer, 2000 Summer | |
| Shamsher Singh | Field hockey | 2020 Summer, 2024 Summer | |
| Shivendra Singh | 2012 Summer | |
| Shivnath Singh | Athletics | 1976 Summer, 1980 Summer | |
| Shivpal Singh | 2020 Summer | |
| Shreyasi Singh | Shooting | 2024 Summer | |
| Simranjeet Singh | Field hockey | 2020 Summer | |
| Sohan Singh | Diving | 1964 Summer | |
| Soma Singh | Great Britain | Field hockey | 1996 Summer | |
| Soubam Suresh Singh | India | Boxing | 2000 Summer | |
| Sriram Singh | Athletics | 1972 Summer, 1976 Summer, 1980 Summer | |
| Suchha Singh | Track cycling | 1964 Summer | |
| Sudha Singh | Athletics | 2012 Summer, 2016 Summer | |
| Sukhjeet Singh | Field hockey | 2024 Summer | |
| Sukhjit Singh | 1992 Summer | |
| Surendra Singh | Athletics | 2008 Summer | |
| Trilochan Singh | Field hockey | 1948 Summer | |
| Tarsem Singh | 1968 Summer | |
| Thoiba Singh | 1988 Summer | |
| Trilok Singh | Artistic gymnastics | 1964 Summer | |
| Udham Singh | Field hockey | 1952 Summer, 1956 Summer, 1960 Summer, 1964 Summer | |
| Varinder Singh | 1972 Summer, 1976 Summer | |
| Vijender Singh | Boxing | 2004 Summer, 2008 Summer, 2012 Summer | |
| Vikash Singh | Athletics | 2024 Summer | |
| Vir Singh | Artistic gymnastics | 1952 Summer | |
| Virsa Singh | Athletics | 1960 Summer | |
| Vivek Singh | Field hockey | 1988 Summer | |
| Zora Singh | Athletics | 1960 Summer | |
| Sushmitha Singha Roy | 2008 Summer | |
| Supra Singhal | Uganda | Swimming | 2000 Summer | |
| Ian Single | Great Britain | Fencing | 1972 Summer | |
| Georgina Singleton | Judo | 2004 Summer | |
| Gordon Singleton | Canada | Track cycling | 1976 Summer | |
| Kraig Singleton | Virgin Islands | Swimming | 1988 Summer | |
| Kristan Singleton | 1988 Summer, 1992 Summer | |
| Pam Singleton | Australia | 1956 Summer | |
| Patrick Singleton | Bermuda | Luge, Skeleton | 1998 Winter, 2002 Winter, 2006 Winter | |
| Chom Singnoi | Thailand | Weightlifting | 2000 Summer | |
| Wilfried Singo | Ivory Coast | Football | 2020 Summer | |
| Panya Singprayool-Dinmuong [ Wikidata ] | Thailand | Road cycling | 1972 Summer, 1976 Summer | |
| Pipat Singsanee | Judo | 1964 Summer | |
| Karin Singstad | Norway | Handball | 1988 Summer | |
| Chatchai Sasakul | Thailand | Boxing | 1988 Summer | |
| Sinha | Mexico | Football | 2004 Summer | |
| Emilie Sinia | Belgium | Field hockey | 2012 Summer | |
| Kateřina Siniaková | Czech Republic | Tennis | 2020 Summer, 2024 Summer | |
| John Sinibaldi | United States | Road cycling, Track cycling | 1932 Summer, 1936 Summer | |
| Roberto Sinibaldi | Italy | Sailing | 1996 Summer | |
| María Alicia Sinigaglia | Argentina | Fencing | 1984 Summer | |
| Aminata Sininta | Mali | Basketball | 2008 Summer | |
| Sergio Sinistri | Argentina | Sailing | 1984 Summer | |
| Victoria Sinitsina | Russia, Russian Olympic Committee | Figure skating | 2014 Winter, 2022 Winter | |
| Yelena Sinitsina | Kazakhstan | Short track speed skating | 1994 Winter | |
| Dmitry Sinitsyn | Russia | Nordic combined | 1998 Winter | |
| Roland Sink | United States | Athletics | 1948 Summer | |
| Moffat Sinkala | Zambia | Football | 1980 Summer | |
| Aleksey Sinkevich | Belarus | Artistic gymnastics | 1996 Summer, 2000 Summer | |
| Vyacheslav Sinkevich | Russia | Swimming | 2012 Summer | |
| Yelena Sinkevich | Belarus | Cross country skiing | 1994 Winter, 1998 Winter | |
| Andrea Sinkó | Hungary | Rhythmic gymnastics | 1988 Summer | |
| Isaac Sinkot | Cameroon | Football | 1984 Summer | |
| Martin Sinković | Croatia | Rowing | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Valent Sinković | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Gabija Šinkūnaitė [ Wikidata ] | Lithuania | Alpine skiing | 2022 Winter | |
| Paul Sinkwitz | Germany | Art competitions | 1936 Summer | |
| Norbert Sinner | Luxembourg | Road cycling | 1928 Summer | |
| Gudrun Sinnhuber | Austria | Shooting | 1984 Summer | |
| Marlene Sinnig | Germany | Rowing | 2012 Summer | |
| Clarinda Sinnige | Netherlands | Field hockey | 2000 Summer, 2004 Summer | |
| Hans Sinniger | Switzerland | Shooting | 1968 Summer | |
| Alice Sinno | Italy | Sailing | 2016 Summer | |
| Gerry Sinnott | Ireland | Equestrian eventing | 1976 Summer | |
| Lucas Sinoia | Mozambique | Boxing | 1988 Summer, 1996 Summer | |
| Philip Sinon | Seychelles | Athletics | 1984 Summer | |
| Melania Sinoracka | Poland | 1948 Summer | |
| Zithulele Sinqe | South Africa | 1992 Summer | |
| Lin Sin-Rong [ Wikidata ] | Chinese Taipei | Luge | 2022 Winter | |
| Frits Sins | Netherlands | Canoe slalom | 1992 Summer, 1996 Summer | |
| Bunjong Sinsiri | Thailand | Boxing | 2024 Summer | |
| Chemene Sinson | Barbados | Artistic swimming | 1984 Summer | |
| Jan Sint [ Wikidata ] | Netherlands | Wrestling | 1912 Summer, 1920 Summer, 1924 Summer | |
| Andrei Sîntean | Romania | Football | 2020 Summer | |
| Renée Sintenis | Germany | Art competitions | 1928 Summer, 1932 Summer | |
| Victor Sintès | France, Algeria | Fencing | 2012 Summer, 2016 Summer | |
| Eelco Sintnicolaas | Netherlands | Athletics | 2012 Summer, 2016 Summer | |
| Andrew Sinton | Great Britain | Rowing | 1996 Summer | |
| Matt Sinton | New Zealand | Track cycling | 2000 Summer | |
| Anton Sintsov | Russia, Russian Olympic Committee | Cycling mountain bike | 2016 Summer, 2020 Summer | |
| Viktor Sinyak | Belarus | Weightlifting | 1996 Summer | |
| Aleksandr Sinyavsky | Ski jumping | 1994 Winter, 1998 Winter | |
| Vladimir Sinyavsky | Soviet Union | Wrestling | 1960 Summer | |
| Yevgeny Sinyayev | Athletics | 1968 Summer | |
| Karl Sinzinger [ Wikidata ] | Austria | Rowing | 1972 Summer | |
| Karl Sinzinger [ Wikidata ] | 1988 Summer, 1992 Summer | |
| Artur Siódmiak | Poland | Handball | 2008 Summer | |
| Sion [ Wikidata ] | France | Shooting | 1900 Summer | |
| Alesana Sione | American Samoa | Wrestling, Weightlifting | 1988 Summer, 2000 Summer | |
| Libor Sionko | Czech Republic | Football | 2000 Summer | |
| Gildo Siorpaes | Italy | Bobsleigh | 1964 Winter | |
| Sergio Siorpaes | 1964 Winter | |
| Wendy Siorpaes | Alpine skiing | 2006 Winter | |
| Rosefelo Siosi | Solomon Islands | Athletics | 2016 Summer | |
| Sobhi Sioud | Tunisia | Handball | 2000 Summer | |
| Adam Sioui | Canada | Swimming | 2008 Summer | |
| Siow Yi Ting | Malaysia | 2000 Summer, 2004 Summer, 2008 Summer | |
| Jaroslav Šíp | Czechoslovakia | Basketball | 1952 Summer | |
| Iuniarra Sipaia | Samoa | Weightlifting | 2024 Summer | |
| Ivan Šipajlo | Czechoslovakia | Bobsleigh | 1948 Winter | |
| Önder Şipal | Turkey | Boxing | 2016 Summer | |
| Onur Şipal | 2008 Summer, 2016 Summer | |
| Yuliya Siparenko | Ukraine | Alpine skiing | 2002 Winter, 2006 Winter | |
| Miro Sipek | Yugoslavia | Shooting | 1976 Summer | |
| Kilakone Siphonexay | Laos | Athletics | 2012 Summer | |
| Marin Šipić | Croatia | Handball | 2024 Summer | |
| Elis Sipilä | Finland | Artistic gymnastics | 1908 Summer | |
| Leena Sipilä | Athletics | 1952 Summer | |
| Martti Sipilä | Cross country skiing | 1948 Winter | |
| Tapio Sipilä | Wrestling | 1980 Summer, 1984 Summer, 1988 Summer | |
| Tauno Sipilä | Cross country skiing | 1952 Winter | |
| Väinö Sipilä | Athletics | 1924 Summer, 1928 Summer | |
| Adrián Sipos | Hungary | Handball | 2024 Summer | |
| Margit Sipos | Swimming | 1928 Summer | |
| Márton Sipos | 1924 Summer | |
| Matti Sippala | Finland | Athletics | 1932 Summer | |
| Lori Sippel | Canada | Softball | 1996 Summer | |
| Aulis Sipponen | Finland | Cross country skiing, Nordic combined | 1952 Winter | |
| Alejandro Siqueiros | Mexico | Swimming | 2004 Summer | |
| József Sir | Hungary | Athletics | 1936 Summer | |
| Irene Siragusa | Italy | 2020 Summer, 2024 Summer | |
| Fantaye Sirak | Ethiopia | 1980 Summer | |
| Petko Sirakov | Bulgaria | Wrestling | 1956 Summer | |
| Volodya Sirakov | Water polo | 1980 Summer | |
| Nikolaos Siranidis | Greece | Diving | 1996 Summer, 2000 Summer, 2004 Summer | |
| Sergey Sirant | Russian Olympic Committee | Badminton | 2020 Summer | |
| Marcel Sîrba | Romania | Boxing | 1980 Summer | |
| Aurel Sîrbu | Weightlifting | 1992 Summer | |
| Iosif Sîrbu | Shooting | 1952 Summer, 1956 Summer, 1960 Summer | |
| Marian Sîrbu | Canoe sprint | 2000 Summer | |
| Josef Širc | Czechoslovakia | Rowing | 1920 Summer | |
| Vladimír Širc | 1920 Summer | |
| Cornelia Sirch | East Germany | Swimming | 1988 Summer | |
| Kévin Sireau | France | Track cycling | 2008 Summer, 2012 Summer | |
| Chairuddin Siregar | Indonesia | Football | 1956 Summer | |
| Urho Sirén | Finland | Track cycling | 1952 Summer | |
| Ville Sirén | Ice hockey | 1984 Winter, 1992 Winter | |
| Kaili Sirge | Estonia | Cross country skiing | 2006 Winter | |
| Alejandro Siri | Argentina | Field hockey | 1988 Summer, 1992 Summer | |
| Siriguleng | China | Wrestling | 2008 Summer | |
| Pimsiri Sirikaew | Thailand | Weightlifting | 2012 Summer, 2016 Summer | |
| Benjamin Sirimou | Cameroon | Athletics | 1996 Summer, 2000 Summer | |
| Irina Sirina | Hungary | Handball | 2004 Summer | |
| Jakub Šiřina | Czech Republic | Basketball | 2020 Summer | |
| Siripong Siripool | Thailand | Badminton | 1992 Summer, 1996 Summer | |
| Chanom Sirirangsri | Athletics | 1964 Summer | |
| Damrong Sirisakorn | Sailing | 1976 Summer | |
| Ratapong Sirisanont | Swimming | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer | |
| Alexandru Sirițeanu | Romania | Fencing | 2012 Summer | |
| Viktor Sirkiä | Finland | Weightlifting | 1980 Summer | |
| Nehemia Sirkis | Israel | Shooting | 1964 Summer, 1968 Summer | |
| Susan Sirma | Kenya | Athletics | 1988 Summer, 1992 Summer | |
| Zigismunds Sirmais | Latvia | 2012 Summer, 2016 Summer | |
| Kevin Sirois | Canada | Speed skating | 1972 Winter | |
| Eva Široká | Czechoslovakia | Volleyball | 1968 Summer | |
| Tin Široki | Croatia | Alpine skiing | 2006 Winter | |
| Aleksejs Širokovs | Latvia | Ice hockey | 2010 Winter | |
| Jilen Siroky | United States | Swimming | 1996 Summer | |
| Hannes Sirola | Finland | Artistic gymnastics | 1912 Summer | |
| Melina Sirolli | Argentina | 2000 Summer | |
| Auguste Sirot | France | 1948 Summer | |
| Bogdan Sirotanović | Yugoslavia | Rowing | 1948 Summer | |
| Liudmila Sirotkina | Kyrgyzstan | Modern pentathlon | 2004 Summer | |
| Giovanni Sirovich | Italy | Fencing | 1992 Summer | |
| Judith Sirs | Great Britain | Swimming | 1972 Summer | |
| Tilen Sirše | Slovenia | Luge | 2018 Winter | |
| Idzard Sirtema | Netherlands | Equestrian eventing | 1920 Summer | |
| Henri Sirvain | France | Bobsleigh | 1968 Winter | |
| Juan Ignacio Sirvent | Spain | Sailing | 1968 Summer | |
| Arto Sirviö | Finland | Ice hockey | 1984 Winter | |
| Heili Sirviö | Skateboarding | 2024 Summer | |
| Vlado Sirvoň | Czechoslovakia | Volleyball | 1980 Summer | |
| John Siryakibbe | Uganda | Boxing | 1980 Summer, 1984 Summer | |
| Emerencia Siry-Király | Hungary | Volleyball | 1972 Summer, 1976 Summer, 1980 Summer | |
| Jana Šišajová | Slovakia | Luge | 2006 Winter, 2010 Winter | |
| Ben Sisay | Sierra Leone | Boxing | 1980 Summer | |
| Yury Sisikin | Soviet Union | Fencing | 1960 Summer, 1964 Summer, 1968 Summer | |
| Pieter Sisk | Belgium | Athletics | 2024 Summer | |
| Xénia Siska | Hungary | 1980 Summer | |
| Ramūnas Šiškauskas | Lithuania | Basketball | 2000 Summer, 2004 Summer, 2008 Summer | |
| Evaldas Šiškevičius | Road cycling | 2020 Summer | |
| Apóstolos Siskos [ Wikidata ] | Greece | Swimming | 2024 Summer | |
| Ingrid Šišković | Croatia | Volleyball | 2000 Summer | |
| Ivar Sisniega | Mexico | Modern pentathlon | 1980 Summer, 1984 Summer, 1988 Summer | |
| Marina Sisoeva | Uzbekistan | Weightlifting | 2012 Summer | |
| Guivi Sissaouri | Canada | Wrestling | 1996 Summer, 2000 Summer, 2004 Summer | |
| Sissi | Brazil | Football | 1996 Summer, 2000 Summer | |
| Issouf Sissokho | Mali | 2024 Summer | |
| Youba Sissokho | Spain | Boxing | 2016 Summer | |
| Djenebou Sissoko | Mali | Basketball | 2008 Summer | |
| Fodé Sissoko | Athletics | 2020 Summer, 2024 Summer | |
| Habib Sissoko | Judo | 1980 Summer | |
| Mohamed Sissoko | Football | 2004 Summer | |
| Emily Sisson | United States | Athletics | 2020 Summer, 2024 Summer | |
| Ann Sissons | New Zealand | Diving | 1984 Summer | |
| Ryan Sissons | Triathlon | 2012 Summer, 2016 Summer | |
| Ziad El-Sissy | Egypt | Fencing | 2020 Summer, 2024 Summer | |
| Helga María Sista | Argentina | Alpine skiing | 1968 Winter | |
| Amanda Sister | South Africa | Football | 2012 Summer | |
| Eva Sisth | Sweden | Canoe sprint | 1964 Summer | |
| Pedro Sisti | Argentina | Sailing | 1968 Summer, 1972 Summer | |
| Romeo Sisti | Italy | Rowing | 1928 Summer | |
| Bayram Şit | Turkey | Wrestling | 1952 Summer, 1956 Summer | |
| Damjan Sitar | Slovenia | Athletics | 2008 Summer | |
| Markellos Sitarenios | Greece | Water polo | 1980 Summer, 1984 Summer | |
| Jan Sitek | Poland | Field hockey | 1980 Summer | |
| Sitha Sin | Cambodia | Athletics | 1972 Summer | |
| Soukphaxay Sithisane | Laos | Judo | 2016 Summer, 2020 Summer | |
| Beáta Siti | Hungary | Handball | 1996 Summer, 2000 Summer | |
| Eszter Siti | 2004 Summer | |
| Karla Šitić | Croatia | Marathon swimming | 2012 Summer | |
| Volodymyr Sitkin | Soviet Union | Athletics | 1956 Summer | |
| Hubert Sitko | Poland | Ice hockey | 1964 Winter | |
| Nikolay Sitko | Soviet Union | Equestrian dressage | 1952 Summer, 1956 Summer | |
| Oleksandr Sitkovskyi | Ukraine | Athletics | 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Krzysztof Sitkowski | Poland | Basketball | 1960 Summer, 1964 Summer | |
| Marek Sitnik | Wrestling | 2000 Summer, 2004 Summer | |
| Alexei Sitnikov | Azerbaijan | Figure skating | 2014 Winter | |
| Igor Sitnikov | Kazakhstan | Swimming | 2000 Summer | |
| Pavel Sitnikov | Russian Olympic Committee | Short track speed skating | 2018 Winter, 2022 Winter | |
| Luca Sito | Italy | Athletics | 2024 Summer | |
| Mario Sitri | Boxing | 1956 Summer | |
| Peter Sitt | West Germany, Germany | Swimming | 1988 Summer, 1992 Summer | |
| Karl Sitter | Austria | Rowing | 1948 Summer | |
| Bert Sitters | Netherlands | Swimming | 1960 Summer, 1964 Summer | |
| John Sittig | United States | Athletics | 1928 Summer | |
| Christian Sittler | Austria | Boxing | 1976 Summer | |
| Pablo Sittler | Guatemala | Shooting | 1968 Summer | |
| Situ Guong | China | Athletics | 1936 Summer | |
| Masini Situ-Kumbanga | Democratic Republic of the Congo | 1984 Summer | |
| Kenneth Sitzberger | United States | Diving | 1964 Summer | |
| Dorota Siudek | Poland | Figure skating | 1998 Winter, 2002 Winter, 2006 Winter | |
| Mariusz Siudek | 1998 Winter, 2002 Winter, 2006 Winter | |
| Raimondas Šiugždinis | Lithuania | Sailing | 1992 Summer | |
| Ganna Siukalo | Ukraine | Handball | 2004 Summer | |
| Blackson Siukoko | Zambia | Boxing | 1980 Summer | |
| Moumouni Siuley | Niger | 1988 Summer | |
| Brian Jaya Siva | Malaysia | Field hockey | 1992 Summer, 1996 Summer | |
| Dzmitry Sivakou | Belarus | Athletics | 2008 Summer | |
| Pavel Sivakov | Russian Olympic Committee | Road cycling | 2020 Summer | |
| Sathish Sivalingam | India | Weightlifting | 2016 Summer | |
| Leopold Sivec | Austria | Ice hockey | 1984 Winter | |
| Helge Sivertsen | Norway | Athletics | 1936 Summer | |
| Kenneth Sivertsen | Alpine skiing | 2002 Winter | |
| Sigvard Sivertsen | Artistic gymnastics | 1908 Summer, 1912 Summer | |
| Sture Sivertsen | Cross country skiing | 1994 Winter, 1998 Winter | |
| Tomas Sivertsson | Sweden | Handball | 1996 Summer, 2000 Summer | |
| Stian Sivertzen | Norway | Snowboarding | 2010 Winter, 2014 Winter | |
| Darío Siviski | Argentina | Football | 1988 Summer | |
| Sergei Sivko | Soviet Union | Boxing | 1960 Summer | |
| Anna Sivkova | Russia | Fencing | 2004 Summer, 2012 Summer | |
| Kristína Sivoková [ Wikidata ] | Slovakia | Cross country skiing | 2022 Winter | |
| Marijo Šivolija | Croatia | Boxing | 2004 Summer, 2008 Summer | |
| Antti Sivonen | Finland | Cross country skiing | 1956 Winter | |
| Ivan Sivoplyasov | Soviet Union | Athletics | 1960 Summer | |
| Kanstantsin Sivtsov | Belarus | Road cycling | 2008 Summer, 2016 Summer | |
| Agnieszka Siwek | Poland | Athletics | 1988 Summer | |
| Tadeusz Siwek | Volleyball | 1968 Summer | |
| Miao Siwen | China | Football | 2020 Summer | |
| André Six | France | Swimming | 1900 Summer | |
| Albert Charles Six | Field hockey | 1928 Summer | |
| Christopher Six | Equestrian eventing | 2020 Summer | |
| Henri Six | Belgium | Fencing | 1908 Summer | |
| Pierre Six | France | Football | 1908 Summer | |
| Jane Sixsmith | Great Britain | Field hockey | 1988 Summer, 1992 Summer, 1996 Summer, 2000 Summer | |
| Eduardo Sixtos | Mexico | Volleyball | 1968 Summer | |
| Yan Siya [ Wikidata ] | China | Water polo | 2024 Summer | |
| Mariya Sizyakova | Soviet Union | Athletics | 1964 Summer | |