| Name | Nation | Sport | Games | Notes |
|---|
| Jô | Brazil | Football | 2008 Summer | |
| Jo Bo-ra | South Korea | Field hockey | 2000 Summer | |
| Jo Bun-hui | North Korea | Athletics | 2004 Summer, 2008 Summer | |
| Jo Byeong-hyeon | South Korea | Basketball | 1956 Summer | |
| Jo Byung-eun | Wrestling | 1988 Summer | |
| Jo Deuk-jun | Basketball | 1948 Summer | |
| Jo Dong-gi | Boxing | 1964 Summer | |
| Jo Geon-haeng | Road cycling | 1984 Summer | |
| Jo Gwang-je | Swimming | 1996 Summer | |
| Jo Ha-rang | Handball | 2020 Summer | |
| Jo Hea-jung | Volleyball | 1972 Summer, 1976 Summer | |
| Jo Hyeong-won | Equestrian eventing | 1964 Summer | |
| Jo Hyo-bi | Handball | 2012 Summer | |
| Jo Hyun-joo | Artistic gymnastics | 2008 Summer | |
| Jo Jae-hyeon | Road cycling | 1960 Summer | |
| Jo Jin-mi | North Korea | Diving | 2024 Summer | |
| Jo Jin-Saeng | South Korea | Athletics | 1988 Summer | |
| Jo Jin-seop | Sailing | 1984 Summer | |
| Jo Jong-ryol | North Korea | Artistic gymnastics | 1972 Summer | |
| Jo O-ryeon | South Korea | Swimming | 1972 Summer | |
| Jo Ryon-sik | North Korea | Boxing | 1980 Summer | |
| Jo Seok-hwan | South Korea | 2000 Summer, 2004 Summer | |
| Shoji Jo | Japan | Football | 1996 Summer | |
| Jo Song-nam | North Korea | Shooting | 1980 Summer | |
| Jo Su-sie | Korea Team | Ice hockey | 2018 Winter | |
| Jo Yeong-seok | South Korea | Alpine skiing | 1964 Winter | |
| Jo Yong-son | North Korea | Wrestling | 2000 Summer | |
| Jo Yong-suk | Shooting | 2008 Summer, 2012 Summer, 2016 Summer | |
| Jo Yun-mi | Football | 2012 Summer | |
| Jo Yun-sik | South Korea | Speed skating | 1956 Winter | |
| Alex Joachim | Saint Vincent and the Grenadines | Swimming | 2024 Summer | |
| Benoît Joachim | Luxembourg | Road cycling | 2004 Summer | |
| Izzy Shne Joachim | Saint Vincent and the Grenadines | Swimming | 2016 Summer | |
| John Joachim | United States | Rowing | 1904 Summer | |
| Mac Joachim | India | Boxing | 1948 Summer | |
| Michał Joachimowski | Poland | Athletics | 1972 Summer, 1976 Summer | |
| René Joannes-Powell | Belgium | 1920 Summer, 1928 Summer | |
| João Paulo | Brazil | Football | 1988 Summer | |
| Carolina João | Portugal | Sailing | 2020 Summer, 2024 Summer | |
| Anabela Joaquim | Angola | Handball | 1996 Summer | |
| Joaquín | Spain | Football | 1980 Summer | |
| Lucia Joas | Germany | Cross country skiing | 2014 Winter | |
| Brian Job | United States | Swimming | 1968 Summer, 1972 Summer | |
| Pavlína Jobánková | Czechoslovakia, Czech Republic | Canoe sprint | 1992 Summer, 1996 Summer | |
| Wiesław Jobczyk | Poland | Ice hockey | 1976 Winter, 1980 Winter, 1984 Winter | |
| Glen Jobe Jr. | United States | Biathlon | 1980 Winter | |
| Leisen Jobe | New Zealand | Field hockey | 2004 Summer | |
| Ousman Jobe | The Gambia | Swimming | 2024 Summer | |
| Ghazal El Jobeili | Lebanon | 2004 Summer | |
| Paul Jobert | France | Art competitions | 1928 Summer | |
| Jean Jobez | Cross country skiing | 1968 Winter, 1972 Winter | |
| Henri Jobier | Fencing | 1900 Summer, 1924 Summer | |
| Marcel Jobin | Canada | Athletics | 1976 Summer, 1984 Summer | |
| Yolande Jobin | Switzerland | Figure skating | 1952 Winter | |
| Juliet Jobling-Purser | Ireland | Equestrian eventing | 1968 Summer | |
| Anaso Jobodwana | South Africa | Athletics | 2012 Summer, 2016 Summer, 2020 Summer | |
| Glen Jobson | Australia | Field hockey | 1956 Summer | |
| Kate Jobson | Sweden | Swimming | 1956 Summer | |
| Rolf Jobst | East Germany | Rowing | 1972 Summer | |
| Wolfgang Jobst | Australia | Shooting | 1988 Summer | |
| Daniel Jocelyn | New Zealand | Equestrian eventing | 2004 Summer | |
| Erich Joch | Germany | Athletics | 1936 Summer | |
| Günter Jochems | Ice hockey | 1956 Winter | |
| Marleen Jochems | Netherlands | Field hockey | 2024 Summer | |
| Simon Jocher | Germany | Alpine skiing | 2022 Winter | |
| Al Jochim | United States | Artistic gymnastics | 1924 Summer, 1928 Summer, 1932 Summer, 1936 Summer | |
| Wolfgang Jöchl | Austria | Ice hockey | 1956 Winter | |
| Marian Jochman | Poland | Athletics | 1960 Summer | |
| Miroslav Jočić | Independent Olympians | Judo | 1992 Summer | |
| Charles Jock | United States | Athletics | 2016 Summer | |
| Célia Jodar | Morocco | Canoe slalom | 2020 Summer | |
| Jean-Philippe Jodard | France | Beach volleyball | 1996 Summer, 2000 Summer | |
| Kristina Joder | United States | Cross country skiing | 2002 Winter | |
| René Joder | France | Water polo | 1936 Summer | |
| Maciej Jodko | Poland | Snowboarding | 2010 Winter, 2014 Winter | |
| Sarah Jodoin Di Maria | Italy | Diving | 2020 Summer, 2024 Summer | |
| Florent Jodoin | Canada | Road cycling | 1948 Summer | |
| Joe Kyong-fan | South Korea | Swimming | 2000 Summer | |
| Pál Joensen | Denmark | 2012 Summer, 2016 Summer | |
| Jasmi Joensuu | Finland | Cross country skiing | 2022 Winter | |
| Joélcio Joerke | Brazil | Basketball | 1996 Summer | |
| Dirk Joestel | West Germany | Canoe sprint | 1988 Summer | |
| Stephanie Joffroy | Chile | Freestyle skiing | 2014 Winter, 2018 Winter | |
| Éder Jofre | Brazil | Boxing | 1956 Summer | |
| Rafael Jofresa | Spain | Basketball | 1992 Summer | |
| Tomás Jofresa | 1992 Summer | |
| Anna Lotta Jõgeva | Estonia | Alpine skiing | 2018 Winter | |
| Chris Jogis | United States | Badminton | 1992 Summer | |
| Marcela Joglová | Czech Republic | Athletics | 2020 Summer | |
| Nachhatar Singh Johal | India | Sailing | 2008 Summer | |
| Henrique Johann | Brazil | Rowing | 1980 Summer | |
| Helalia Johannes | Namibia | Athletics | 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Marine Johannès | France | Basketball | 2016 Summer, 2020 Summer, 2024 Summer | |
| Eric Johannesen | Germany | Rowing | 2012 Summer, 2016 Summer | |
| Frank Johannesen | Norway | Canoe sprint | 1984 Summer | |
| Johan Johannesen | Athletics | 1920 Summer | |
| Johannes Johannesen | Ice hockey | 2018 Winter | |
| Knut Johannesen | Speed skating | 1956 Winter, 1960 Winter, 1964 Winter | |
| Marie Skytte Hauberg Johannesen [ Wikidata ] | Denmark | Rowing | 2024 Summer | |
| Torben Johannesen | Germany | 2020 Summer, 2024 Summer | |
| Berit Johannessen | Norway | Cross country skiing | 1976 Winter | |
| Carl Erik Johannessen | Sailing | 1988 Summer | |
| Eirik Johannessen | 1964 Summer, 1968 Summer, 1972 Summer | |
| Henry Johannessen | Football | 1952 Summer | |
| Herman Horn Johannessen | Sailing | 1988 Summer, 1992 Summer, 1996 Summer, 2000 Summer | |
| Hjalmar Johannessen | Athletics | 1932 Summer, 1936 Summer | |
| Knut Erik Johannessen | Alpine skiing | 1980 Winter | |
| Kristian Krogh Johannessen | Golf | 2020 Summer | |
| Kurt Johannessen | Shooting | 1960 Summer | |
| Olaf Johannessen | 1924 Summer | |
| Otto Johannessen | Artistic gymnastics | 1920 Summer | |
| Sigurd Johannessen | 1908 Summer | |
| Sverre Johannessen | Alpine skiing | 1948 Winter, 1952 Winter | |
| Finn Johannesson | Sweden | Artistic gymnastics | 1968 Summer | |
| Konrad Johannesson | Canada | Ice hockey | 1920 Summer | |
| Patrekur Jóhannesson | Iceland | Handball | 1992 Summer | |
| Þröstur Jóhannesson | Cross country skiing | 1980 Winter | |
| André Bier Gerdau Johannpeter | Brazil | Equestrian jumping | 1988 Summer, 1996 Summer, 2000 Summer | |
| Christina Johannpeter | 1988 Summer | |
| Franz Johannsen | Germany | Canoe sprint | 1952 Summer, 1956 Summer | |
| Axel Johansson | Sweden | Speed skating | 1936 Winter | |
| Jim Johannson | United States | Ice hockey | 1988 Winter, 1992 Winter | |
| Guðmundur Jóhannsson | Iceland | Alpine skiing | 1984 Winter | |
| Haukur Jóhannsson | 1976 Winter | |
| Kristján Jóhannsson | Athletics | 1952 Summer | |
| Robert Johanny | Austria | Sailing | 1928 Summer | |
| Arne Johansen | Norway | Speed skating | 1952 Winter | |
| Berit Unn Johansen | Figure skating | 1964 Winter | |
| Bjørn Johansen | Ice hockey | 1968 Winter, 1972 Winter | |
| Brian Johansen | Denmark | Boxing | 1996 Summer | |
| Christian Johansen | Road cycling | 1920 Summer | |
| Christina Johansen | Rowing | 2020 Summer | |
| Daniel Johansen | Norway | Athletics | 1912 Summer | |
| Egil Johansen | Football | 1984 Summer | |
| Egil Borgen Johansen | Archery | 1972 Summer | |
| Egon Johansen | Denmark | Field hockey | 1948 Summer | |
| Eigil Johansen | Wrestling | 1952 Summer | |
| Erik Johansen | Sailing | 1968 Summer | |
| Erling Johansen | Weightlifting | 1972 Summer, 1976 Summer, 1980 Summer | |
| Eugen Johansen | Norway | Equestrian jumping, Equestrian eventing, Equestrian dressage | 1920 Summer, 1928 Summer, 1936 Summer | |
| Georg Johansen | Artistic gymnastics | 1952 Summer | |
| Gotfred Johansen | Denmark | Boxing | 1920 Summer | |
| Harald Johansen | Norway | Football | 1912 Summer | |
| Hendrik Johansen [ Wikidata ] | Denmark | Artistic gymnastics | 1908 Summer | |
| Henry Johansen | Norway | Football | 1936 Summer | |
| Hjalmar Peter Johansen | Denmark | Artistic gymnastics | 1912 Summer | |
| Ivar Johansen | Norway | Bobsleigh | 1948 Winter | |
| Jan Johansen | Canoe sprint | 1968 Summer, 1972 Summer | |
| Johan Anker Johansen | Artistic gymnastics | 1920 Summer | |
| John Johansen | Athletics | 1908 Summer | |
| John Christen Johansen | United States | Art competitions | 1928 Summer, 1932 Summer | |
| Jørgen Johansen | Denmark | Football | 1952 Summer | |
| Kari Mette Johansen | Norway | Handball | 2008 Summer, 2012 Summer | |
| Kjell Sverre Johansen | Rowing | 1972 Summer, 1976 Summer | |
| Kristian Johansen | Athletics | 1952 Summer | |
| Magne Johansen | Ski jumping | 1992 Winter | |
| Morten Johansen | Ice hockey | 1980 Winter | |
| Morten Nordeide Johansen | Luge | 1976 Winter | |
| Roy Johansen | Ice hockey | 1984 Winter, 1988 Winter, 1994 Winter | |
| Sara Johansen [ Wikidata ] | Denmark | Rowing | 2024 Summer | |
| Sheila Johansen | United States | Luge | 1968 Winter | |
| Sigleif Johansen | Norway | Biathlon | 1980 Winter | |
| Sigvart Johansen | Shooting | 1920 Summer | |
| Solfrid Johansen | Rowing | 1976 Summer, 1984 Summer | |
| Steinar Johansen | Speed skating | 1992 Winter, 1994 Winter, 1998 Winter | |
| Thorstein Johansen | Shooting | 1920 Summer | |
| Tom Johansen | Ice hockey | 1992 Winter, 1994 Winter | |
| Vibeke Johansen | Swimming | 1996 Summer | |
| Vidar Johansen | Ice hockey | 1980 Winter | |
| Vilde Johansen | Handball | 2020 Summer | |
| Vilhelm Johansen | Denmark | Shooting | 1936 Summer | |
| Evert Johanson | Norway | Boxing | 1948 Summer | |
| Sven Johanson | United States | Cross country skiing | 1960 Winter | |
| Thomas Johanson | Finland | Sailing | 1996 Summer, 2000 Summer, 2004 Summer | |
| Alfred Johansson | Sweden | Diving | 1912 Summer | |
| Allan Dahl Johansson | Norway | Speed skating | 2018 Winter, 2022 Winter | |
| Andreas Johansson | Sweden | Ice hockey | 1998 Winter | |
| Anita Johansson | Figure skating | 1972 Winter | |
| Anna-Maria Johansson | Handball | 2012 Summer | |
| Arne Johansson | Ice hockey | 1948 Winter | |
| Arne Johansson | Track cycling | 1952 Summer | |
| Axel Johansson | Rowing | 1912 Summer | |
| Axelina Johansson | Athletics | 2024 Summer | |
| Bengt Johansson | Wrestling | 1952 Summer, 1956 Summer | |
| Bengt Johansson | Handball | 1972 Summer | |
| Benny Johansson | 1972 Summer | |
| Bernt Johansson | Road cycling | 1972 Summer, 1976 Summer | |
| Birger Johansson | Finland | Canoe sprint | 1936 Summer | |
| Björn Johansson | Sweden | Road cycling | 1988 Summer, 1992 Summer | |
| Bo Johansson | Weightlifting | 1968 Summer | |
| Brita Johansson | Finland | Athletics | 1960 Summer | |
| Bror Johansson | Sailing | 1952 Summer | |
| Calle Johansson | Sweden | Ice hockey | 1998 Winter | |
| Camilla Johansson | Athletics | 2000 Summer | |
| Camilla Johansson | Swimming | 2000 Summer | |
| Carl-Emil Johansson | Tug of war | 1908 Summer | |
| Christer Johansson | Cross country skiing | 1976 Winter | |
| Claes Johanson | Wrestling | 1912 Summer, 1920 Summer, 1924 Summer | |
| Dan Johansson | Speed skating | 1976 Winter | |
| Denis Johansson | Finland | Athletics | 1948 Summer, 1952 Summer | |
| Elin Johansson | Sweden | Taekwondo | 2012 Summer, 2016 Summer | |
| Elis Johansson | Athletics | 1920 Summer | |
| Emil Johansson | Tug of war | 1908 Summer | |
| Emil Johansson | Boxing | 1928 Summer | |
| Emma Johansson | Road cycling | 2008 Summer, 2012 Summer, 2016 Summer | |
| Erica Johansson | Athletics | 2000 Summer | |
| Erik Johansson | Rowing | 1936 Summer | |
| Erik Johansson | Ice hockey | 1952 Winter | |
| Erik Johansson | Modern pentathlon | 2004 Summer | |
| Erkki Johansson | Finland | Wrestling | 1948 Summer | |
| Erland Johansson | Sweden | Shooting | 1984 Summer | |
| Ernst Johansson [ Wikidata ] | 1912 Summer | |
| Evert Johansson | Finland | Canoe sprint | 1936 Summer | |
| Fredrik Johansson | Sweden | Ski jumping | 1994 Winter | |
| Fritz Johansson | Wrestling | 1912 Summer | |
| Georg Johansson | Ice hockey | 1920 Summer | |
| Gerda Johansson | Diving | 1912 Summer | |
| Göran Johansson | Speed skating | 1972 Winter | |
| Göran Johansson | Rowing | 1980 Summer | |
| Göran Johansson | Speed skating | 1988 Winter | |
| Gösta Johansson | Ice hockey | 1952 Winter | |
| Greta Johansson | Diving, Swimming | 1912 Summer | |
| Gunnar Johansson | Canoe sprint | 1948 Summer | |
| Gunnar Johansson | Diving | 1952 Summer | |
| Gunnar Johansson | Water polo | 1980 Summer | |
| Gunnel Johansson | Artistic gymnastics | 1948 Summer | |
| Gustaf Johansson | Ice hockey | 1924 Winter, 1928 Winter | |
| Hans Johansson | Equestrian eventing | 1960 Summer | |
| Hans-Olof Johansson | Athletics | 1960 Summer | |
| Helge Johansson | Ice hockey | 1924 Winter | |
| Henna Johansson | Wrestling | 2012 Summer, 2016 Summer, 2020 Summer | |
| Henry Johansson | Ice hockey | 1928 Winter | |
| Hjalmar Johansson | Diving, Swimming | 1908 Summer, 1912 Summer | |
| Hugo Johansson | Shooting | 1912 Summer, 1920 Summer, 1924 Summer | |
| Hugo Johansson [ Wikidata ] | Wrestling | 1912 Summer | |
| Ingemar Johansson | Athletics | 1948 Summer | |
| Ingemar Johansson | Boxing | 1952 Summer | |
| Irma Johansson | Cross country skiing | 1956 Winter, 1960 Winter | |
| Irwi Johansson | Swimming | 1972 Summer | |
| Ivar Johansson | Wrestling | 1928 Summer, 1932 Summer, 1936 Summer | |
| Jan Johansson | Bobsleigh | 1972 Winter, 1976 Winter | |
| Jennie Johansson | Swimming | 2012 Summer, 2016 Summer | |
| Joachim Johansson | Tennis | 2004 Summer | |
| Jonatan Johansson | Snowboarding | 2006 Winter | |
| Kai Johansson | Finland | Swimming | 1992 Summer | |
| Kari Johansson | Ice hockey | 1968 Winter | |
| Karin Johansson | Sweden | Canoe sprint | 2012 Summer, 2016 Summer | |
| Karl-Erik Johansson | Finland | Rowing | 1952 Summer | |
| Kent-Olle Johansson | Sweden | Wrestling | 1984 Summer | |
| Knut Johansson | Tug of war | 1908 Summer | |
| Kurt Johansson | Shooting | 1948 Summer, 1960 Summer, 1968 Summer | |
| Lars Johansson | Sailing | 1976 Summer | |
| Lars Johansson | Ice hockey | 2022 Winter | |
| Leif Johansson | Bobsleigh | 1976 Winter | |
| Lennart Johansson | Ice hockey | 1964 Winter | |
| Leo Johansson | Cross country skiing | 2022 Winter | |
| Linnéa Johansson | Ice hockey | 2022 Winter | |
| Linus Johansson | 2022 Winter | |
| Lisa Johansson | 2018 Winter, 2022 Winter | |
| Liselotte Johansson | Freestyle skiing | 1994 Winter, 1998 Winter, 2002 Winter | |
| Magnus Johansson | Football | 1992 Summer | |
| Magnus Johansson | Ice hockey | 2010 Winter | |
| Maj-Britt Johansson | Archery | 1972 Summer | |
| Marcus Johansson | Ice hockey | 2014 Winter | |
| Märta Johansson | Diving | 1924 Summer | |
| Martin Johansson | Short track speed skating | 1994 Winter, 1998 Winter, 2002 Winter | |
| Mathias Johansson | Ice hockey | 2002 Winter | |
| Mats Johansson | Sailing | 1988 Summer, 2000 Summer | |
| Mats Johansson | Freestyle skiing | 1994 Winter | |
| Mauritz Johansson | Shooting | 1924 Summer | |
| Mikael Johansson | Ice hockey | 1988 Winter, 1992 Winter | |
| Nils Johansson | 1928 Winter | |
| Nils Johansson | Road cycling | 1948 Summer | |
| Nils Johansson | Ice hockey | 1964 Winter, 1968 Winter | |
| Olle Johansson | Swimming, Water polo | 1948 Summer, 1952 Summer | |
| Olle Johansson | Sailing | 1976 Summer | |
| Oskar Johansson | Canada | 2004 Summer, 2008 Summer | |
| Osvald Johansson | Sweden | Road cycling | 1960 Summer | |
| Ove Johansson | Weightlifting | 1968 Summer, 1972 Summer | |
| Paavo Johansson | Finland | Athletics | 1920 Summer, 1924 Summer | |
| Patrik Johansson | Sweden | Volleyball | 1988 Summer | |
| Per Johansson | Swimming | 1980 Summer, 1984 Summer, 1988 Summer | |
| Peter Johansson | Figure skating | 1988 Winter | |
| Reginald Johansson | New Zealand | Field hockey | 1956 Summer | |
| Richard Johansson | Sweden | Figure skating | 1908 Summer | |
| Robert Johansson | Norway | Ski jumping | 2018 Winter, 2022 Winter | |
| Roger Johansson | Sweden | Ice hockey | 1994 Winter | |
| Roland Johansson | Swimming | 1928 Summer | |
| Roland Johansson | Boxing | 1952 Summer | |
| Rolf Johansson [ Wikidata ] | Wrestling | 1952 Summer | |
| Rudolf Johansson | Athletics | 1924 Summer | |
| Rune Johansson | Ice hockey | 1948 Winter, 1952 Winter | |
| Sara Johansson | Football | 2000 Summer | |
| Selfrid Johansson | Boxing | 1928 Summer | |
| Sixten Johansson | Ski jumping | 1936 Winter | |
| Stefan Johansson | Athletics | 1988 Summer, 1992 Summer | |
| Stig Johansson | Water polo | 1952 Summer | |
| Stig-Göran Johansson | Ice hockey | 1972 Winter | |
| Svante Johansson | Diving | 1948 Summer | |
| Sven Johansson | Canoe sprint | 1936 Summer | |
| Sven Johansson | Road cycling | 1936 Summer | |
| Sven Johansson | Shooting | 1968 Summer, 1972 Summer, 1976 Summer, 1980 Summer | |
| Sven-Bertil Johansson | Sailing | 1976 Summer | |
| Sven-Göran Johansson | Swimming | 1960 Summer | |
| Thomas Johansson | Tennis | 2000 Summer, 2008 Summer | |
| Thorsten Johansson | Athletics | 1976 Summer | |
| Thure Johansson | Wrestling | 1948 Summer | |
| Tomas Johansson | 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer | |
| Tomas Johansson | Badminton | 1996 Summer, 2000 Summer | |
| Tomas Johansson | Shooting | 2000 Summer | |
| Tomas Johansson | Snowboarding | 2002 Winter | |
| Tommy Johansson | Athletics, Bobsleigh | 1984 Summer, 1984 Winter | |
| Tore Johansson | Rowing | 1952 Summer | |
| Torsten Johansson | Football | 1936 Summer | |
| Ulf Johansson | Biathlon | 1992 Winter, 1994 Winter | |
| Victor Johansson | Swimming | 2020 Summer, 2024 Summer | |
| Vidar Johansson | Athletics | 2020 Summer | |
| Viljam Johansson [ Wikidata ] | Finland | 1912 Summer | |
| Signe Johansson-Engdahl | Sweden | Diving | 1924 Summer | |
| Fawaz Ismail Johar | Bahrain | Athletics | 1996 Summer | |
| Juma Salem Johar | Qatar | Football | 1992 Summer | |
| Therese Johaug | Norway | Cross country skiing | 2010 Winter, 2014 Winter, 2022 Winter | |
| Georges Johin | France | Croquet | 1900 Summer | |
| Kenji Johjima | Japan | Baseball | 2004 Summer | |
| Yogi Johl | Canada | Wrestling | 1996 Summer | |
| Alexander John | Germany | Athletics | 2012 Summer, 2016 Summer | |
| Assan John | The Gambia | 1996 Summer | |
| Bedřich John | Czechoslovakia | Equestrian eventing | 1924 Summer | |
| Franziska John | Germany | Canoe sprint | 2012 Summer, 2016 Summer | |
| Heike John | West Germany | Swimming | 1976 Summer | |
| Hinrich John | Germany, West Germany | Athletics | 1964 Summer, 1968 Summer | |
| Jason John | Great Britain | 1992 Summer | |
| Max John [ Wikidata ] | Germany | Rowing | 2024 Summer | |
| Sabine John | East Germany | Athletics | 1988 Summer | |
| Shakeel John [ Wikidata ] | Trinidad and Tobago | Bobsleigh | 2022 Winter | |
| Yemi Mary John | Great Britain | Athletics | 2024 Summer | |
| Axel Jöhncke | Sweden | Fencing | 1912 Summer | |
| Louise Jöhncke | Swimming | 1996 Summer, 2000 Summer | |
| Torsten Jöhncke | Ice hockey | 1936 Winter | |
| Gerda Johner | Switzerland | Figure skating | 1964 Winter | |
| Mélody Johner | Equestrian eventing | 2020 Summer, 2024 Summer | |
| Rüdi Johner | Figure skating | 1964 Winter | |
| Andrew Johns | Great Britain | Triathlon | 2000 Summer, 2004 Summer | |
| Brian Johns | Canada | Swimming | 2000 Summer, 2004 Summer, 2008 Summer | |
| Helen Johns | United States | 1932 Summer | |
| Martin Johns | New Zealand | Athletics | 1996 Summer | |
| Bjarne Johnsen | Norway | Artistic gymnastics | 1912 Summer | |
| Erik Johnsen | Ski jumping | 1988 Winter | |
| Robert Johnsen | Denmark | Artistic gymnastics | 1920 Summer | |
| Jarl Johnsen | Norway | Boxing | 1936 Summer | |
| Johan Johnsen | Athletics | 1920 Summer | |
| John Johnsen | Swimming | 1912 Summer | |
| John Johnsen | Football | 1920 Summer | |
| Lars Kristian Johnsen | Road cycling | 1992 Summer | |
| Per Johnsen | Canoe sprint | 1952 Summer | |
| Sjur Johnsen | Wrestling | 1920 Summer | |
| Tore Johnsen | Athletics | 1984 Summer | |
| Vibeke Johnsen | Handball | 1988 Summer | |
| Debbie Johnsey | Great Britain | Equestrian jumping | 1976 Summer | |
| Knute Johnsgaard | Canada | Cross country skiing | 2018 Winter | |
| Shawn Johnson East | United States | Artistic gymnastics | 2008 Summer | |
| Jenny Johnson Jordan | Beach volleyball | 2000 Summer | |
| Johnson | Football | 1904 Summer | |
| Alaysha Johnson | Athletics | 2024 Summer | |
| Albert Johnson | Canada | Football | 1904 Summer | |
| Albert Johnson | United States | Athletics | 1904 Summer | |
| Albert Johnson | Great Britain | 1956 Summer, 1960 Summer | |
| Alexander Johnson | Australia | Modern pentathlon | 1996 Summer | |
| Allen Johnson | United States | Athletics | 1996 Summer, 2000 Summer, 2004 Summer | |
| Allyn Johnson | Shooting | 1984 Summer | |
| Anders Johnsson | Sweden | 1920 Summer | |
| Anders Johnson | United States | Ski jumping | 2006 Winter, 2010 Winter, 2014 Winter | |
| Andrew Johnson | Cross country skiing | 2002 Winter, 2006 Winter | |
| Angela Johnson | Canada | Basketball | 1976 Summer | |
| Ann Johnson | Great Britain | Athletics | 1952 Summer | |
| Annette Johnson | New Zealand | Alpine skiing | 1952 Winter | |
| Arthur Johnson | Canada | Canoe sprint | 1952 Summer | |
| Arthur Johnson | United States | Boxing | 1988 Summer | |
| Ashleigh Johnson | Water polo | 2016 Summer, 2020 Summer, 2024 Summer | |
| Barbara Johnson | Ireland | Athletics | 1988 Summer | |
| Barry Johnson | Australia | Judo | 1972 Summer | |
| Ben Johnson | Canada | Athletics | 1984 Summer, 1988 Summer, 1992 Summer | |
| Ben Johnson | Ireland | Field hockey | 2024 Summer | |
| Bill Johnson | United States | Alpine skiing | 1984 Winter | |
| Brandy Johnson | Artistic gymnastics | 1988 Summer | |
| Breezy Johnson | Alpine skiing | 2018 Winter | |
| Brian Johnson | Athletics | 2008 Summer | |
| Bryant Johnson | Handball | 1988 Summer | |
| Butch Johnson | Archery | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer | |
| C. William Johnson | Skeleton | 1948 Winter | |
| Cari Johnson | Canada | Shooting | 2000 Summer | |
| Carl Johnson | United States | Athletics | 1920 Summer | |
| Carl Johnson | Football | 1924 Summer | |
| Carrie Johnson | Canoe sprint | 2004 Summer, 2008 Summer, 2012 Summer | |
| Charles Johnson | Great Britain | Diving | 1948 Summer | |
| Charles Johnson | United States | Baseball | 1992 Summer | |
| Charley Johnson | Wrestling | 1920 Summer | |
| Cheswill Johnson | South Africa | Athletics | 2020 Summer, 2024 Summer | |
| Chris Johnson | Canada | Boxing | 1992 Summer | |
| Cornelius Johnson | United States | Athletics | 1932 Summer, 1936 Summer | |
| Courtney Johnson | Water polo | 2000 Summer | |
| Craig Johnson | Ice hockey | 1994 Winter | |
| Curtis Johnson | Athletics | 2000 Summer | |
| Dave Johnson | 1988 Summer, 1992 Summer | |
| David Johnson | Canada | 1924 Summer | |
| David Johnson | United States | Swimming | 1968 Summer | |
| David Johnson | Canada | Rowing | 1984 Summer, 1988 Summer | |
| David Johnson | United States | Shooting | 1992 Summer | |
| Delante Johnson | Boxing | 2020 Summer | |
| Dennis Johnson | West Indies Federation, Jamaica | Athletics | 1960 Summer, 1964 Summer | |
| Derek Johnson | Great Britain | 1956 Summer | |
| Dick Johnson | Virgin Islands | Sailing | 1976 Summer | |
| Dominic Johnson | Saint Lucia | Athletics | 1996 Summer, 2000 Summer, 2008 Summer | |
| Don Johnson | United States | Cross country skiing, Nordic combined | 1948 Winter | |
| Earl Johnson | Athletics | 1920 Summer, 1924 Summer | |
| Eddie Johnson | Boxing | 1948 Summer | |
| Edgar Johnson | Rowing | 1932 Summer | |
| Emma Johnson | Australia | Swimming | 1996 Summer | |
| Erik Johnson | United States | Ice hockey | 2010 Winter | |
| Ernest Johnson | Great Britain | Track cycling | 1932 Summer, 1936 Summer | |
| Ethel Johnson | Athletics | 1932 Summer | |
| Felisha Johnson | United States | 2016 Summer | |
| Fiona Johnson | New Zealand | Alpine skiing | 1980 Winter | |
| Folke Johnson | Sweden | Sailing | 1912 Summer | |
| Francis Johnson | United States | Basketball | 1936 Summer | |
| Gail Johnson | Canada | Sailing | 1988 Summer | |
| Gea Johnson | United States | Bobsleigh | 2002 Winter | |
| George Johnson | Puerto Rico | Shooting | 1948 Summer | |
| George Johnson | Liberia | Athletics | 1956 Summer, 1960 Summer | |
| Gordon Johnson | Australia | Track cycling | 1964 Summer, 1968 Summer | |
| Graham Johnson | Canoe sprint | 1972 Summer | |
| Greg Johnson | Canada | Ice hockey | 1994 Winter | |
| Gunnar Johnson | Sweden | Athletics | 1912 Summer | |
| Haley Johnson | United States | Biathlon | 2010 Winter | |
| Harry Johnson | Great Britain | Boxing | 1908 Summer | |
| Hattie Johnson | United States | Shooting | 2004 Summer | |
| Hugo Johnson | Sweden | Sailing | 1948 Summer | |
| Ian Johnson | Great Britain | Water polo | 1948 Summer, 1952 Summer | |
| Jack Johnson | United States | Shooting | 1972 Summer | |
| Jack Johnson | Ice hockey | 2010 Winter | |
| Jackie Johnson | Athletics | 2008 Summer | |
| Jade Johnson | Great Britain | 2004 Summer, 2008 Summer | |
| James Johnson | United States | Wrestling | 1976 Summer | |
| James H. Johnson | Great Britain | Figure skating | 1908 Summer | |
| Jan Johnson | United States | Athletics | 1972 Summer | |
| Jenna Johnson | Swimming | 1984 Summer | |
| Jill Johnson | 1992 Summer | |
| Jinson Johnson | India | Athletics | 2016 Summer | |
| Jonathan Johnson | United States | 2004 Summer | |
| Joseph Johnson | Malaysia | Field hockey | 1968 Summer | |
| Jørn Johnson | Norway | Boxing | 1996 Summer | |
| Karen Johnson | Canada | Sailing | 1988 Summer | |
| Karl Johnson | Sweden | Wrestling | 1912 Summer | |
| Kate Johnson | United States | Rowing | 2004 Summer | |
| Kathryn Johnson | Canada | Field hockey | 1988 Summer | |
| Kathryn Johnson | Great Britain | 1992 Summer, 1996 Summer, 2000 Summer | |
| Kathryn Johnson | United States | Rugby sevens | 2016 Summer | |
| Kathy Johnson | Artistic gymnastics | 1984 Summer | |
| Keith Johnson | Singapore | Sailing | 1956 Summer | |
| Keldon Johnson | United States | Basketball | 2020 Summer | |
| Kelly Johnson | Canada | Figure skating | 1984 Winter | |
| Ken Johnson | Great Britain | Athletics | 1952 Summer | |
| Ken Johnson | United States | Shooting | 2000 Summer | |
| Kent Johnson | Canada | Ice hockey | 2022 Winter | |
| Kerry Johnson | Australia | Athletics | 1988 Summer, 1992 Summer | |
| Kevin Johnson | Bahamas | 1968 Summer, 1972 Summer | |
| Kevin Johnson [ Wikidata ] | South Africa | Baseball | 2000 Summer | |
| Kibwé Johnson | United States | Athletics | 2012 Summer, 2016 Summer | |
| Kirk Johnson | Canada | Boxing | 1992 Summer | |
| Kyle Johnson | Great Britain | Basketball | 2012 Summer | |
| Laurel Johnson | Jamaica | Athletics | 1988 Summer | |
| Lawrence Johnson | United States | 1996 Summer, 2000 Summer | |
| Léon Johnson | France | Shooting | 1908 Summer, 1912 Summer, 1920 Summer | |
| Louis Johnson | United States | Boxing | 1964 Summer | |
| Magic Johnson | Basketball | 1992 Summer | |
| Manne Johnson | Sweden | Shooting | 1980 Summer | |
| Margaret Johnson | Australia | Athletics | 1956 Summer | |
| Mark Johnson | United States | Ice hockey | 1980 Winter | |
| Marvin Johnson | Boxing | 1972 Summer | |
| Michael Johnson | Canoe sprint | 1976 Summer | |
| Michael Johnson | Athletics | 1992 Summer, 1996 Summer, 2000 Summer | |
| Michael Johnson | Great Britain | Field hockey | 2000 Summer, 2004 Summer | |
| Mickey Johnson | Bermuda | Diving | 1952 Summer | |
| Mike Johnson | Canada | Baseball | 2004 Summer, 2008 Summer | |
| Moesha Johnson | Australia | Marathon swimming, Swimming | 2024 Summer | |
| Nancy Johnson | United States | Shooting | 1996 Summer, 2000 Summer | |
| Nathan Johnson | Canoe sprint | 2004 Summer | |
| Nigel Johnson | Great Britain | Swimming | 1972 Summer | |
| Nikki Johnson | Canada | Basketball | 2000 Summer | |
| Pamela Johnson | Great Britain | Swimming | 1964 Summer | |
| Patrick Johnson | Australia | Athletics | 2000 Summer, 2004 Summer | |
| Patterson Johnson | Bahamas | 1988 Summer | |
| Paul Johnson | United States | Ice hockey | 1960 Winter, 1964 Winter | |
| Perry Johnson | Bermuda | Athletics | 1948 Summer | |
| Phyllis Johnson | Great Britain | Figure skating | 1908 Summer, 1920 Summer | |
| Pitch Johnson | United States | Athletics | 1924 Summer | |
| Rafer Johnson | 1956 Summer, 1960 Summer | |
| Ralph Johnson | Great Britain | Fencing | 1968 Summer, 1972 Summer, 1976 Summer, 1984 Summer | |
| Ridgely Johnson | United States | Rowing | 1984 Summer | |
| Robert Johnson | Canada | Handball | 1976 Summer | |
| Robyn Johnson | South Africa | Field hockey | 2020 Summer | |
| Rodney Johnson | Australia | Shooting | 1956 Summer, 1960 Summer, 1964 Summer | |
| Roger Johnson | New Zealand | Athletics | 1968 Summer, 1972 Summer | |
| Ronny Johnson | Australia | Baseball | 2000 Summer | |
| Roy Johnson | Bermuda | Boxing | 1972 Summer | |
| Russell Johnson | Virgin Islands | Shooting | 1976 Summer | |
| Ryan Johnson | Canada | Freestyle skiing | 1998 Winter, 2002 Winter | |
| Scott Johnson | United States | Artistic gymnastics | 1984 Summer, 1988 Summer | |
| Seba Johnson | Virgin Islands | Alpine skiing | 1988 Winter, 1992 Winter | |
| Shannon Johnson | United States | Basketball | 2004 Summer | |
| Sheryl Johnson | Field hockey | 1984 Summer, 1988 Summer | |
| Sidney Johnson | Tug of war | 1904 Summer | |
| Sonja Johnson | Australia | Equestrian eventing | 2008 Summer | |
| Steele Johnson | United States | Diving | 2016 Summer | |
| Stein Johnson | Norway | Athletics | 1948 Summer, 1952 Summer | |
| Steve Johnson | United States | Tennis | 2016 Summer | |
| Steven Johnson | Great Britain | Field hockey | 1956 Summer | |
| Stone Johnson | United States | Athletics | 1960 Summer | |
| Susan Johnson | Swimming | 1988 Summer | |
| Sven Johnson | Sweden | Artistic gymnastics | 1920 Summer | |
| Tage Johnson | Rowing | 1912 Summer | |
| Tassy Johnson | Australia | Road cycling, Track cycling | 1936 Summer | |
| Tebbs Lloyd Johnson | Great Britain | Athletics | 1936 Summer, 1948 Summer | |
| Ted Johnson | New Zealand | Rowing | 1952 Summer | |
| Tess Johnson | United States | Freestyle skiing | 2018 Winter | |
| Thomas Johnson | Great Britain | Track cycling | 1908 Summer, 1920 Summer | |
| Tony Johnson | United States | Rowing | 1964 Summer, 1968 Summer | |
| Tureano Johnson | Bahamas | Boxing | 2008 Summer | |
| Victor Johnson | Great Britain | Track cycling | 1908 Summer | |
| Wayne Johnson | United States | Athletics | 1924 Summer | |
| Wesley Momo Johnson | Liberia | 1964 Summer | |
| Wilfrid Johnson | Great Britain | Lacrosse | 1908 Summer | |
| William Johnson | United States | Wrestling | 1924 Summer | |
| William Johnson | Swimming | 1968 Summer | |
| William Johnson | Handball | 1976 Summer | |
| Yngve Johnson | Sweden | Diving | 1920 Summer | |
| Yudel Johnson | Cuba | Boxing | 2004 Summer | |
| Linda Johnson-Blair | Canada | Speed skating | 1994 Winter, 1998 Winter | |
| Katarina Johnson-Thompson | Great Britain | Athletics | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Bo Johnsson | Sweden | Swimming | 1924 Summer | |
| Georg Johnsson | Road cycling | 1928 Summer | |
| Kim Johnsson | Ice hockey | 2002 Winter | |
| Rolf Johnsson | Artistic gymnastics | 1908 Summer | |
| Rune Johnsson | Wrestling | 1964 Summer | |
| Sonja Johnsson | Swimming | 1912 Summer | |
| Thomas Johnsson | 1968 Summer | |
| Abigail Johnston | United States | Diving | 2012 Summer, 2016 Summer | |
| Ann Johnston | Canada | Figure skating | 1956 Winter | |
| Atina Ford | Curling | 1998 Winter | |
| Brian Johnston | New Zealand | Field hockey | 1956 Summer | |
| Cameron Johnston | Australia | Wrestling | 2000 Summer | |
| Charles Johnston | Great Britain | Athletics | 1924 Summer | |
| Christine Johnston | Sailing | 2000 Summer | |
| Clarissa Johnston | South Africa | Artistic swimming | 2020 Summer | |
| Cynthia Johnston | Canada | Basketball | 1996 Summer | |
| David Johnston | United States | Swimming | 2024 Summer | |
| Don Johnston | South Africa | 1948 Summer | |
| Donald Johnston | United States | Rowing | 1920 Summer | |
| Eric Johnston | Australia | Water polo | 1948 Summer | |
| Fiona Johnston | Great Britain | Rowing | 1988 Summer | |
| Gordon Johnston | Canada | Field hockey | 2016 Summer, 2020 Summer | |
| Graham Johnston | South Africa | Swimming | 1952 Summer | |
| Greg Johnston | New Zealand | Rowing | 1984 Summer, 1988 Summer | |
| Herbert Johnston | Great Britain | Athletics | 1924 Summer, 1928 Summer | |
| Ian Johnston | Australia | Rowing | 1960 Summer | |
| Ian Johnston | Canada | Field hockey | 1964 Summer | |
| Karl Johnston | Great Britain | Bobsleigh | 2006 Winter | |
| Kenneth Johnston | Zimbabwe | Shooting | 1988 Summer | |
| Lee Johnston | Great Britain | Bobsleigh | 1998 Winter, 2002 Winter, 2006 Winter | |
| Lyndon Johnston | Canada | Figure skating | 1984 Winter, 1988 Winter | |
| Mark Johnston | Swimming | 2000 Summer, 2004 Summer | |
| Marshall Johnston | Ice hockey | 1964 Winter, 1968 Winter | |
| Naazmi Johnston | Australia | Rhythmic gymnastics | 2008 Summer | |
| Oswaldo Johnston | Guatemala | Wrestling | 1952 Summer | |
| Rebecca Johnston | Canada | Ice hockey | 2010 Winter, 2014 Winter, 2018 Winter, 2022 Winter | |
| Ritchie Johnston | New Zealand | Track cycling | 1956 Summer | |
| Robbie Johnston | Athletics | 1992 Summer, 1996 Summer | |
| Tim Johnston | Great Britain | 1968 Summer | |
| Verna Johnston | Australia | 1952 Summer | |
| Warren Johnston | New Zealand | Track cycling | 1956 Summer | |
| Albert Johnstone [ Wikidata ] | South Africa | Shooting | 1912 Summer | |
| Banner Johnstone | Great Britain | Rowing | 1908 Summer | |
| Clarke Johnstone | New Zealand | Equestrian eventing | 2016 Summer, 2024 Summer | |
| Colin Johnstone | Rowing | 1952 Summer, 1956 Summer | |
| Dick Johnstone | Road cycling | 1964 Summer | |
| Donald Johnstone | Canoe slalom | 1992 Summer | |
| Faye Johnstone | Archery | 1992 Summer | |
| Hans Johnstone | United States | Nordic combined | 1988 Winter | |
| John Johnstone | Athletics | 1912 Summer | |
| Lorna Johnstone | Great Britain | Equestrian dressage | 1956 Summer, 1968 Summer, 1972 Summer | |
| Nathan Johnstone | Australia | Snowboarding | 2014 Winter, 2018 Winter | |
| Robin Johnstone | Great Britain | Rowing | 1920 Summer | |
| Russell Johnstone [ Wikidata ] | Australia | Equestrian jumping | 1996 Summer | |
| Teimoc Johnston-Ono | United States | Judo | 1976 Summer | |
| Mayookha Johny | India | Athletics | 2012 Summer | |
| Stephan Joho | Switzerland | Track cycling | 1984 Summer | |
| Stéphane Joinau | France | Field hockey | 1968 Summer | |
| Jean Joire | Art competitions | 1928 Summer | |
| Peter Jok | South Sudan | Basketball | 2024 Summer | |
| Rajko Jokanović | Serbia and Montenegro | Volleyball | 1996 Summer | |
| Jaroslav Jokeľ | Czechoslovakia, Slovakia | Weightlifting | 1992 Summer, 1996 Summer | |
| Đorđe Jokić | Serbia and Montenegro | Football | 2004 Summer | |
| Nikola Jokić | Serbia | Basketball | 2016 Summer, 2024 Summer | |
| Predrag Jokić | Serbia and Montenegro, Montenegro | Water polo | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Anita Jokiel | Poland | Artistic gymnastics | 1980 Summer | |
| Jerzy Jokiel | 1952 Summer, 1960 Summer | |
| Aimo Jokinen | Finland | Track cycling | 1952 Summer | |
| August Jokinen [ Wikidata ] | Wrestling | 1912 Summer | |
| Esa Jokinen | Athletics | 1980 Summer | |
| Jouko Jokinen | Speed skating | 1960 Winter, 1964 Winter | |
| Jussi Jokinen | Ice hockey | 2006 Winter, 2014 Winter | |
| Matti Jokinen | Sailing | 1976 Summer | |
| Olli Jokinen | Ice hockey | 2002 Winter, 2006 Winter, 2010 Winter, 2014 Winter | |
| Valtteri Jokinen | Judo | 2012 Summer | |
| Celia Jokisch | El Salvador | Swimming | 1968 Summer | |
| Friedrich Jokisch | 1968 Summer | |
| Maro Joković | Croatia | Water polo | 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Anton Joksch | Germany | Track cycling | 1928 Summer | |
| Siegfried Joksch | Austria | Football | 1948 Summer | |
| Guillaume Joli | France | Handball | 2012 Summer | |
| Barnabe Jolicoeur | Mauritius | Athletics | 1996 Summer | |
| Wouter Jolie | Netherlands | Field hockey | 2012 Summer | |
| Ernst Joll | Estonia | Football | 1924 Summer | |
| Ivan Joller | Switzerland | Biathlon | 2014 Winter | |
| Wibout Jolles | Netherlands | Shooting | 1980 Summer | |
| Pierre-Didier Jollien | Switzerland | Wrestling | 1988 Summer | |
| Jolliet [ Wikidata ] | France | Fencing | 1900 Summer | |
| Allison Jolly | United States | Sailing | 1988 Summer | |
| Brian Jolly | Great Britain | Road cycling | 1968 Summer | |
| Marny Jolly | Malaysia | Swimming | 1964 Summer | |
| Robert Jolly [ Wikidata ] | Great Britain | Track cycling | 1908 Summer | |
| Maria Inês Jololo | Angola | Handball | 2000 Summer, 2004 Summer | |
| Audrey Joly | Canada | Artistic swimming | 2020 Summer | |
| Damien Joly | France | Swimming | 2012 Summer, 2016 Summer, 2024 Summer | |
| Pascal Jolyot | Fencing | 1980 Summer, 1984 Summer | |
| Supak Jomkoh | Thailand | Badminton | 2024 Summer | |
| Jon Chol-ho | North Korea | Weightlifting | 1992 Summer, 1996 Summer, 2000 Summer | |
| Jon Hyon-ju | Diving | 2004 Summer | |
| Jon Kyong-hui | Athletics | 2012 Summer | |
| Jon Myong-hui | Football | 2008 Summer | |
| Jon Myong-hwa | 2012 Summer | |
| Václav Jón | Czechoslovakia | Cross country skiing | 1924 Winter | |
| Modupe Jonah | Sierra Leone | Athletics | 1988 Summer | |
| Dusty Jonas | United States | 2008 Summer | |
| Ildikó Jónás | Hungary | 1960 Summer | |
| Jonas Jonas | Namibia | Boxing | 2016 Summer, 2020 Summer | |
| Lucien Jonas | France | Art competitions | 1932 Summer | |
| Natasha Jonas | Great Britain | Boxing | 2012 Summer | |
| Peter Jonas | Austria | Figure skating | 1960 Winter, 1964 Winter | |
| Kenneth Jonassen | Denmark | Badminton | 2000 Summer, 2004 Summer, 2008 Summer | |
| Gunnlaugur Jónasson | Iceland | Sailing | 1984 Summer, 1988 Summer | |
| Johan Jonasson | Sweden | Artistic gymnastics | 1984 Summer, 1988 Summer, 1992 Summer | |
| Júlíus Jónasson | Iceland | Handball | 1992 Summer | |
| Sven Jonasson | Sweden | Football | 1936 Summer | |
| Arthur Jonath | Germany | Athletics | 1932 Summer | |
| Lotte Jonathans | Netherlands | Badminton | 2000 Summer, 2004 Summer | |
| Wadeline Jonathas | United States | Athletics | 2020 Summer | |
| Theunis Jonck | South Africa | Weightlifting | 1952 Summer | |
| Magnus Jøndal | Norway | Handball | 2020 Summer | |
| Anders Jonell | Sweden | Freestyle skiing | 1994 Winter | |
| Cecil Jones Attuquayefio | Ghana | Football | 1968 Summer | |
| Marion Jones Farquhar | United States | Tennis | 1900 Summer | |
| Aislin Jones | Australia | Shooting | 2016 Summer, 2024 Summer | |
| Akela Jones | Barbados | Athletics | 2016 Summer | |
| Alan Jones | Great Britain | Bobsleigh | 1972 Winter | |
| Alfonso Jones | Mexico | Archery | 1972 Summer | |
| Alfred Jones | United States | Boxing | 1968 Summer | |
| Alice Jones | Australia | Alpine skiing | 2002 Winter | |
| Andres Jones | Great Britain | Athletics | 2000 Summer | |
| Ann Jones | Australia | Diving | 1972 Summer | |
| Anthony Jones | Barbados | Athletics | 1984 Summer | |
| Arianne Jones | Canada | Luge | 2014 Winter | |
| Arthur Jones | Great Britain | Athletics | 1968 Summer | |
| Asjha Jones | United States | Basketball | 2012 Summer | |
| Barbara Jones | Athletics | 1952 Summer, 1960 Summer | |
| Barbara Jones | Cross country skiing | 2002 Winter | |
| Benjamin Jones | Great Britain | Track cycling | 1908 Summer | |
| Beverly Jones | Rowing | 1980 Summer | |
| Bill Jones | Speed skating | 1952 Winter | |
| Bobby Jones | United States | Basketball | 1972 Summer | |
| Brandon Jones | Belize | Athletics | 2016 Summer | |
| Brenda Jones | Australia | 1960 Summer | |
| Brian Jones | New Zealand | Sailing | 1992 Summer, 1996 Summer | |
| Brianna Jones [ Wikidata ] | Puerto Rico | Basketball | 2024 Summer | |
| Burke Jones | United States | Football | 1924 Summer | |
| Burwell Jones | Swimming | 1952 Summer | |
| Candace Jones | Canada | Figure skating | 1976 Winter | |
| Carlik Jones | South Sudan | Basketball | 2024 Summer | |
| Christina Jones | United States | Artistic swimming | 2008 Summer | |
| Christopher Jones | Great Britain | Water polo | 1920 Summer | |
| Clint Jones | United States | Ski jumping | 2002 Winter, 2006 Winter | |
| Cobi Jones | Football | 1992 Summer | |
| Colin Jones | Great Britain | Boxing | 1976 Summer | |
| Craig Jones | Australia | Rowing | 2004 Summer | |
| Cullen Jones | United States | Swimming | 2008 Summer, 2012 Summer | |
| Dale Jones | Antigua and Barbuda | Athletics | 1984 Summer, 1988 Summer, 1992 Summer | |
| Dave Jones | Canada | Volleyball | 1984 Summer | |
| David Jones | Great Britain | Athletics | 1960 Summer | |
| David Jones | Virgin Islands | Sailing | 1972 Summer | |
| David Jones | Australia | Shooting | 2000 Summer | |
| Deacon Jones | United States | Athletics | 1956 Summer, 1960 Summer | |
| Debbie Jones | Bermuda | 1976 Summer | |
| Denise Jones | Great Britain | Artistic gymnastics | 1980 Summer | |
| Dwight Jones | United States | Basketball | 1972 Summer | |
| E. J. Jones [ Wikidata ] | Great Britain | Rugby | 1908 Summer | |
| Earl Jones | United States | Athletics | 1984 Summer | |
| Edgecomb Lee Jones [ Wikidata ] | Golf | 1904 Summer | |
| Edward Jones | Great Britain | Lacrosse | 1908 Summer | |
| Elliott Jones | United States | Shooting | 1936 Summer | |
| Esther Jones | Athletics | 1992 Summer | |
| Evan Thomas Jones [ Wikidata ] | Great Britain | Swimming | 1900 Summer | |
| Frank Jones Jr. | United States | Luge | 1972 Winter | |
| Frankie Jones | Great Britain | Rhythmic gymnastics | 2012 Summer | |
| Garfield Jones | Jamaica | Table tennis | 1988 Summer | |
| Garry Jones | Australia | Road cycling, Track cycling | 1960 Summer | |
| Gemma Jones | New Zealand | Sailing | 2016 Summer | |
| George Jones | Great Britain | Shooting | 1948 Summer | |
| Georgina Jones | United States | Tennis | 1900 Summer | |
| Glyn Jones | Great Britain | Figure skating | 1976 Winter | |
| Gowan Jones | South Africa | Field hockey | 2024 Summer | |
| Greg Jones | United States | Alpine skiing | 1976 Winter | |
| Gwyn Jones | South Africa | Figure skating | 1960 Winter | |
| Harriet Jones | Great Britain | Swimming | 2020 Summer | |
| Harry Jones | Canada | Sailing | 1932 Summer | |
| Harry Jones | Rugby sevens | 2020 Summer | |
| Hayes Jones | United States | Athletics | 1960 Summer, 1964 Summer | |
| Heather Jones | Canada | Field hockey | 1992 Summer | |
| Howland Jones | United States | Art competitions | 1932 Summer | |
| Hugh Jones | Tennis | 1904 Summer | |
| Hugh Jones | New Zealand | Weightlifting | 1956 Summer | |
| Hugh Jones | Great Britain | Athletics | 1984 Summer | |
| Ian Jones | Field hockey | 1960 Summer, 1964 Summer | |
| J. W. Jones [ Wikidata ] | Artistic gymnastics | 1908 Summer | |
| Jacque Jones | United States | Baseball | 1996 Summer | |
| Jade Jones | Great Britain | Taekwondo | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| James Jones | Football | 1900 Summer | |
| James Jones | Canada | Shooting | 1908 Summer | |
| Jasmine Jones | United States | Athletics | 2024 Summer | |
| Jayson Jones | Belize | 2000 Summer, 2008 Summer | |
| Jennifer Jones | Canada | Curling | 2014 Winter, 2022 Winter | |
| Jenny Jones | Great Britain | Snowboarding | 2014 Winter | |
| Joe Jones | Canada | Road cycling | 1968 Summer | |
| John Jones | Great Britain | Water polo | 1952 Summer, 1956 Summer | |
| John Paul Jones | United States | Athletics | 1912 Summer | |
| John Jones | Great Britain | Rowing | 1952 Summer | |
| Jonathan Jones | Barbados | Athletics | 2020 Summer | |
| Jonathan Jones | Mexico | Baseball | 2020 Summer | |
| K. C. Jones | United States | Basketball | 1956 Summer | |
| Keaton Jones | Swimming | 2024 Summer | |
| Kelley Jones | Rowing | 1992 Summer | |
| Ken Jones | Great Britain | Athletics | 1948 Summer | |
| Kyle Jones | Canada | Triathlon | 2012 Summer | |
| Lam Jones | United States | Athletics | 1976 Summer | |
| Leisel Jones | Australia | Swimming | 2000 Summer, 2004 Summer, 2008 Summer, 2012 Summer | |
| Leora Jones | United States | Handball | 1984 Summer, 1988 Summer, 1992 Summer | |
| Lloyd Jones | Athletics | 1908 Summer | |
| Lloyd Jones | France | Figure skating | 2014 Winter | |
| Lolo Jones | United States | Athletics, Bobsleigh | 2008 Summer, 2012 Summer, 2014 Winter | |
| Lou Jones | Athletics | 1956 Summer | |
| Louise Jones | Great Britain | Track cycling, Road cycling | 1988 Summer, 1992 Summer | |
| Luther Jones | United States | Rowing | 1968 Summer, 1972 Summer | |
| Luuka Jones | New Zealand | Canoe slalom | 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Mara Jones | Canada | Rowing | 2004 Summer | |
| Marie Jones | Belgium | Tennis | 1920 Summer | |
| Marion Jones | United States | Athletics | 2000 Summer, 2004 Summer | |
| Maximiliano Jones | Spain | Bobsleigh | 1968 Winter | |
| Megan Jones | Australia | Equestrian eventing | 2008 Summer | |
| Megan Jones | Great Britain | Rugby sevens | 2020 Summer, 2024 Summer | |
| Melvyn Jones | Canoe slalom | 1992 Summer | |
| Michellie Jones | Australia | Triathlon | 2000 Summer | |
| Mick Jones | Great Britain | Athletics | 1988 Summer | |
| Morgan Jones | Alpine skiing | 1988 Winter | |
| Murray Jones | New Zealand | Sailing | 1988 Summer, 1992 Summer | |
| Nate Jones | United States | Boxing | 1996 Summer | |
| Norman Jones | Australia | 1952 Summer | |
| Norman Jones | Bermuda | Sailing | 1960 Summer | |
| Omari Jones | United States | Boxing | 2024 Summer | |
| Orus Jones | Golf | 1904 Summer | |
| Oshae Jones | Boxing | 2020 Summer | |
| Pat Jones | Great Britain | Athletics | 1968 Summer | |
| Patricia Jones | Canada | 1948 Summer | |
| Perianne Jones | Cross country skiing | 2010 Winter, 2014 Winter | |
| Peter Jones [ Wikidata ] | Great Britain | Shooting | 1908 Summer, 1912 Summer | |
| Phill Jones | New Zealand | Basketball | 2000 Summer, 2004 Summer | |
| Randy Jones | United States | Bobsleigh | 1994 Winter, 1998 Winter, 2002 Winter | |
| Raymond Jones | Australia | Boxing | 1924 Summer | |
| Reggie Jones | United States | 1972 Summer | |
| Reuben Jones | Great Britain | Equestrian eventing | 1964 Summer, 1968 Summer | |
| Richard Jones | Guyana | Athletics | 1996 Summer | |
| Robin Jones | Great Britain | Figure skating | 1960 Winter | |
| Roddy Jones | Swimming | 1968 Summer | |
| Ron Jones | Athletics | 1964 Summer, 1968 Summer | |
| Roy Jones Jr. | United States | Boxing | 1988 Summer | |
| Rufus Jones | Grenada | Athletics | 1996 Summer | |
| Russell Jones | Australia | Ice hockey | 1960 Winter | |
| Samuel Jones | United States | Athletics, Tug of war | 1904 Summer | |
| Sarah Jones | Rowing | 2000 Summer, 2004 Summer | |
| Sarah Jones | Great Britain | Field hockey | 2020 Summer, 2024 Summer | |
| Sharon Jones | Figure skating | 1988 Winter | |
| Stan Jones | Athletics | 1948 Summer | |
| Stanley Jones | Road cycling | 1912 Summer | |
| Steffi Jones | Germany | Football | 2000 Summer, 2004 Summer | |
| Stephen Jones | Barbados | Athletics | 2004 Summer | |
| Stephen Jones | New Zealand | Rowing | 2016 Summer, 2020 Summer | |
| Steve Jones | Great Britain | Road cycling | 1980 Summer | |
| Steve Jones | Athletics | 1984 Summer | |
| Susan Jones | Swimming | 1972 Summer | |
| Suzy Jones | United States | 1968 Summer | |
| Terrence Jones | Bahamas | Athletics | 2024 Summer | |
| Thelma Jones | Bermuda | 1952 Summer | |
| Tim Jones | Great Britain | Swimming | 1988 Summer | |
| Timothy Jones | Zimbabwe | Road cycling | 1996 Summer | |
| Tom Jones | United States | Athletics | 1952 Summer | |
| Tom Jones | Canada | Volleyball | 1984 Summer | |
| Tomás Jones | Argentina | Swimming | 1924 Summer | |
| Trent Jones | New Zealand | Cycling BMX racing | 2016 Summer | |
| Trevor Jones | Canada | Rowing | 2020 Summer | |
| Uriah Jones | United States | Fencing | 1968 Summer | |
| Wallace Jones | Basketball | 1948 Summer | |
| Walter Jones | Great Britain | Polo | 1908 Summer | |
| Walter Jones | Bermuda | Sailing | 1960 Summer | |
| Washington Jones | United States | Boxing | 1948 Summer | |
| William Jones [ Wikidata ] | Great Britain | Wrestling | 1908 Summer | |
| William Jones | Uruguay | Rowing | 1948 Summer | |
| William Jones | Australia | Canoe sprint | 1956 Summer | |
| William Jones | Canada | Shooting | 1960 Summer | |
| William Jones | Sailing | 2020 Summer, 2024 Summer | |
| Wyatt Jones | United States | Canoe sprint | 1992 Summer | |
| Zeke Jones | Wrestling | 1992 Summer | |
| LaVerne Jones-Ferrette | Virgin Islands | Athletics | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer | |
| Diane Jones-Konihowski | Canada | 1972 Summer, 1976 Summer | |
| Marcia Jones-Smoke | United States | Canoe sprint | 1964 Summer, 1968 Summer, 1972 Summer | |
| Carolyn Jones-Young | Basketball | 1992 Summer | |
| António Jonet | Portugal | Modern pentathlon | 1952 Summer | |
| Jonet-Pastré | France | Sailing | 1900 Summer | |
| Adrianus de Jong | Netherlands | Fencing | 1908 Summer, 1912 Summer, 1920 Summer, 1924 Summer, 1928 Summer | |
| Antoinette Rijpma-de Jong | Speed skating | 2014 Winter, 2018 Winter, 2022 Winter | |
| Barbara de Jong | Rowing | 1976 Summer | |
| Bas de Jong | Water polo | 1996 Summer, 2000 Summer | |
| Bert de Jong | Speed skating | 1980 Winter | |
| Bob de Jong | 1998 Winter, 2002 Winter, 2006 Winter, 2010 Winter, 2014 Winter | |
| Jong Chun-mi | North Korea | Weightlifting | 2012 Summer | |
| Dimi de Jong | Netherlands | Snowboarding | 2014 Winter | |
| Doris de Jong | Fencing | 1928 Summer, 1932 Summer | |
| Imani de Jong [ Wikidata ] | Swimming | 2024 Summer | |
| Jong In-chol | North Korea | Judo | 1976 Summer | |
| Jos De Jong | Belgium | Wrestling | 1952 Summer | |
| Jong Jo-ung | North Korea | Boxing | 1976 Summer, 1980 Summer | |
| Koos de Jong | Netherlands | Sailing | 1948 Summer, 1952 Summer | |
| Jong Kwang-bom | North Korea | Short track speed skating | 2018 Winter | |
| Marjolein de Jong | Netherlands | Volleyball | 1992 Summer, 1996 Summer | |
| Michelle de Jong | Speed skating | 2022 Winter | |
| Jong Myong-chol | North Korea | Athletics | 2004 Summer | |
| Jong Myong-suk | Wrestling | 2016 Summer | |
| Nick de Jong | Netherlands | Sailing | 1964 Summer, 1968 Summer | |
| Nicolaas de Jong | Road cycling | 1920 Summer | |
| Jong Ok-jin | North Korea | Volleyball | 1972 Summer | |
| Petronella de Jong | Netherlands | Sailing | 2004 Summer | |
| Reggie de Jong | Swimming | 1980 Summer | |
| Rita de Jong | Rowing | 1992 Summer, 1996 Summer | |
| Sanne de Jong | Equestrian eventing | 2024 Summer | |
| Sidney de Jong | Baseball | 2004 Summer, 2008 Summer | |
| Jong Song-ok | North Korea | Athletics | 1996 Summer | |
| Jong Su-hyon | Korea Team | Ice hockey | 2018 Winter | |
| Tonny de Jong | Netherlands | Speed skating | 1994 Winter, 1998 Winter, 2002 Winter | |
| Worthy de Jong | 3x3 basketball | 2024 Summer | |
| Chung Yu-cheng | Chinese Taipei | Baseball | 1992 Summer | |
| Jong Yong-hyok | North Korea | Figure skating | 2006 Winter | |
| Jong Yong-ok | Athletics | 2000 Summer, 2004 Summer, 2008 Summer | |
| Jong Yon-hui | Artistic swimming | 2012 Summer | |
| Pap Jonga | The Gambia | Swimming | 2016 Summer | |
| Tapfumaneyi Jonga | Zimbabwe | Athletics | 1980 Summer, 1984 Summer | |
| Calvin Jong-a-Pin | Netherlands | Football | 2008 Summer | |
| Ernst de Jonge | Rowing | 1936 Summer | |
| Mark de Jonge | Canada | Canoe sprint | 2012 Summer, 2016 Summer, 2020 Summer | |
| Saskia de Jonge | Netherlands | Swimming | 2008 Summer | |
| Ferenc Jongejan | Baseball | 2000 Summer, 2004 Summer | |
| Daphne Jongejans | Diving | 1984 Summer, 1988 Summer, 1992 Summer | |
| Edwin Jongejans | 1988 Summer, 1992 Summer | |
| James Jongeneel | United States | Field hockey | 1956 Summer | |
| Philip Jongeneel | Netherlands | Rowing | 1920 Summer | |
| Ju Jong-gwan [ Wikidata ] | South Korea | Canoe sprint | 1992 Summer | |
| Grietje de Jongh | Netherlands | Athletics | 1948 Summer, 1952 Summer | |
| Ho Jong-hae [ Wikidata ] | North Korea | Short track speed skating | 1998 Winter | |
| Ri Jong-hui | Rowing | 1972 Summer | |
| Kim Jong-hwa [ Wikidata ] | Archery | 1992 Summer | |
| Maneepong Jongjit | Thailand | Badminton | 2012 Summer | |
| Weerapon Jongjoho | Boxing | 2024 Summer | |
| Somjit Jongjohor | 2004 Summer, 2008 Summer | |
| Jan Jongkind | Netherlands | Sailing | 1964 Summer | |
| Chae Jong-kook [ Wikidata ] | South Korea | Baseball | 1996 Summer | |
| Stella Jongmans | Netherlands | Athletics | 1992 Summer, 1996 Summer | |
| Kim Jong-min [ Wikidata ] | North Korea | Football | 1976 Summer | |
| Cha Jong-sok [ Wikidata ] | 1976 Summer | |
| Choe Jong-sop | Weightlifting | 1980 Summer | |
| Samarn Jongsuk | Thailand | Shooting | 1992 Summer | |
| Ma Jong-u [ Wikidata ] | North Korea | Football | 1976 Summer | |
| Jeong Jong-won [ Wikidata ] | South Korea | Cross country skiing | 2022 Winter | |
| Arnold Jonke | Austria | Rowing | 1988 Summer, 1992 Summer, 1996 Summer, 2000 Summer | |
| Charles Jonker | South Africa | Road cycling, Track cycling | 1956 Summer, 1960 Summer | |
| Karel Jonker | Canada | Rowing | 1972 Summer | |
| Kees Jonker | Netherlands | Sailing | 1936 Summer, 1948 Summer | |
| Kelly Jonker | Field hockey | 2012 Summer, 2016 Summer | |
| Patrick Jonker | Australia | Road cycling | 1992 Summer, 1996 Summer | |
| Ronald Jonker | 1968 Summer | |
| Gary Jonland | United States | Speed skating | 1972 Winter | |
| Jean Jonlet | Belgium | Rowing | 1928 Summer | |
| Emmanuel Jonnier | France | Cross country skiing | 2002 Winter, 2006 Winter, 2010 Winter | |
| Franck Jonot | Athletics | 1984 Summer | |
| Pierre Jonquères d'Oriola | Equestrian jumping | 1952 Summer, 1956 Summer, 1960 Summer, 1964 Summer, 1968 Summer | |
| Elsa Guðrún Jónsdóttir | Iceland | Cross country skiing | 2018 Winter | |
| Jón Jónsen | Denmark | Athletics | 1920 Summer | |
| Gail Jonson | New Zealand | Swimming | 1984 Summer | |
| Anna Jönsson Haag | Sweden | Cross country skiing | 2010 Winter, 2014 Winter, 2018 Winter | |
| Bengt Jönsson | Swimming | 1976 Summer | |
| Birgitta Jönsson | 1980 Summer | |
| Carina Jonsson | Archery | 1988 Summer | |
| Carl Jonsson | Tug of war | 1912 Summer | |
| Caroline Jönsson | Football | 2000 Summer, 2004 Summer | |
| Cecilia Jonsson | Sailing | 2020 Summer | |
| Christer Jönsson | Artistic gymnastics | 1968 Summer | |
| Einar Örn Jónsson | Iceland | Handball | 2004 Summer | |
| Emil Jönsson | Sweden | Cross country skiing | 2010 Winter, 2014 Winter | |
| Erik Jonsson | Shooting | 1912 Summer | |
| Fredrik Jönsson | Equestrian eventing | 1996 Summer | |
| Gustaf Jonsson | Cross country skiing | 1928 Winter, 1932 Winter | |
| Gustaf Adolf Jonsson | Shooting | 1908 Summer, 1912 Summer, 1920 Summer | |
| Hanna Jonsson | Sailing | 2024 Summer | |
| Henry Jonsson | Athletics | 1936 Summer | |
| Hugo Jonsson | Finland | Swimming | 1908 Summer | |
| Ingi Jónsson | Iceland | 1984 Summer | |
| Ingólfur Jónsson | Cross country skiing | 1980 Winter | |
| Jan Jönsson | Sweden | Equestrian eventing | 1972 Summer, 1984 Summer | |
| Jan Jonsson | Handball | 1972 Summer | |
| Janet Jonsson | Snowboarding | 2002 Winter | |
| Jenny Jonsson | 1998 Winter | |
| Jens Jønsson | Denmark | Football | 2016 Summer | |
| Jón Jónsson | Iceland | Water polo | 1936 Summer | |
| Jonas Jonsson | Sweden | Sailing | 1908 Summer, 1912 Summer | |
| Jonas Jonsson | Shooting | 1948 Summer | |
| Jörgen Jönsson | Ice hockey | 1994 Winter, 1998 Winter, 2002 Winter, 2006 Winter | |
| Kenny Jönsson | 1994 Winter, 2002 Winter, 2006 Winter | |
| Kerstin Jönßon | West Germany, Austria | Handball | 1984 Summer, 1992 Summer | |
| Lars Theodor Jonsson | Sweden | Cross country skiing | 1928 Winter | |
| Leiknir Jónsson | Iceland | Swimming | 1968 Summer | |
| Lennart Jonsson | Sweden | Athletics | 1960 Summer | |
| Magnus Jonsson | Biathlon | 2010 Winter | |
| Niklas Jonsson | Cross country skiing | 1992 Winter, 1994 Winter, 1998 Winter, 2002 Winter | |
| Ólafur Jónsson | Iceland | Handball | 1972 Summer | |
| Orvar Jönsson | Sweden | Fencing | 1972 Summer | |
| Óskar Jónsson | Iceland | Athletics | 1948 Summer | |
| Pär-Gunnar Jönsson | Sweden | Badminton | 1992 Summer, 1996 Summer, 2000 Summer | |
| Peter Jonsson | Road cycling | 1980 Summer | |
| Robert Jonsson [ Wikidata ] | Shooting | 1912 Summer | |
| Sigurður Jónsson | Iceland | Swimming | 1948 Summer | |
| Sigurður Th. Jónsson | 1948 Summer | |
| Sigurður Jónsson | Alpine skiing | 1976 Winter, 1980 Winter | |
| Stefán Jónsson | Water polo | 1936 Summer | |
| Stefán Jónsson | Handball | 1972 Summer | |
| Stefan Jonsson | Sweden | Weightlifting | 1980 Summer | |
| Sven-Olof Jonsson | Artistic gymnastics | 1920 Summer | |
| Tage Jönsson | Athletics | 1948 Summer | |
| Þórir Jónsson | Iceland | Alpine skiing | 1948 Winter | |
| Þormóður Árni Jónsson | Judo | 2008 Summer, 2012 Summer, 2016 Summer | |
| Tomas Jonsson | Sweden | Ice hockey | 1980 Winter, 1994 Winter | |
| Abigél Joó | Hungary | Judo | 2012 Summer, 2016 Summer | |
| Éva Joó | Shooting | 1988 Summer, 1992 Summer, 1996 Summer, 2004 Summer | |
| Gabor Joo | Canada | Canoe sprint | 1964 Summer, 1968 Summer | |
| Joo Hyong-jun | South Korea | Speed skating | 2014 Winter, 2018 Winter | |
| Joo Hyun-jung | Archery | 2008 Summer | |
| Joo Min-jin | Short track speed skating | 2002 Winter | |
| Joo Sae-hyuk | Table tennis | 2004 Summer, 2012 Summer, 2016 Summer | |
| Joo Soon-ahn | Sailing | 1996 Summer, 2000 Summer | |
| Joo Young-dai | Biathlon | 1988 Winter | |
| Joo Young-sam | Artistic gymnastics | 1984 Summer, 1988 Summer | |
| Márton Joób | Hungary | Canoe sprint | 2004 Summer | |
| Bak Joo-hyo | South Korea | Weightlifting | 2024 Summer | |
| István Joós | Hungary | Canoe sprint | 1980 Summer | |
| Peter Joos | Belgium | Fencing | 1984 Summer | |
| Stefan Joos | 1984 Summer, 1988 Summer | |
| Verena Jooß | Germany | Track cycling | 2008 Summer | |
| Fritz Joost | Switzerland | Road cycling | 1980 Summer | |
| Marcel Joost [ Wikidata ] | Netherlands | Baseball | 1996 Summer | |
| Patrick Jopp | Switzerland | Archery | 1980 Summer | |
| Tessa Jopp | New Zealand | Field hockey | 2020 Summer | |
| Peter Joppich | Germany | Fencing | 2004 Summer, 2008 Summer, 2012 Summer, 2016 Summer, 2020 Summer | |
| Björn Joppien | Badminton | 2004 Summer | |
| Nicole Joraanstad | United States | Curling | 2010 Winter | |
| Alejandro Jordá | Spain | Equestrian jumping | 1996 Summer | |
| Anna Jordaens | Belgium | Artistic gymnastics | 1948 Summer | |
| Jozef Jordaens | Rowing | 1976 Summer | |
| Caroline Jordan | Great Britain | Field hockey | 1988 Summer | |
| DeAndre Jordan | United States | Basketball | 2016 Summer | |
| Frank Jordan | Australia | Water polo | 1952 Summer | |
| Hartwell Jordan | United States | Sailing | 2000 Summer | |
| Jeff Jordan | Bobsleigh | 1980 Winter | |
| Joy Jordan | Great Britain | Athletics | 1960 Summer | |
| Karl Jordan | Germany | Artistic gymnastics | 1912 Summer | |
| Lino Jordan | Italy | Biathlon | 1972 Winter, 1976 Winter | |
| Michael Jordan | United States | Basketball | 1984 Summer, 1992 Summer | |
| Michal Jordán | Czech Republic | Ice hockey | 2018 Winter | |
| Orestes Jordán | Peru | Football | 1936 Summer | |
| Pearson Jordan | Barbados | Athletics | 1976 Summer | |
| Praveen Jordan | Indonesia | Badminton | 2016 Summer, 2020 Summer | |
| Roger Jordan | Barbados | Athletics | 1992 Summer | |
| Shaun Jordan | United States | Swimming | 1988 Summer, 1992 Summer | |
| Timothée Jordan | France | Cricket | 1900 Summer | |
| Walter Jordan | Australia | Rowing | 1936 Summer | |
| William Jordan | United States | 1920 Summer | |
| Willy Otto Jordan | Brazil | Swimming | 1948 Summer | |
| Winifred Jordan | Great Britain | Athletics | 1948 Summer | |
| Zane Jordan | Zambia | Swimming | 2008 Summer, 2012 Summer | |
| Krisztián Jordanov | Hungary | Artistic gymnastics | 1996 Summer | |
| Jānis Jordāns | Latvia | Athletics | 1928 Summer | |
| Isabelle Jordansson | Sweden | Ice hockey | 2010 Winter | |
| João Carlos Jordão | Brazil | Sailing | 2004 Summer | |
| Per Jordbakke | Norway | 1960 Summer, 1964 Summer | |
| Johannes Jordell | Shooting | 1912 Summer | |
| Olav Jordet | Biathlon | 1964 Winter, 1968 Winter | |
| Thomas Jordier | France | Athletics | 2016 Summer, 2020 Summer | |
| Edgar Jorek | West Germany | Artistic gymnastics | 1976 Summer | |
| Steven Jorens | Canada | Canoe sprint | 2004 Summer, 2008 Summer | |
| Selina Jörg | Germany | Snowboarding | 2010 Winter, 2014 Winter, 2018 Winter | |
| Jorge | Brazil | Football | 1968 Summer | |
| António Jorge | Portugal | Shooting | 1960 Summer | |
| Carlos Jorge | Dominican Republic | Athletics | 2012 Summer | |
| Daniel Jorge | Uruguay | Rowing | 1972 Summer | |
| Felizarda Jorge | Angola | Basketball | 2012 Summer | |
| Fernando Jorge | Cuba, Refugee Olympic Team | Canoe sprint | 2016 Summer, 2020 Summer, 2024 Summer | |
| Leandro Jorge | Mozambique | Swimming | 1996 Summer | |
| Márcio Jorge | Brazil | Equestrian eventing | 2012 Summer, 2016 Summer, 2024 Summer | |
| Maria Elisabete Jorge | Weightlifting | 2000 Summer | |
| Mário Jorge | Basketball | 1952 Summer | |
| Patricia Jorge | Portugal | Rhythmic gymnastics | 1988 Summer | |
| Rui Jorge | Football | 1996 Summer | |
| Aage Jørgensen | Denmark | Artistic gymnastics | 1920 Summer | |
| Alfred Frøkjær Jørgensen | 1920 Summer | |
| Alfred Ollerup Jørgensen | 1920 Summer | |
| Ann Jørgensen | Badminton | 1996 Summer, 2000 Summer | |
| Annette Jørgensen | Swimming | 1988 Summer | |
| Ann-Lou Jørgensen | Badminton | 2000 Summer, 2004 Summer | |
| Arne Jørgensen | Artistic gymnastics | 1920 Summer | |
| Bent Jørgensen | Track cycling | 1952 Summer | |
| Bent Jørgensen | Handball | 1972 Summer | |
| Bjarne Jørgensen | Artistic gymnastics | 1952 Summer | |
| Bjørne Jorgensen | United States | 1920 Summer | |
| Carlo Jørgensen | Denmark | Wrestling | 1928 Summer | |
| Casper Jørgensen | Track cycling | 2008 Summer | |
| Claus Jørgensen | Athletics | 1996 Summer | |
| Dagny Jørgensen | Norway | Alpine skiing | 1952 Winter | |
| Dan Jorgensen | United States | Swimming | 1988 Summer, 1992 Summer | |
| Emil Jørgensen | Denmark | Football | 1912 Summer | |
| Emma Jørgensen | Canoe sprint | 2016 Summer, 2020 Summer, 2024 Summer | |
| Erik Jørgensen | Athletics | 1948 Summer | |
| Frantz Jørgensen | Fencing | 1908 Summer | |
| Gwen Jorgensen | United States | Triathlon | 2012 Summer, 2016 Summer | |
| Harry Jørgensen | Denmark | Rowing | 1968 Summer | |
| Henning Jørgensen | Road cycling | 1972 Summer, 1980 Summer | |
| Henrik Jørgensen | Athletics | 1984 Summer, 1988 Summer | |
| Inger Jørgensen | Norway | Alpine skiing | 1956 Winter | |
| Jan Ø. Jørgensen | Denmark | Badminton | 2012 Summer, 2016 Summer | |
| Janel Jorgensen | United States | Swimming | 1988 Summer | |
| Jørgen Jørgensen | Denmark | 1936 Summer | |
| Jørgen Jørgensen | Road cycling | 1960 Summer | |
| Julius Jørgensen | Athletics | 1908 Summer | |
| Junker Jørgensen | Road cycling | 1972 Summer | |
| Kasper Winther Jørgensen | Rowing | 2012 Summer, 2016 Summer | |
| Kay Jørgensen | Handball | 1972 Summer, 1976 Summer | |
| Klavs Bruun Jørgensen | 2008 Summer | |
| Lars Jorgensen | United States | Swimming | 1988 Summer | |
| Lars T. Jørgensen | Denmark | Handball | 2008 Summer | |
| Laurits Jørgensen | Athletics | 1920 Summer | |
| Leo Jørgensen | 1928 Summer | |
| Line Jørgensen | Handball | 2012 Summer | |
| Lone Castrup Jørgensen | Equestrian dressage | 2000 Summer, 2004 Summer | |
| Lukas Jørgensen | Handball | 2024 Summer | |
| Hans Jørgensen | Rowing | 1912 Summer | |
| Max Jørgensen | Track cycling | 1948 Summer | |
| Morten Jørgensen | Rowing | 2008 Summer, 2012 Summer, 2016 Summer | |
| Niels Jørgensen | Football | 1992 Summer | |
| Nils Jørgensen | Norway | Fencing | 1936 Summer | |
| Ninja Jorgensen | United States | Volleyball | 1968 Summer | |
| Orla Jørgensen | Denmark | Road cycling | 1928 Summer | |
| Ossian Jörgensen [ Wikidata ] | Sweden | Shooting | 1908 Summer | |
| Paul Lindemark Jørgensen | Denmark | Sailing | 1960 Summer, 1968 Summer | |
| Per Sandahl Jørgensen | Road cycling | 1980 Summer | |
| Per Sarto Jørgensen | Track cycling | 1964 Summer, 1968 Summer | |
| Peter Jørgensen | Boxing | 1932 Summer | |
| Poul Jørgensen | Artistic gymnastics | 1912 Summer | |
| Reidar Jørgensen | Norway | Athletics | 1928 Summer | |
| Sigurd Jørgensen | Artistic gymnastics | 1912 Summer | |
| Silje Jørgensen | Football | 2000 Summer | |
| Stein Jorgensen | United States | Canoe sprint | 1996 Summer, 2000 Summer | |
| Svend Jørgensen | Denmark | Field hockey | 1948 Summer | |
| Tage Jørgensen | Fencing | 1948 Summer | |
| Victor Jørgensen | Boxing | 1952 Summer | |
| Viggo Jørgensen | Football | 1920 Summer | |
| Matteo Jorgenson | United States | Road cycling | 2024 Summer | |
| Hans-Georg Jörger | Germany | Fencing | 1936 Summer | |
| Darko Jorgić | Slovenia | Table tennis | 2020 Summer, 2024 Summer | |
| Jorginho | Brazil | Football | 1988 Summer | |
| João Jório | Rowing, Water polo | 1920 Summer | |
| Albert Joris | Belgium | Canoe sprint | 1936 Summer | |
| Ine Joris | Basketball | 2024 Summer | |
| Andre Jorns | Switzerland | Ice hockey | 1976 Winter | |
| Ivana Jorović | Serbia | Tennis | 2020 Summer | |
| Aletta Jorritsma | Netherlands | Rowing | 2016 Summer | |
| Hans Jorritsma | Field hockey | 1976 Summer | |
| Snæfríður Jórunnardóttir | Iceland | Swimming | 2020 Summer, 2024 Summer | |
| Andrea Jory | Italy | Bobsleigh | 1980 Winter | |
| Miklós Jós | Hungary | Art competitions | 1948 Summer | |
| Graeme Jose | Australia | Road cycling | 1972 Summer | |
| Jimmy Jose | Great Britain | Rugby | 1908 Summer | |
| Venancio José | Spain | Athletics | 1996 Summer, 2000 Summer | |
| Carl Josefsson | Sweden | Ice hockey | 1924 Winter | |
| Enar Josefsson | Cross country skiing | 1952 Winter | |
| Gustaf Josefsson | Football | 1936 Summer | |
| Johannes Josefsson | Iceland | Wrestling | 1908 Summer | |
| Andreas Josenhans | Canada | Sailing | 1976 Summer | |
| Anilus Joseph | Haiti | Athletics | 1972 Summer | |
| Charles Joseph | Trinidad and Tobago | 1972 Summer, 1976 Summer, 1980 Summer | |
| Curtis Joseph | Canada | Ice hockey | 2002 Winter | |
| Daryl Joseph | Antigua and Barbuda | Boxing | 1988 Summer | |
| Joseph Dosu | Nigeria | Football | 1996 Summer | |
| Edouard Joseph | Haiti | Weightlifting | 2016 Summer | |
| Esther Joseph | Nigeria | Athletics | 2024 Summer | |
| Fabian Joseph | Canada | Ice hockey | 1992 Winter, 1994 Winter | |
| Fitzgerald Joseph | Belize | Road cycling | 1988 Summer | |
| Gémima Joseph | France | Athletics | 2020 Summer, 2024 Summer | |
| Gulfam Joseph | Pakistan | Shooting | 2020 Summer, 2024 Summer | |
| Hermin Joseph | Dominica | Athletics | 1996 Summer | |
| Irene Joseph | Indonesia | 2000 Summer | |
| James Joseph | Guyana | Track cycling | 1980 Summer, 1984 Summer | |
| Jason Joseph | Switzerland | Athletics | 2020 Summer, 2024 Summer | |
| Jefferson-Lee Joseph | France | Rugby sevens | 2024 Summer | |
| Jessica Joseph | United States | Figure skating | 1998 Winter | |
| Jocelyn Joseph | Antigua and Barbuda | Athletics | 1984 Summer, 1988 Summer | |
| Lois Joseph | Australia | Fencing | 1956 Summer | |
| Marie-Lyne Joseph | Dominica | Athletics | 2004 Summer | |
| Michael Joseph | Belize | 1992 Summer | |
| Michael Joseph | Cayman Islands | Sailing | 1996 Summer | |
| Michael Joseph | Saint Lucia | Athletics | 2024 Summer | |
| Miles Joseph | United States | Football | 1996 Summer | |
| Mireille Joseph | Haiti | Athletics | 1972 Summer | |
| Moise Joseph | 2004 Summer, 2012 Summer | |
| Restituta Joseph | Tanzania | 1996 Summer, 2000 Summer, 2004 Summer | |
| Rogail Joseph | South Africa | 2024 Summer | |
| Ronald Joseph | United States | Figure skating | 1964 Winter | |
| Ronald Joseph | Virgin Islands | Wrestling | 1976 Summer | |
| Rosara Joseph | New Zealand | Cycling mountain bike | 2008 Summer | |
| Rubens Joseph | Haiti | Judo | 1992 Summer | |
| Stanley Joseph | France | Athletics | 2016 Summer | |
| Tad Joseph | Grenada | Boxing | 1988 Summer | |
| Vivian Joseph | United States | Figure skating | 1964 Winter | |
| Washington Joseph | Brazil | Basketball | 1972 Summer | |
| Wilnor Joseph | Haiti | Athletics | 1976 Summer | |
| Zepherinus Joseph | Saint Lucia | 2004 Summer | |
| Margo Joseph-Kuo [ Wikidata ] | Australia | Artistic swimming | 2024 Summer | |
| Christelle Joseph-Mathieu | France | Handball | 2000 Summer | |
| Célia Joseph-Noël | Rhythmic gymnastics | 2024 Summer | |
| Dawn Josephs | Canada | Athletics | 1952 Summer | |
| Janice Josephs | South Africa | 2004 Summer | |
| Sarah Josephson | United States | Artistic swimming | 1984 Summer, 1988 Summer, 1992 Summer | |
| Karen Josephson | 1988 Summer, 1992 Summer | |
| Trevor Josephson | Canada | Rowing | 1972 Summer | |
| Chase Josey | United States | Snowboarding | 2018 Winter, 2022 Winter | |
| Sunil Lal Joshi | Nepal | Weightlifting | 1996 Summer | |
| Anthony Joshua | Great Britain | Boxing | 2012 Summer | |
| Erwin Josi | Switzerland | Alpine skiing | 1980 Winter | |
| Roman Josi | Ice hockey | 2014 Winter | |
| Lucien Josiah | Botswana | Athletics | 1980 Summer | |
| Bohuslav Josífek | Czechoslovakia | Military ski patrol | 1924 Winter | |
| Anton Josipović | Yugoslavia | Boxing | 1984 Summer | |
| Eric Josjö | Sweden | Athletics | 1984 Summer | |
| Chris Joslin [ Wikidata ] | United States | Skateboarding | 2024 Summer | |
| Jean Josselin | France | Boxing | 1960 Summer | |
| Arnaud Josserand | Volleyball | 1992 Summer | |
| Marion Josserand | Freestyle skiing | 2010 Winter, 2014 Winter | |
| Raoul Josset | France, United States | Art competitions | 1924 Summer, 1936 Summer | |
| René Josset | France | Athletics | 1948 Summer | |
| Frédérique Jossinet | Judo | 2004 Summer, 2008 Summer | |
| Hans Jost | Switzerland | Boxing | 1952 Summer | |
| Hansruedi Jost | Athletics | 1960 Summer | |
| Jeffrey Jost | United States | Bobsleigh | 1980 Winter, 1984 Winter | |
| Friedrich Josten | West Germany | Field hockey | 1968 Summer | |
| Angsuman Jotikasthira | Thailand | Shooting | 1984 Summer | |
| Jorge Jottar | Chile | 1968 Summer | |
| Philippe Joualin | France | 2000 Summer | |
| Paul Jouanneau | Brazil | Swimming | 1976 Summer | |
| Robert Jouaville | France | Wrestling | 1948 Summer | |
| Brian Joubert | Figure skating | 2002 Winter, 2006 Winter, 2010 Winter, 2014 Winter | |
| Danie Joubert | South Africa | Athletics | 1932 Summer | |
| Jean-Marie Joubert | France | Track cycling | 1952 Summer | |
| Michael Joubert | Australia | Athletics | 1996 Summer | |
| Micheline Joubert | France | Figure skating | 1968 Winter | |
| Adrienne Jouclard | Art competitions | 1932 Summer, 1948 Summer | |
| Abdullah Al-Joud | Saudi Arabia | Athletics | 2012 Summer | |
| Ahmed Musa Jouda | Sudan | 1984 Summer, 1988 Summer | |
| Lotfi Joudi | Tunisia | Table tennis | 1988 Summer | |
| Henri Joudiou | France | Wrestling | 1920 Summer | |
| Madeleine Jouffroy | Artistic gymnastics | 1952 Summer | |
| Quentin Jouffroy | Volleyball | 2024 Summer | |
| Ahed Joughili | Syria | Weightlifting | 2008 Summer, 2012 Summer | |
| Noé Jouin | France | Field hockey | 2024 Summer | |
| Rim Jouini | Tunisia | Boxing | 2012 Summer | |
| Caroline Jouisse | France | Marathon swimming | 2024 Summer | |
| Stéphane Joulin | Handball | 1996 Summer, 2000 Summer | |
| Mohamed Ben Joullon | Morocco | Fencing | 1960 Summer | |
| Khalid Ibrahim Jouma | Bahrain | Athletics | 1988 Summer, 1992 Summer | |
| Abdul Karim Joumaa | Syria | 1980 Summer | |
| Joung Da-woon | South Korea | Judo | 2012 Summer | |
| Joung Young-suk | Biathlon | 1988 Winter | |
| Jaakko Jouppila | Finland | Athletics | 1948 Summer | |
| Daria Joura | Australia | Artistic gymnastics | 2008 Summer | |
| Étienne Jourdain | France | Wrestling | 1924 Summer | |
| Frantz Jourdain | Art competitions | 1912 Summer | |
| Christian Jourdan | Road cycling | 1976 Summer | |
| Georges Jourdan | Fencing | 1900 Summer | |
| Ron Jourdan | United States | Athletics | 1972 Summer | |
| Fernand Jourdant | France | Fencing | 1932 Summer | |
| Vincent Jourdenais | Canada | Canoe sprint | 2020 Summer | |
| Jean Jourlin | France | Wrestling | 1928 Summer, 1936 Summer | |
| Laurent Journet | Swimming | 1988 Summer | |
| Patrick Journoud | Athletics | 1988 Summer | |
| André Jousseaume | Equestrian dressage, Equestrian eventing | 1932 Summer, 1936 Summer, 1948 Summer, 1952 Summer, 1956 Summer | |
| Marc Jousset | Sailing | 1900 Summer | |
| Kitty-Lynn Joustra | Netherlands | Water polo | 2020 Summer, 2024 Summer | |
| Sjoerd Joustra | Art competitions | 1948 Summer | |
| Richard Jouve | France | Cross country skiing | 2018 Winter, 2022 Winter | |
| Sébastien Jouve | Canoe sprint | 2008 Summer, 2012 Summer, 2016 Summer | |
| Roger Jouy | Rowing | 1968 Summer | |
| Sergejus Jovaiša | Soviet Union, Lithuania | Basketball | 1980 Summer, 1992 Summer | |
| Raymond Joval | Netherlands | Boxing | 1992 Summer | |
| Aleksandar Jovančević | Serbia and Montenegro | Wrestling | 1996 Summer | |
| Bojan Jovanović | Croatia | Fencing | 2012 Summer | |
| Dragiša Jovanović | Yugoslavia | Bobsleigh | 1992 Winter | |
| Lazar Jovanović | Shooting | 1936 Summer | |
| Marija Jovanović | Montenegro | Handball | 2012 Summer, 2016 Summer | |
| Marko Jovanović | Serbia | Football | 2008 Summer | |
| Miodrag Jovanović | Yugoslavia | 1948 Summer | |
| Nebojša Jovanović | Serbia | Road cycling | 2008 Summer | |
| Nedeljko Jovanović | Serbia and Montenegro | Handball | 2000 Summer | |
| Nevena Jovanović | Serbia | Basketball | 2016 Summer, 2020 Summer, 2024 Summer | |
| Pavle Jovanovic | United States | Bobsleigh | 2006 Winter | |
| Sanja Jovanović | Croatia | Swimming | 2004 Summer, 2008 Summer, 2012 Summer | |
| Slobodan Jovanović | Yugoslavia | Rowing | 1948 Summer | |
| Puleksenija Jovanoska | North Macedonia | Karate | 2020 Summer | |
| Ed Jovanovski | Canada | Ice hockey | 2002 Winter | |
| María del Mar Jover | Spain | Athletics | 2016 Summer | |
| Dijana Jovetić | Croatia | Handball | 2012 Summer | |
| Boro Jović | Yugoslavia | Volleyball | 1980 Summer | |
| Božidar Jović | Croatia | Handball | 1996 Summer | |
| Nikola Jović | Serbia | Basketball | 2024 Summer | |
| Stefan Jović | 2016 Summer | |
| Zoran Jovičić | Slovenia | Handball | 2000 Summer, 2004 Summer | |
| Milan Jovin | Yugoslavia | Football | 1980 Summer | |
| Dejan Jovković | Independent Olympians | Athletics | 1992 Summer | |
| Drago Jovović | Yugoslavia | Handball | 1980 Summer | |
| Nikola Jovović | Serbia | Volleyball | 2024 Summer | |
| Mirjana Jovović-Horvat | Yugoslavia, Bosnia and Herzegovina | Shooting | 1984 Summer, 1992 Summer | |
| Mohammed Jowad | Iraq | Weightlifting | 1992 Summer | |
| Sue Jowett | New Zealand | Athletics | 1976 Summer | |
| Bernard Joy | Great Britain | Football | 1936 Summer | |
| Greg Joy | Canada | Athletics | 1976 Summer | |
| Sara Joya | Peru | Volleyball | 1996 Summer | |
| Bob Joyce | Australia | Athletics | 1956 Summer | |
| Bob Joyce | Canada | Ice hockey | 1988 Winter | |
| Carol Joyce | South Africa | Canoe sprint | 2008 Summer | |
| David Oliver Joyce | Ireland | Boxing | 2016 Summer | |
| Dick Joyce | New Zealand | Rowing | 1968 Summer, 1972 Summer | |
| Grace Joyce [ Wikidata ] | United States | 2024 Summer | |
| Jasmine Joyce-Butchers | Great Britain | Rugby sevens | 2016 Summer, 2020 Summer, 2024 Summer | |
| John Joe Joyce | Ireland | Boxing | 2008 Summer | |
| Johnny Joyce | United States | Athletics | 1904 Summer | |
| Joe Joyce | Great Britain | Boxing | 2016 Summer | |
| Kara Lynn Joyce | United States | Swimming | 2004 Summer, 2008 Summer, 2012 Summer | |
| Kevin Joyce | Basketball | 1972 Summer | |
| Kieran Joyce | Ireland | Boxing | 1984 Summer, 1988 Summer | |
| Monica Joyce | Athletics | 1984 Summer | |
| Rebecca Joyce | Australia | Rowing | 1996 Summer | |
| Regina Joyce | Ireland | Athletics | 1984 Summer | |
| Dan Joye | United States | Luge | 2006 Winter, 2010 Winter | |
| Prudent Joye | France | Athletics | 1936 Summer | |
| Al Joyner | United States | 1984 Summer | |
| Florence Griffith Joyner | 1984 Summer, 1988 Summer | |
| Jackie Joyner-Kersee | 1984 Summer, 1988 Summer, 1992 Summer, 1996 Summer | |
| Betina Jozami | Argentina | Tennis | 2008 Summer | |
| Zygfryd Józefiak | Poland | Field hockey | 1980 Summer | |
| Lucjan Józefowicz | Track cycling | 1964 Summer | |
| Davor Jozić | Yugoslavia | Football | 1988 Summer | |
| Gábor Józsa | Hungary | Athletics | 2016 Summer | |
| Levente Józsa | Taekwondo | 2024 Summer | |
| Bogna Jóźwiak | Poland | Fencing | 2008 Summer, 2016 Summer | |
| Jarosława Jóźwiakowska | Athletics | 1960 Summer, 1964 Summer | |
| Jan Józwik | Speed skating | 1980 Winter | |
| Joanna Jóźwik | Athletics | 2016 Summer, 2020 Summer | |
| Marek Jóźwik | 1972 Summer | |
| Urszula Jóźwik | 1968 Summer, 1972 Summer | |
| Juan Manuel López Jr. | Puerto Rico | Boxing | 2024 Summer | |
| Pedro García Jr. | Peru | Shooting | 1980 Summer, 1984 Summer | |
| Peter Rull Jr. | Hong Kong | 1984 Summer | |
| Kristina Jørgensen | Denmark | Handball | 2024 Summer | |
| Ju Chun-sam | North Korea | Archery | 1972 Summer | |
| Ju Hsiang-hung | Chinese Taipei | Judo | 1988 Summer | |
| Ju Hui | South Korea | Handball | 2012 Summer, 2020 Summer | |
| Ju Hyeong-gyeol | Athletics | 1964 Summer | |
| Ju Hye-ri | Cross country skiing | 2018 Winter | |
| Ju Jeong-hyeon | Equestrian jumping | 2004 Summer | |
| Ju Jixin | China | Volleyball | 1984 Summer | |
| Ju Rui | Rowing | 2020 Summer | |
| Ju Sang-jeom | South Korea | Boxing | 1952 Summer | |
| Mansour Al-Juaid | Saudi Arabia | Athletics | 1972 Summer | |
| Juan Carlos I | Spain | Sailing | 1972 Summer | |
| Juan Jesus | Brazil | Football | 2012 Summer | |
| Rafael de Juan | Spain | Shooting | 1952 Summer, 1960 Summer | |
| Julio Juaneda | Argentina | Weightlifting | 1932 Summer | |
| Juang Jen-wuh | Chinese Taipei | Judo | 1972 Summer | |
| Juani | Spain | Football | 1976 Summer | |
| Arquímedes Juanicó | Uruguay | Rowing | 1936 Summer | |
| Juanito | Spain | Football | 1976 Summer | |
| Juanito | 1980 Summer | |
| Carles Juanmartí | Canoe slalom | 2000 Summer, 2004 Summer | |
| Alberto Juantorena | Cuba | Athletics | 1972 Summer, 1976 Summer, 1980 Summer | |
| Osmany Juantorena | Italy | Volleyball | 2016 Summer, 2020 Summer | |
| Adan Juárez | Mexico | Road cycling | 1996 Summer | |
| Agustín Juárez | 1968 Summer | |
| Elio Juárez | Uruguay | Track cycling | 1964 Summer | |
| Heidy Juárez | Guatemala | Taekwondo | 2004 Summer | |
| Joana Juárez | Spain | Artistic gymnastics | 1996 Summer | |
| Rocky Juarez | United States | Boxing | 2000 Summer | |
| Sofie Juarez | Andorra | Alpine skiing | 2010 Winter | |
| Tinker Juarez | United States | Cycling mountain bike | 1996 Summer, 2000 Summer | |
| Eric Jubb | Canada | Swimming | 1948 Summer | |
| René Jubeau | France | Athletics | 1924 Summer | |
| Mauricio Jubis | El Salvador | 1968 Summer | |
| Jubzhang | Bhutan | Archery | 1992 Summer, 1996 Summer, 2000 Summer | |
| Marcelo Jucá | Brazil | Swimming | 1980 Summer, 1984 Summer | |
| Leon Jucewicz | Poland | Speed skating | 1924 Winter | |
| Jucinara | Brazil | Football | 2020 Summer | |
| Robert Juckel | Germany | Artistic gymnastics | 2004 Summer, 2008 Summer | |
| Ulrich Jucker | Switzerland | Luge | 1964 Winter | |
| Aleksandr Jucov | Moldova | Athletics | 1996 Summer | |
| Celestinas Jucys | Soviet Union | Rowing | 1964 Summer | |
| Albert Jud | Switzerland | Athletics | 1936 Summer | |
| Paul Juda | United States | Artistic gymnastics | 2024 Summer | |
| Robin Judah | Great Britain | Sailing | 1968 Summer | |
| Robert Juday | United States | Athletics | 1924 Summer | |
| Isabel Judd | Great Britain | Artistic gymnastics | 1928 Summer | |
| Norman Judd | Ireland | Water polo | 1928 Summer | |
| Bruce Judge | New Zealand | Field hockey | 1964 Summer, 1968 Summer | |
| David Judge | Great Britain | 1964 Summer | |
| Grantley Judge | New Zealand | 1964 Summer | |
| Zoltán Judik | Hungary | Basketball | 1960 Summer | |
| Anne Judkins | New Zealand | Athletics | 1992 Summer | |
| Jue Chin-shen | Chinese Taipei | Weightlifting | 1960 Summer | |
| Jonas Slettemark Juel [ Wikidata ] | Norway | Rowing | 2024 Summer | |
| Claus Juell | Sailing | 1920 Summer | |
| Didrik Bastian Juell | Freestyle skiing | 2014 Winter | |
| Cees Juffermans | Netherlands | Short track speed skating | 2002 Winter, 2006 Winter | |
| Pedro Jufresa | Spain | Field hockey | 1992 Summer | |
| Ramón Jufresa | 1992 Summer, 1996 Summer, 2000 Summer | |
| Vlado Jug | Yugoslavia | Ice hockey | 1968 Winter | |
| Adyaagiin Jügdernamjil | Mongolia | Weightlifting | 1980 Summer | |
| Medea Jugeli | Soviet Union | Artistic gymnastics | 1952 Summer | |
| Mervana Jugić-Salkić | Bosnia and Herzegovina | Tennis | 2004 Summer | |
| Lea Jugovac [ Wikidata ] | Croatia | Snowboarding | 2022 Winter | |
| Adrián Juhász | Hungary | Rowing | 2016 Summer | |
| Alexander Juhasz | Canada | Water polo | 1984 Summer | |
| Bela Juhasz | Yugoslavia | Wrestling | 1928 Summer | |
| Béla Juhász | Hungary | Athletics | 1952 Summer | |
| István Juhász | Boxing | 1952 Summer | |
| István Juhász | Football | 1968 Summer | |
| Katalin Juhász | Fencing | 1960 Summer, 1964 Summer | |
| Péter Juhász | Football | 1972 Summer | |
| Vanda Juhász | Athletics | 2012 Summer | |
| Ágnes Juhász-Balajcza | Volleyball | 1980 Summer | |
| Christian Juhl | Denmark | Artistic gymnastics | 1920 Summer | |
| Kamilla Rytter Juhl | Badminton | 2008 Summer, 2012 Summer, 2016 Summer | |
| Michael Juhlin | Virgin Islands | Bobsleigh | 1992 Winter | |
| Patrik Juhlin | Sweden | Ice hockey | 1994 Winter | |
| Julius Juhn | Austria | 1948 Winter | |
| Markku Juhola | Finland | Athletics | 1972 Summer | |
| Edgar Juillerat | Switzerland | Weightlifting | 1924 Summer | |
| Francisco Juillet | Chile | Track cycling | 1924 Summer, 1928 Summer | |
| Geoffrey Jukes | New Zealand | Shooting | 2000 Summer | |
| Hamilton Jukes | Great Britain | Ice hockey | 1924 Winter | |
| Louise Jukes | Handball | 2012 Summer | |
| Dinko Jukić | Austria | Swimming | 2008 Summer, 2012 Summer | |
| Ivan Jukić | Croatia | Rowing | 2000 Summer | |
| Mirna Jukić | Austria | Swimming | 2004 Summer, 2008 Summer | |
| Jorge Jukich [ Wikidata ] | Uruguay | Road cycling | 1968 Summer, 1972 Summer | |
| Zigmas Jukna | Soviet Union | Rowing | 1960 Summer, 1964 Summer, 1968 Summer | |
| Martti Jukola | Finland | Athletics | 1924 Summer | |
| Alfons Julen | Switzerland | Military ski patrol, Cross country skiing | 1924 Winter, 1928 Winter | |
| Anton Julen | Military ski patrol | 1924 Winter | |
| Martin Julen | Alpine skiing | 1956 Winter | |
| Max Julen | 1984 Winter | |
| Oswald Julen | Nordic combined | 1936 Winter | |
| Simon Julen | Cross country skiing | 1924 Winter | |
| Arsen Julfalakyan | Armenia | Wrestling | 2008 Summer, 2012 Summer, 2016 Summer | |
| Levon Julfalakyan | Soviet Union | 1988 Summer | |
| Cyril Julian | France | Basketball | 2000 Summer | |
| Jeff Julian | New Zealand | Athletics | 1960 Summer, 1964 Summer | |
| Ronald Julião | Brazil | 2012 Summer | |
| Bobby Julich | United States | Road cycling | 2004 Summer | |
| Allan Julie | Seychelles | Sailing | 1996 Summer, 2000 Summer, 2004 Summer, 2008 Summer, 2016 Summer | |
| Bruno Julie | Mauritius | Boxing | 2008 Summer | |
| Kitson Julie | Seychelles | 2004 Summer | |
| Denyse Julien | Canada | Badminton | 1992 Summer, 1996 Summer, 2004 Summer | |
| Mélody Julien | France | Athletics | 2024 Summer | |
| Åke Julin | Sweden | Water polo | 1948 Summer, 1952 Summer | |
| Harald Julin | Swimming, Water polo | 1908 Summer, 1912 Summer, 1920 Summer | |
| Magda Julin | Figure skating | 1920 Summer | |
| Pia Julin | Finland | Shooting | 2000 Summer | |
| Rolf Julin | Sweden | Water polo | 1948 Summer | |
| Urho Julin | Finland | Athletics | 1952 Summer | |
| Júlio César | Brazil | Football | 1976 Summer | |
| Deivi Julio | Colombia | Boxing | 2008 Summer | |
| Jorge Eliécer Julio | 1988 Summer | |
| Sylwia Julito | Poland | Fencing | 1960 Summer | |
| Leigh Julius | South Africa | Athletics | 2004 Summer, 2008 Summer | |
| Ryan Julius | Field hockey | 2020 Summer, 2024 Summer | |
| Jeffrey Julmis | Haiti | Athletics | 2012 Summer, 2016 Summer | |
| Eduardo Julve | Peru | 1948 Summer | |
| Abdallah Juma | Kenya | Weightlifting | 1992 Summer | |
| Ibrahim Juma | Tanzania | Athletics | 1984 Summer | |
| Ibrahim Khalil Juma | Iraq | Wrestling | 1980 Summer | |
| Richard Juma | Kenya | Athletics | 1972 Summer | |
| Suleman Juma | Weightlifting | 1988 Summer | |
| Mahboub Juma'a | Kuwait | Football | 1980 Summer | |
| Bayan Jumah | Syria | Swimming | 2012 Summer, 2016 Summer | |
| Ayman Jumean [ Wikidata ] | Jordan | Fencing | 1984 Summer | |
| Pierre de Jumilhac [ Wikidata ] | France | Polo | 1924 Summer | |
| Takanobu Jumonji | Japan | Track cycling | 1996 Summer | |
| Jun Dae-je | South Korea | Wrestling | 1984 Summer | |
| Jun Jae-youn | Badminton | 2004 Summer, 2008 Summer | |
| Jun Jung-lin | Bobsleigh | 2014 Winter, 2018 Winter | |
| Jun Kwang-rak | Canoe sprint | 1996 Summer | |
| Meng Jun | China | Field hockey | 2008 Summer | |
| Jun Woong-tae | South Korea | Modern pentathlon | 2016 Summer, 2020 Summer, 2024 Summer | |
| Jun Yeung-hae | Cross country skiing | 1988 Winter | |
| Khawaja Junaid | Pakistan | Field hockey | 1992 Summer | |
| Yan Juncheng [ Wikidata ] | China | Ice hockey | 2022 Winter | |
| Rubén Junco | Cuba | Water polo | 1968 Summer | |
| Luis Juncos | Argentina | Swimming | 1984 Summer | |
| Rossana Juncos | 1976 Summer | |
| Cory Juneau | United States | Skateboarding | 2020 Summer | |
| Joé Juneau | Canada | Ice hockey | 1992 Winter | |
| Rolf Junefelt | Sweden | Modern pentathlon | 1964 Summer | |
| Jan Junell | Speed skating | 1980 Winter, 1984 Winter | |
| Chen Juner [ Wikidata ] | China | Swimming | 2024 Summer | |
| Sara Junevik | Sweden | 2020 Summer, 2024 Summer | |
| Andy Jung | Switzerland | Modern pentathlon | 1984 Summer, 1988 Summer | |
| Andy Jung | Australia | Short track speed skating | 2018 Winter | |
| Anne Jung | Germany | Rhythmic gymnastics | 1996 Summer | |
| Brandon Jung | Canada | Water polo | 2008 Summer | |
| Jung Bu-kyung | South Korea | Judo | 2000 Summer | |
| Jung Dae-young | Volleyball | 2004 Summer, 2012 Summer | |
| Dieter Jung | West Germany | Fencing | 1968 Summer, 1972 Summer | |
| Jung Dong-hyun | South Korea | Alpine skiing | 2010 Winter, 2014 Winter, 2018 Winter, 2022 Winter | |
| Jung Eui-myung | Cross country skiing | 2002 Winter, 2006 Winter | |
| Jung Gil-ok | Fencing | 2008 Summer, 2012 Summer | |
| Hendrik Jung | East Germany | 1980 Summer | |
| Jung Hye-lim | South Korea | Athletics | 2012 Summer | |
| Jung Hyo-jung | Fencing | 2008 Summer, 2012 Summer | |
| Jung Hyun-young | Swimming | 2020 Summer | |
| Jung Jae-eun | Taekwondo | 2000 Summer | |
| Jung Jae-kun | Basketball | 1996 Summer | |
| Jung Jae-kwon | Football | 1992 Summer | |
| Jung Jae-sung | Badminton | 2008 Summer, 2012 Summer | |
| Jung Ji-geun | Shooting | 2016 Summer | |
| Jung Ji-hae | Handball | 2012 Summer | |
| Jung Ji-hyun | Wrestling | 2004 Summer, 2008 Summer, 2012 Summer | |
| Jung Ji-in | Handball | 2020 Summer | |
| Jung Jin-hwa | Modern pentathlon | 2012 Summer, 2016 Summer, 2020 Summer | |
| Jung Jin-soo | Artistic gymnastics | 1992 Summer, 1996 Summer, 2000 Summer | |
| Jung Jin-sun | Fencing | 2008 Summer, 2012 Summer, 2016 Summer | |
| Jung Ju-mi | Biathlon | 2018 Winter | |
| Jung Kang-wook | Handball | 1992 Summer | |
| Jung Kwang-seok | Football | 1992 Summer | |
| Jung Kyung-eun | Badminton | 2012 Summer, 2016 Summer | |
| Lovieanne Jung | United States | Softball | 2004 Summer, 2008 Summer | |
| Mathias Jung | East Germany | Biathlon | 1980 Winter | |
| Michael Jung | Germany | Equestrian eventing | 2012 Summer, 2016 Summer, 2020 Summer, 2024 Summer | |
| Jung Mi-ran | South Korea | Basketball | 2004 Summer | |
| Otto Jung | Argentina | Alpine skiing | 1948 Winter, 1952 Winter | |
| Samaresh Jung | India | Shooting | 2008 Summer | |
| Jung Sang-jin | South Korea | Athletics | 2012 Summer | |
| Jung Seul-ki | Swimming | 2008 Summer | |
| Jung Seung-gi | Skeleton | 2022 Winter | |
| Jung Seung-hwa | Fencing | 2016 Summer | |
| Jung Seung-hyun | Football | 2016 Summer | |
| Jung Si-yun | Korea Team | Ice hockey | 2018 Winter | |
| Jung Soo-keun | South Korea | Baseball | 2000 Summer | |
| Jung Soon-ok | Volleyball | 1976 Summer | |
| Jung Soon-ok | Athletics | 2008 Summer | |
| Jung Soon-won | Wrestling | 1996 Summer | |
| Jung Sung-ahn | Sailing | 1992 Summer, 1996 Summer, 2000 Summer, 2004 Summer | |
| Jung Sung-il | Figure skating | 1988 Winter, 1992 Winter, 1994 Winter | |
| Jung Sung-ryong | Football | 2008 Summer, 2012 Summer | |
| Jung Sung-sook | Judo | 1996 Summer, 2000 Summer | |
| Jung Sun-min | Basketball | 1996 Summer, 2000 Summer, 2008 Summer | |
| Jung Sun-yong | Judo | 1992 Summer, 1996 Summer | |
| Jung Su-young | Handball | 2008 Summer, 2012 Summer | |
| Jung Won-yong | Swimming | 2012 Summer | |
| Jung Woo-young | Football | 2012 Summer | |
| Jung Ye-rin | Judo | 2024 Summer | |
| Jung Young-ho | Wrestling | 2004 Summer, 2008 Summer | |
| Jung Yu-ra | Handball | 2012 Summer, 2016 Summer, 2020 Summer | |
| Heinz Junga | Germany | Swimming | 1964 Summer | |
| Thomas Jungbauer [ Wikidata ] | Dominican Republic | Football | 2024 Summer | |
| Fritz Jungblut | Germany | Speed skating | 1928 Winter | |
| Michel Jungblut | Luxembourg | Art competitions | 1932 Summer | |
| Tanumafili Jungblut | American Samoa | Weightlifting | 2016 Summer, 2020 Summer | |
| Viviane Jungblut | Brazil | Swimming, Marathon swimming | 2020 Summer, 2024 Summer | |
| Klaus Jungbluth | Ecuador | Cross country skiing | 2018 Winter | |
| Stefan Junge | East Germany | Athletics | 1972 Summer | |
| André Jungen | Switzerland | Cross country skiing | 1992 Winter | |
| Marie-Laurence Jungfleisch | Germany | Athletics | 2016 Summer, 2020 Summer | |
| Henri Junghänel | Shooting | 2016 Summer | |
| Wolfgang Junginger | West Germany | Alpine skiing | 1976 Winter | |
| Caren Jungjohann | West Germany, Germany | Field hockey | 1988 Summer, 1992 Summer | |
| Axel Jungk | Germany | Skeleton | 2018 Winter, 2022 Winter | |
| Phillip Jungman | United States | Shooting | 2020 Summer | |
| Ctirad Jungmann | Czechoslovakia | Rowing | 1980 Summer | |
| Josef Jungmann | Fencing | 1920 Summer, 1924 Summer, 1928 Summer, 1936 Summer | |
| Ebba Jungmark | Sweden | Athletics | 2012 Summer | |
| Bärbel Jungmeier | Austria | Cycling mountain bike | 2004 Summer | |
| Shin Jung-whi [ Wikidata ] | South Korea | Diving | 2024 Summer | |
| Gerold Jungwirth | Austria | Judo | 1972 Summer | |
| Stanislav Jungwirth | Czechoslovakia | Athletics | 1952 Summer, 1956 Summer | |
| Tomáš Jungwirth | 1968 Summer | |
| Kim Jun-ho | North Korea | Shooting | 1980 Summer | |
| Rizki Juniansyah | Indonesia | Weightlifting | 2024 Summer | |
| Gustar Junianto | 2004 Summer | |
| Gilmore Junio | Canada | Speed skating | 2014 Winter, 2018 Winter, 2022 Winter | |
| João Gomes Júnior | Brazil | Swimming | 2016 Summer | |
| Josh Junior | New Zealand | Sailing | 2016 Summer, 2020 Summer | |
| Léo Júnior | Brazil | Football | 1976 Summer | |
| Gracie Junita | Malaysia | Diving | 2004 Summer | |
| Bruno Junk | Soviet Union | Athletics | 1952 Summer, 1956 Summer | |
| Sophia Junk | Germany | 2024 Summer | |
| Leni Junker | 1928 Summer | |
| Renate Junker | 1960 Summer | |
| Oswald Junkes | Weightlifting | 1952 Summer | |
| Natthanan Junkrajang | Thailand | Swimming | 2008 Summer, 2012 Summer, 2016 Summer | |
| Ella Junnila | Finland | Athletics | 2020 Summer, 2024 Summer | |
| Willy Junod | Switzerland | Biathlon | 1964 Winter | |
| João Junqueira | Portugal | Athletics | 1992 Summer | |
| Juan Junqueras | Spain | Athletics, Field hockey | 1924 Summer, 1928 Summer | |
| Maximo Junta | Philippines | Road cycling, Track cycling | 1972 Summer | |
| Feliciano Juntareal | Sailing | 1964 Summer | |
| Chartchai Juntrat | Thailand | Road cycling | 1976 Summer | |
| Julius Junttila | Finland | Ice hockey | 2018 Winter | |
| Antti Juntumaa | Boxing | 1980 Summer | |
| Peng Junyue [ Wikidata ] | China | Luge | 2022 Winter | |
| Inga Juodeškienė | Lithuania | Athletics | 2000 Summer, 2004 Summer | |
| Erwin Juon | Switzerland | Bobsleigh | 1972 Winter | |
| Arvydas Juozaitis | Soviet Union | Swimming | 1976 Summer | |
| Leonas Juozapaitis | Lithuania | Football | 1924 Summer | |
| Peter Jupke | West Germany | Judo | 1984 Summer | |
| Anna Juppe [ Wikidata ] | Austria | Biathlon | 2022 Winter | |
| Grit Jurack | Germany | Handball | 1996 Summer, 2008 Summer | |
| Michael Jurack | Judo | 2004 Summer | |
| Emil Juracka | Austria | Handball | 1936 Summer | |
| Alberto Jurado | Ecuador | Athletics | 1924 Summer | |
| Christofer Jurado | Panama | Road cycling | 2020 Summer | |
| Enrique Jurado | Philippines | Wrestling | 1936 Summer | |
| Ricardo Jurado | Spain | Equestrian jumping | 2000 Summer | |
| Severo Jurado | Equestrian dressage | 2016 Summer, 2020 Summer | |
| Sherali Juraev | Uzbekistan | Judo | 2016 Summer | |
| Darija Jurak Schreiber | Croatia | Tennis | 2020 Summer | |
| Navruz Jurakobilov | Uzbekistan | Judo | 2012 Summer | |
| Jurandir | Brazil | Football | 1960 Summer | |
| Mariusz Jurasik | Poland | Handball | 2008 Summer | |
| Paweł Juraszek | Swimming | 2016 Summer, 2020 Summer | |
| Bogdan Juratoni | Romania | Boxing | 2012 Summer | |
| Oxana Juravel | Moldova | Athletics | 2008 Summer | |
| Anastasiya Juravleva | Uzbekistan | 2004 Summer, 2008 Summer, 2012 Summer | |
| Oleg Juravlyov | 2000 Summer, 2008 Summer | |
| Nicolae Juravschi | Soviet Union, Romania, Moldova | Canoe sprint | 1988 Summer, 1992 Summer, 1996 Summer | |
| Marine Jurbert | France | Trampolining | 2016 Summer | |
| Valeriu Jurcă | Romania | Athletics | 1964 Summer | |
| Gordana Jurcan | Croatia | Volleyball | 2000 Summer | |
| Damir Jurčević | Cross country skiing | 2002 Winter, 2006 Winter | |
| Milan Jurčina | Slovakia | Ice hockey | 2006 Winter, 2010 Winter, 2014 Winter | |
| Rūdolfs Jurciņš | Latvia | Basketball | 1936 Summer | |
| Matej Jurčo | Slovakia | Road cycling | 2004 Summer, 2008 Summer | |
| Tomáš Jurčo | Ice hockey | 2014 Winter, 2022 Winter | |
| Petra Jurčová | 2010 Winter | |
| Victoria Jurczok | Germany | Sailing | 2016 Summer | |
| Magdalena Jurczyk | Poland | Volleyball | 2024 Summer | |
| Vítězslav Jureček | Czechoslovakia | Biathlon | 1984 Winter | |
| Bartosz Jurecki | Poland | Handball | 2008 Summer, 2016 Summer | |
| Marcin Jurecki | Wrestling | 2000 Summer | |
| Michał Jurecki | Handball | 2008 Summer, 2016 Summer | |
| Eszter Jurek | Hungary | Figure skating | 1952 Winter | |
| Kazimierz Jurek | Poland | Ice hockey | 1992 Winter | |
| Miroslav Jurek | Czechoslovakia | Athletics | 1960 Summer | |
| Adam Juretzko | Germany | Wrestling | 2000 Summer | |
| Eline Jurg | Netherlands | Bobsleigh | 2002 Winter, 2006 Winter | |
| Beth Jurgeleit | New Zealand | Field hockey | 2004 Summer, 2008 Summer | |
| Arvīds Jurgens | Latvia | Football, Ice hockey | 1924 Summer, 1936 Winter | |
| Emile Jurgens [ Wikidata ] | Netherlands | Shooting | 1912 Summer, 1920 Summer | |
| Franciscus Jurgens | 1920 Summer | |
| Maarten Jurgens | Equestrian eventing | 1972 Summer | |
| Oto Jurģis | Latvia | Athletics | 1936 Summer | |
| Frank Juric | Australia | Football | 1996 Summer | |
| Peter Juric | Austria | Cross country skiing | 1984 Winter | |
| Darko Juričić | Croatia | Athletics | 2000 Summer | |
| Rudolf Juřícký | Czechoslovakia | Track cycling | 1992 Summer | |
| Vid Juricskay | Australia | Canoe sprint | 1964 Summer | |
| Pavle Jurina | Yugoslavia | Handball | 1980 Summer, 1984 Summer | |
| Jaan Jüris | Estonia | Ski jumping | 2002 Winter, 2006 Winter | |
| Filip Jurišić [ Wikidata ] | Croatia | Sailing | 2024 Summer | |
| Vice Jurišić | Yugoslavia | Rowing | 1936 Summer | |
| Peeter Jürisson [ Wikidata ] | Estonia | Shooting | 2024 Summer | |
| Aija Jurjāne | Latvia | Basketball | 2008 Summer | |
| Franjo Jurjević | Yugoslavia | Artistic gymnastics | 1952 Summer | |
| Aleksejs Jurjevs | Latvia | Road cycling | 1936 Summer | |
| Jakub Jurka | Czech Republic | Fencing | 2020 Summer, 2024 Summer | |
| Jaroslav Jurka | Czechoslovakia | 1976 Summer, 1980 Summer | |
| Dmitrijs Jurkevičs | Latvia | Athletics | 2012 Summer | |
| Andrzej Jurkiewicz | Poland | Art competitions | 1948 Summer | |
| Anna Jurkiewicz | Figure skating | 2010 Winter | |
| Edward Jurkiewicz | Basketball | 1968 Summer | |
| Jan Jurkiewicz [ Wikidata ] | Fencing | 2024 Summer | |
| Mariusz Jurkiewicz | Handball | 2016 Summer | |
| Peter Jurko | Czechoslovakia | Alpine skiing | 1988 Winter, 1992 Winter | |
| Jarmila Jurkovičová | Czech Republic | Athletics | 2004 Summer, 2008 Summer, 2012 Summer | |
| Jean-Marc Jurkovitz | France | Volleyball | 1988 Summer | |
| Katarzyna Jurkowska-Kowalska | Poland | Artistic gymnastics | 2016 Summer | |
| Kenneth Jurkowski | United States | Rowing | 2008 Summer, 2012 Summer | |
| Arūnas Jurkšas | Lithuania | Athletics | 2000 Summer | |
| Darja Jurlova | Estonia | Biathlon | 2014 Winter | |
| Roger Jurriens | Aruba | Sailing | 1992 Summer | |
| František Jursa | Czechoslovakia | Road cycling, Track cycling | 1956 Summer | |
| Janez Jurše | Slovenia | Rowing | 2008 Summer | |
| Jernej Jurše | 2008 Summer | |
| Anna Jurt | Switzerland | Modern pentathlon | 2024 Summer | |
| Helfried Jurtschitsch | Austria | Rowing | 2000 Summer | |
| Kim Ju-ryong | South Korea | Athletics | 1984 Summer | |
| Radek Juška | Czech Republic | 2016 Summer, 2024 Summer | |
| Žanna Juškāne | Latvia | Biathlon | 2010 Winter, 2014 Winter | |
| Adas Juškevičius | Lithuania | Basketball | 2016 Summer | |
| Gytis Juškevičius | Boxing | 1992 Summer | |
| Andrzej Juskowiak | Poland | Football | 1992 Summer | |
| Jerzy Juskowiak | Athletics | 1960 Summer | |
| Bertel Juslén | Finland | Sailing | 1912 Summer | |
| Otgonbayaryn Jüslen [ Wikidata ] | Mongolia | Judo | 2024 Summer | |
| Sigurd Juslén | Finland | Sailing | 1912 Summer | |
| Jasrin Jusron | Indonesia | Football | 1956 Summer | |
| Carita Jussila | Finland | Archery | 1980 Summer | |
| Esko Jussila | Nordic combined | 1956 Winter | |
| Risto Jussilainen | Ski jumping | 2002 Winter, 2006 Winter | |
| Elijah Just | New Zealand | Football | 2020 Summer | |
| Jaroslav Just | Bohemia, Czechoslovakia | Tennis | 1912 Summer, 1920 Summer | |
| Paul Just | Canada | Athletics | 1988 Summer | |
| Theodore Just | Great Britain | 1908 Summer | |
| Tom Just | New Zealand | Rowing | 1968 Summer | |
| Mathieu Justafre | France | Snowboarding | 2002 Winter | |
| Aage Justesen | Denmark | Speed skating | 1948 Winter | |
| Lise Justesen | Rowing | 1980 Summer, 1984 Summer | |
| Ole Justesen | Shooting | 1972 Summer, 1980 Summer, 1992 Summer | |
| Poul Justesen | Rowing | 1960 Summer | |
| Ina Justh | Germany | 1996 Summer | |
| Andrew Justice | Great Britain | 1976 Summer, 1980 Summer | |
| Edward Justice [ Wikidata ] | Artistic gymnastics | 1908 Summer | |
| George Justicz | Rowing | 1960 Summer | |
| George Justinian | Romania | Ice hockey | 1976 Winter, 1980 Winter | |
| Pablo Justiniani | Panama | Weightlifting | 1976 Summer | |
| Hélio Justino | Brazil | Handball | 2004 Summer, 2008 Summer | |
| Maryse Justin-Pyndiah | Mauritius | Athletics | 1988 Summer | |
| Calvyn Justus | South Africa | Swimming | 2016 Summer | |
| Julian Justus | Germany | Shooting | 2012 Summer, 2016 Summer | |
| Klaus-Peter Justus | East Germany | Athletics | 1972 Summer | |
| Steffen Justus | Germany | Triathlon | 2012 Summer | |
| Fahrudin Jusufi | Yugoslavia | Football | 1960 Summer | |
| Katarzyna Juszczak | Poland, Italy | Judo, Wrestling | 1992 Summer, 2004 Summer | |
| Piotr Juszczak | Poland | Rowing | 2012 Summer, 2016 Summer | |
| Zbigniew Juszczak | Field hockey | 1972 Summer | |
| Zbigniew Juszczak | 2000 Summer | |
| János Juszkó | Hungary | Road cycling | 1964 Summer | |
| Ariya Jutanugarn | Thailand | Golf | 2016 Summer, 2020 Summer | |
| István Jutasi | Hungary | Sailing | 1960 Summer | |
| Bernd Juterzenka | East Germany | Boxing | 1968 Summer | |
| Matti Jutila | Canada | Wrestling | 1964 Summer | |
| Timo Jutila | Finland | Ice hockey | 1984 Winter, 1992 Winter, 1994 Winter | |
| Arne Jutner | Sweden | Water polo | 1948 Summer, 1952 Summer | |
| Manon Jutras | Canada | Road cycling | 2004 Summer | |
| Jasmin Jüttner | Germany | Karate | 2020 Summer | |
| Jörg Jüttner | Athletics | 1964 Summer | |
| Jakob Jutz | Switzerland | 1948 Summer | |
| Bruno Jutzeler | Wrestling | 1972 Summer | |
| Peter Jutzeler | 1964 Summer, 1968 Summer | |
| Erling Juul | Norway | Athletics | 1920 Summer | |
| Christopher Juul-Jensen | Denmark | Road cycling | 2016 Summer, 2020 Summer | |
| Pekka Juutilainen | Finland | Athletics | 1964 Summer | |
| Jørgen Juve | Norway | Football | 1936 Summer | |
| James Juvenal | United States | Rowing | 1900 Summer, 1904 Summer | |
| Niilo Juvonen | Finland | Alpine skiing | 1952 Winter | |
| Wirimai Juwawo | Zimbabwe | Athletics | 2012 Summer, 2016 Summer | |
| Alberto Juzdado | Spain | 1996 Summer, 2000 Summer | |
| Martti Jylhä | Finland | Cross country skiing | 2014 Winter, 2018 Winter | |