Host cities:
| Athlete | Nation(s) | Sport(s) | Role(s) | Era | Notes |
|---|---|---|---|---|---|
| Estie Wittstock | ATH | Olympics | 2004 | 0–0–1 2003 Daegu ATH bronze: 400 m | |
| Urszula Włodarczyk | ATH | Olympics | 1992—2000 | 1–1–0 1991 Sheffield ATH silver: heptathlon; 1993 Buffalo ATH gold: heptathlon | |
| Kelsey Wog | SWM | Olympics / YOG | 2014—2024 | 1–0–0 2017 Taipei SWI gold: 4×100 m freestyle relay (swam in heats only) | |
| Ziemek Wojciechowski | FEN | Olympics | 1976 | 0–2–0 1970 Torino FEN silver: foil team; 1973 Moskva FEN silver: foil team | |
| Krzysztof Wojdan | JUD | Olympics | 1996 | 0–0–1 1995 Fukuoka JUD bronze: team | |
| Artur Wojdat | SWM | Olympics | 1988—1992 | 1–1–1 1991 Sheffield SWI gold: 400 m freestyle, silver: 200 m freestyle; 1993 Buffalo SWI bronze: 4×100 m freestyle relay | |
| Ewelina Wojnarowska | CSP | Olympics | 2016 | 0–0–1 2013 Kazan CAN bronze: K4 500 m | |
| Łukasz Wójt | SWM | Olympics | 2008 | 0–0–1 2007 Bangkok SWI bronze: 200 m medley | |
| Władysław Wojtakajtis | SWM | Olympics | 1968—1972 | 0–0–1 1970 Torino SWI bronze: 1500 m freestyle | |
| Josh Wolff | FBL | Olympics | 2000 | 0–0–1 1997 Catania FTB bronze | |
| Barbara Wolnicka-Szewczyk | FEN | Olympics | 1992—2000 | 0–0–1 1991 Sheffield FEN bronze: foil team (competed as Barbara Wolnicka) | |
| Kara Wolters | BKB | Olympics | 2000 | 1–1–0 1995 Fukuoka BAS silver; 1997 Catania BAS gold | |
| Won Jeong-Sik | WLF | Olympics | 2012—2016 | 0–1–0 2011 Shenzhen WLT silver: lightweight -69 kg | |
| Won Yeong-Jun | SWM | Olympics | 2016 | 0–0–1 2017 Taipei SWI bronze: 50 m backstroke | |
| Angel Wong | GAR | Olympics | 2012 | 0–0–1 2011 Shenzhen GYM bronze: vault | |
| Panipak Wongpattanakit | TKW | Olympics / YOG | 2014—2024 | 2–0–0 2017 Taipei TKW gold: flyweight -49 kg; 2019 Napoli TKW gold: flyweight -49 kg | |
| Lynette Woodard | BKB | Olympics | 1984 | 1–0–0 1979 Ciudad de México BAS gold | |
| Rob Woodhouse | SWM | Olympics | 1984—1988 | 1–2–0 1985 Kobe SWI silver: 400 m medley; 1987 Zagreb SWI gold: 400 m medley, silver: 200 m medley | |
| Gavin Woods | WPO | Olympics | 2000—2012 | 0–0–1 2003 Daegu WAP bronze | |
| Bryan Woodward | ATH | Olympics | 2000 | 2–0–1 1995 Fukuoka ATH gold: 4×400 m relay (ran in heats only); 1997 Catania ATH gold: 4×400 m relay, bronze: 400 m | |
| Gabe Woodward | SWM | Olympics | 2004 | 0–0–1 1999 Palma de Mallorca SWI bronze: 4×100 m freestyle relay | |
| Witold Woyda | FEN | Olympics / Closing Flagbearer | 1960—1972 | 0–0–1 1961 Sofia FEN bronze: foil team | |
| Yvette Wray | ATH | Olympics | 1980 | 0–2–0 1979 Ciudad de México ATH silver: 4×100 m relay; 1981 București ATH silver: 4×100 m relay | |
| Neville Wright | BOB | Olympics | 2010—2018 | 0–0–1 2007 Bangkok ATH bronze: 100 m | |
| Peter Wright | SWM | Olympics | 1996 | 0–1–0 1991 Sheffield SWI silver: 400 m freestyle | |
| Thelma Wright | ATH | Olympics | 1972—1976 | 0–1–0 1975 Roma ATH silver: 3000 m | |
| Bernie Wrightson | DIV | Olympics | 1968 | 0–2–0 1965 Budapest DIV silver: 3 m springboard and platform | |
| Roman Wrocławski | WRE | Olympics | 1988 | 0–0–1 1981 București WRE bronze: Greco-Roman heavyweight -100 kg | |
| Sean Wroe | ATH | Olympics | 2008 | 2–1–1 2007 Bangkok ATH gold: 400 m, silver: 4×400 m relay; 2009 Beograd ATH gold: 4×400 m relay; 2011 Shenzhen ATH bronze: 400 m | |
| Jacek Wszoła | ATH | Olympics | 1976—1980 | 1–0–0 1977 Sofia ATH gold: high jump | |
| Wu Chia-Ying | SHO | Olympics | 2016—2024 | 0–0–1 2015 Gwangju SHO bronze: 10 m air pistol | |
| Wu Hanxiong | FEN | Olympics | 2004 | 2–1–0 2003 Daegu FEN gold: foil team; 2007 Bangkok FEN gold: foil, silver: foil team | |
| Wu Jingyu | TKW | Olympics / Olympic Flagbearer | 2008—2020 | 1–0–0 2005 İzmir TKW gold: finweight -47 kg | |
| Wu Mei-Ling | JUD | Olympics | 1992—1996 | 0–0–1 1995 Fukuoka JUD bronze: middleweight -66 kg | |
| Wu Minxia | DIV | Olympics / Olympic Flagbearer | 2004—2016 | 5–1–0 2003 Daegu DIV gold: 1m springboard, 3 m springboard, synchronized springboard, and team; 2005 İzmir DIV gold: 1m springboard, silver: 3 m springboard | |
| Wu Naiqun | BKB | Olympics | 1996 | 0–0–1 1993 Buffalo BAS bronze | |
| Wu Qinglong | BKB | Olympics | 1992—1996 | 0–0–1 1993 Buffalo BAS bronze | |
| Wu Qiuhua | FEN | Olympics | 1984 | 1–0–0 1983 Edmonton FEN gold: foil team | |
| Wu Tao | ATH | Olympics | 2004 | 1–0–0 2003 Daegu ATH gold: discus throw | |
| Volkmar Würtz | FEN | Olympics | 1964 | 0–0–1 1961 Sofia FEN bronze: épée team | |
| Patrycja Wyciszkiewicz | ATH | Olympics | 2012—2016 | 1–0–0 2017 Taipei ATH gold: 4×400 m relay | |
| Wendy Wyland | DIV | Olympics | 1984 | 0–1–0 1983 Edmonton DIV silver: platform | |
| Barbara Wysoczańska | FEN | Olympics | 1976—1980 | 0–0–1 1973 Moskva FEN bronze: foil team (competed as Barbara Szeja) | |
| Xia Jiaping | TEN | Olympics | 1992—1996 | 1–0–0 1991 Sheffield TEN gold: singles | |
| Xian Dongmei | JUD | Olympics | 2004—2008 | 2–0–0 2001 Beijing JUD gold: half-lightweight -52 kg and team | |
| Xiao Aihua | FEN | Olympics | 1988—2000 | 0–2–4 1989 Duisburg FEN bronze: foil team; 1991 Sheffield FEN silver: foil and foil team; 1995 Fukuoka FEN bronze: foil team; 1997 Catania FEN bronze: foil; 1999 Palma de Mallorca FEN bronze: foil | |
| Xiao Hailiang | DIV | Olympics | 1996—2000 | 1–0–0 1997 Catania DIV gold: platform | |
| Xiao Yanling | ATH | Olympics | 1996 | 1–0–0 1991 Sheffield ATH gold: discus throw | |
| Xie Yongjun | FEN | Olympics | 2004 | 0–1–0 2003 Daegu FEN silver: épée team | |
| Xing Aowei | GAR | Olympics | 2000—2004 | 1–2–0 2001 Beijing GYM gold: team, silver: horizontal bar and pommelled horse | |
| Xiong Ni | DIV | Olympics / Olympic Flagbearer | 1988—2008 | 2–0–0 1993 Buffalo DIV gold: 3 m springboard and platform | |
| Xu Chen | BDM | Olympics | 2012—2016 | 0–1–0 2007 Bangkok BDM silver: team | |
| Xu Guoqing | JUD | Olympics | 1984—1988 | 0–1–0 1985 Kobe JUD silver: open class | |
| Xu Tianlongzi | SWM | Olympics | 2008 | 0–1–0 2009 Beograd SWI silver: 50 m backstroke | |
| Xu Xiaolong | ATH | Olympics | 2016 | 0–0–1 2015 Gwangju ATH bronze: triple jump | |
| Xu Xin | TTE | Olympics | 2016—2020 | 4–0–0 2009 Beograd TTN gold: team; 2011 Shenzhen TTN gold: singles, doubles, and team | |
| Xu Yanwei | SWM | Olympics | 2004—2008 | 2–3–2 2003 Daegu SWI gold: 4×200 m freestyle relay and 4×100 m medley relay, silver: 100 m freestyle, bronze: 4×100 m freestyle relay; 2007 Bangkok SWI silver: 4×100 m freestyle relay and 4×200 m freestyle relay, bronze: 100 m butterfly | |
| Xue Cuilan | BKB | Olympics | 1988 | 0–0–1 1987 Zagreb BAS bronze | |
| Bohdan Yadov | JUD | Olympics / YOG | 2014—2024 | 0–0–1 2015 Gwangju JUD bronze: team | |
| Kanae Yagi | WLF | Olympics | 2012—2020 | 1–0–0 2013 Kazan WLT gold: featherweight -53 kg | |
| Andriy Yahodka | FEN | Olympics | 2016 | 3–0–0 2007 Bangkok FEN gold: sabre team; 2011 Shenzhen FEN gold: sabre and sabre team | |
| Iryna Yakaltsevich-Zhuk | ATH | Olympics / YOG | 2010—2020 | 1–0–0 2017 Taipei ATH gold: pole vault (competed as Irina Zhuk) | |
| Aleksey Yakimenko | FEN | Olympics | 2004—2016 | 5–0–1 2001 Beijing FEN gold: sabre team; 2003 Daegu FEN gold: sabre team; 2005 İzmir FEN gold: sabre and sabre team; 2007 Bangkok FEN gold: sabre, bronze: sabre team | |
| Nataliya Yakovleva | SWM | Olympics | 1992 | 1–0–1 1991 Sheffield SWI gold: 4×200 m freestyle relay, bronze: 4×100 m medley relay (competed for the Soviet Union) | |
| Nadezhda Yakubovich | ATH | Olympics | 1976 | 2–0–0 1975 Roma ATH gold: javelin throw; 1977 Sofia ATH gold: javelin throw | |
| Kanae Yamabe | JUD | Olympics | 2016 | 2–1–0 2009 Beograd JUD gold: team, silver: open class; 2011 Shenzhen JUD gold: team | |
| Sachiko Yamada | SWM | Olympics | 2000—2004 | 1–1–2 2001 Beijing SWI gold: 1500 m freestyle, silver: 4×200 m freestyle relay, bronze: 400 m freestyle and 800 m freestyle | |
| Ryota Yamagata | ATH | Olympics / Athlete Oath Taker | 2012—2020 | 0–2–0 2013 Kazan ATH silver: 100 m and 4×100 m relay | |
| Misaki Yamaguchi | SWM | Olympics | 2008—2016 | 0–1–0 2009 Beograd SWI silver: 4×100 m freestyle relay | |
| Yuki Yamaguchi | ATH | Olympics | 2004 | 0–1–1 2005 İzmir ATH silver: 4×400 m relay, bronze: 400 m | |
| Takeshi Yamakage | SWM | Olympics | 1964 | 0–0–1 1965 Budapest SWI bronze: 4×200 m freestyle relay | |
| Mayuka Yamamoto | SWM | YOG | 2018 | 0–1–0 2019 Napoli SWI silver: 4×100 m freestyle relay | |
| Seito Yamamoto | ATH | Olympics | 2012—2020 | 0–1–0 2013 Kazan ATH silver: pole vault | |
| Takahiro Yamamoto | VVO | Olympics | 2008 | 0–1–0 1999 Palma de Mallorca VOL silver | |
| Kazuya Yamamura | FBL | Olympics | 2012 | 1–0–1 2009 Beograd FTB bronze; 2011 Shenzhen FTB gold | |
| Kota Yamamura | VVO | Olympics | 2008 | 0–1–0 2003 Daegu VOL silver | |
| Eri Yamanoi | SWM | Olympics | 1996 | 2–1–2 1997 Catania SWI gold: 400 m freestyle and 4×100 m medley relay, bronze: 800 m freestyle; 2001 Beijing SWI silver: 4×200 m freestyle relay, bronze: 4×100 m freestyle relay | |
| Hiroko Yamashita | ATH | Olympics | 1972 | 0–0–1 1970 Torino ATH bronze: long jump | |
| Mayumi Yamashita | JUD | Olympics | 2000 | 0–1–0 1999 Palma de Mallorca JUD silver: open class | |
| Kyoji Yamawaki | GAR | Olympics | 1984 | 1–2–1 1979 Ciudad de México GYM gold: horse vault, silver: floor and team, bronze: rings | |
| Kazuhiko Yamazaki | ATH | Olympics | 1992—2000 | 1–0–0 1995 Fukuoka ATH gold: 400 m hurdles | |
| Yan Jiankui | ATH | Olympics | 1996 | 1–0–0 2001 Beijing ATH gold: 4×100 m relay | |
| Yan Jing | FEN | Olympics | 1996 | 0–1–0 1995 Fukuoka FEN silver: épée team | |
| Yan Ming | SWM | Olympics | 1988—1992 | 0–0–1 1987 Zagreb SWI bronze: 800 m freestyle | |
| Dmytro Yanchuk | CSP | Olympics | 2016—2020 | 1–1–0 2013 Kazan CAN gold: C4 1000 m, silver: C4 500 m | |
| Galina Yaneva | GAR | Olympics | 1976 | 0–0–1 1977 Sofia GYM bronze: team | |
| Yang Ha-Eun | TTE | Olympics / YOG | 2010—2016 | 0–0–3 2015 Gwangju TTN bronze: singles, doubles, and team | |
| Yang Hak-Seon | GAR | Olympics | 2012—2020 | 1–1–0 2013 Kazan GYM gold: vault; 2015 Gwangju GYM silver: team | |
| Yang Haoran | SHO | Olympics / YOG | 2014—2020 | 3–1–1 2015 Gwangju SHO gold: 50 m rifle three positions, 10 m air rifle team, and 50 m rifle three positions team, silver: 10 m air rifle, bronze: 50 m rifle prone | |
| Yang Heng-Wei | TTE | YOG | 2014 | 0–1–1 2015 Gwangju TTN bronze: team; 2019 Napoli TTN silver: team | |
| Yang Jinghui | DIV | Olympics | 2004 | 2–0–0 2003 Daegu DIV gold: synchronized platform and team | |
| Yang Jun | WPO | Olympics | 2008—2016 | 2–0–0 2009 Beograd WAP gold; 2011 Shenzhen WAP gold | |
| Yang Kun-Pi | SHO | Olympics | 2016—2024 | 1–1–0 2019 Napoli SHO gold: trap, silver: trap team | |
| Yang Mingxia | ATH | Olympics | 2008 | 0–2–0 2013 Kazan ATH silver: 20 km walk team; 2015 Gwangju ATH silver: 20 km walk team | |
| Yang Shaoqi | FEN | Olympics | 2000 | 2–1–1 1995 Fukuoka FEN silver: épée team; 1997 Catania FEN bronze: épée team; 2001 Beijing FEN gold: épée and épée team | |
| Yang Shu-Chun | TKW | Olympics | 2008—2012 | 0–2–0 2005 İzmir TKW silver: finweight -47 kg; 2009 Beograd TKW silver: flyweight -51 kg | |
| Yang Tae-Yeong | GAR | Olympics | 2004—2008 | 4–1–4 2001 Beijing GYM bronze: horse vault and team; 2003 Daegu GYM gold: all-around, parallel bars, rings, and team, silver: floor, bronze: vault snd horizontal bar | |
| Yang Wei | GAR | Olympics | 2000—2008 | 2–1–0 2001 Beijing GYM gold: all-around and team, silver: horse vault | |
| Yang Wenyi | SWM | Olympics | 1988—1992 | 1–0–0 1991 Sheffield SWI gold: 50 m freestyle | |
| Yang Yanqin | ATH | Olympics | 1984 | 0–1–0 1985 Kobe ATH silver: shot put | |
| Yang Yun | GAR | Olympics | 2000 | 1–0–0 2003 Daegu GYM gold: team | |
| Naphaswan Yangpaiboon | SHO | Olympics / Opening Flagbearer | 2012—2020 | 0–1–0 2015 Gwangju SHO silver: 25 m sporting pistol team | |
| Nevin Yanıt | ATH | Olympics | 2008—2012 | 1–1–0 2007 Bangkok ATH silver: 100 m hurdles; 2009 Beograd ATH gold: 100 m hurdles | |
| Kyoko Yano | FBL | Olympics | 2004—2012 | 0–1–0 2003 Daegu FTB silver | |
| Yao Chi-Ling | WLF | YOG | 2010 | 0–0–1 2017 Taipei WLT bronze: middle-heavyweight -75 kg | |
| Yao Ming | BKB | Olympics / Opening Flagbearer | 2000—2008 | 0–1–0 2001 Beijing BAS silver | |
| Vyacheslav Yarkin | WLF | YOG | 2014 | 0–1–0 2017 Taipei WLT silver: middleweight -77 kg | |
| Svitlana Yaromka | JUD | Olympics | 2016 | 0–0–1 2009 Beograd JUD bronze: heavyweight +78 kg | |
| Anatoly Yarosh | ATH | Olympics | 1980 | 0–1–0 1975 Roma ATH silver: shot put | |
| Hanna Yaroshchuk-Ryzhkova | ATH | Olympics | 2012—2024 | 1–1–0 2011 Shenzhen ATH gold: 400 m hurdles; 2013 Kazan ATH silver: 400 m hurdles | |
| Iryna Yarotska | GAR | Olympics | 2004 | 3–1–1 2003 Daegu GYM gold: all-around, floor, and balance beam, silver: team, bronze: uneven bars | |
| Denis Yartsev | JUD | Olympics | 2016 | 1–0–0 2011 Shenzhen JUD gold: lightweight -73 kg | |
| Ivan Yarygin | WRE | Olympics | 1972—1976 | 1–0–0 1973 Moskva WRE gold: freestyle heavyweight -100 kg | |
| Lyubov Yaskevich | SHO | Olympics | 2012 | 3–1–0 2011 Shenzhen SHO silver: 10 m air pistol team; 2013 Kazan SHO gold: 10 m air pistol, 10 m air pistol team, and 25 m sporting pistol team | |
| Viktor Yastrebov | ATH | Olympics | 2004—2008 | 0–1–0 2003 Daegu ATH silver: triple jump | |
| Noriaki Yasuda | ATH | Olympics | 1960 | 1–0–0 1959 Torino ATH gold: pole vault | |
| Hisato Yasui | SWM | Olympics | 1996 | 1–0–2 1995 Fukuoka SWI gold: 1500 m freestyle, bronze: 800 m freestyle; 1997 Catania SWI bronze: 400 m freestyle | |
| Gökhan Yavaşer | WRE | Olympics | 2004 | 0–0–1 2005 İzmir WRE bronze: freestyle light-heavyweight -84 kg | |
| Ye Chong | FEN | Olympics | 1988—2004 | 0–1–1 1993 Buffalo FEN bronze: foil team; 1995 Fukuoka FEN silver: foil team | |
| Ye Li | BKB | Olympics | 2004 | 1–0–0 2003 Daegu BAS gold | |
| Ye Qiuyu | TEN | YOG | 2014 | 2–0–1 2019 Napoli TEN gold: doubles and team, bronze: mixed doubles | |
| Ivan Yedeshko | BKB | Olympics | 1972—1976 | 1–1–0 1970 Torino BAS gold; 1973 Moskva BAS silver | |
| Yuliya Yefimova | SWM | Olympics | 2008—2020 | 4–0–0 2013 Kazan SWI gold: 50 m breaststroke, 100 m breaststroke, 200 m breaststroke, and 4×100 m medley relay | |
| Antonina Yefremova | ATH | Olympics | 2004—2008 | 1–0–1 2005 İzmir ATH bronze: 4×400 m relay; 2007 Bangkok ATH gold: 4×400 m relay | |
| Yana Yegoryan | FEN | Olympics / YOG | 2010—2016 | 0–0–1 2013 Kazan FEN bronze: sabre team | |
| Yuriy Yehoshyn | SWM | Olympics | 2004—2008 | 1–0–3 2003 Daegu SWI gold: 4×100 m medley relay, bronze: 100 m freestyle and 4×100 m freestyle relay; 2007 Bangkok SWI bronze: 4×100 m medley relay | |
| Leonid Yekimov | SHO | Olympics | 2008—2020 | 8–4–2 2007 Bangkok SHO gold: 10 m air pistol, 50 m free pistol, 25 m rapid fire pistol team, 25 m standard pistol team, and 50 m free pistol team, silver: 25 m rapid fire pistol and 10 m air pistol team, bronze: 25 m standard pistol; 2013 Kazan gold: 25 m standard pistol, 25 m rapid fire pistol team, and 50 m free pistol team, silver: 25 m rapid fire pistol and 25 m standard pistol team, bronze: 10 m air pistol team | |
| Yeo Beom-Gyu | FBL | Olympics | 1988 | 0–1–0 1987 Zagreb FTB silver | |
| Yeo Hong-Cheol | GAR | Olympics | 1992—2000 | 1–1–0 1991 Sheffield GYM gold: horse vault; 1993 Buffalo GYM silver: horse vault | |
| Andrey Yepishin | ATH | Olympics | 2004—2008 | 0–2–0 2003 Daegu ATH silver: 4×100 m relay; 2005 İzmir ATH silver: 100 m | |
| Arman Yeremyan | TKW | Olympics / Opening Flagbearer | 2012 | 0–0–3 2005 İzmir TKW bronze: lightweight -72 kg; 2007 Bangkok TKW bronze: welterweight -78 kg; 2009 Beograd TKW bronze: welterweight -78 kg | |
| Yernar Yerimbetov | GAR | Olympics | 2004 | 2–2–1 2003 Daegu GYM gold: vault and parallel bars, silver: all-around; 2005 İzmir GYM silver: parallel bars, bronze: vault | |
| Oksana Yermakova | FEN | Olympics | 1996—2004 | 1–1–0 1997 Catania FEN silver: épée team (competed for Russia); 1999 Palma de Mallorca FEN gold: épée (competed for Russia) | |
| Tamara Yerofieieva | GRY | Olympics | 2000 | 4–1–0 2001 Beijing RGY gold: individual, ball, hoop, and rope, silver: clubs | |
| Vasily Yershov | ATH | Olympics | 1976 | 1–0–0 1977 Sofia ATH gold: javelin throw | |
| Inna Yevseyeva | ATH | Olympics | 1988—1992 | 1–1–1 1989 Duisburg ATH bronze: 800 m (competed for the Soviet Union); 1991 Sheffield ATH gold: 800 m, silver: 4×400 m relay (competed for the Soviet Union) | |
| Yekaterina Yevseyeva | ATH | Olympics | 2008 | 0–1–0 2009 Beograd ATH silver: high jump | |
| Nadezhda Yevstyukhina | WLF | Olympics | 2008—2012 | 0–1–0 2013 Kazan WLT silver: middle-heavyweight -75 kg | |
| Lyudmila Yezhova-Grebenkova | GAR | Olympics | 2004—2008 | 2–1–1 2001 Beijing GYM gold: all-around and balance beam, silver: team, bronze: uneven bars (competed as Lyudmila Yezhova) | |
| Yi Jingqian | TEN | Olympics | 1996—2000 | 2–0–0 1993 Buffalo TEN gold: singles and doubles | |
| Yi Siling | SHO | Olympics | 2012—2016 | 2–0–0 2015 Gwangju SHO gold: 10 m air rifle team and 50 m rifle three positions team | |
| Alexandre Yokochi | SWM | Olympics | 1984—1992 | 1–1–0 1985 Kobe SWI silver: 200 m breaststroke; 1987 Zagreb SWI gold: 200 m breaststroke | |
| Saburo Yokomizo | ATH | Olympics | 1964 | 0–1–0 1959 Torino ATH silver: 5000 m | |
| Tadayoshi Yokota | VVO | Olympics | 1968—1976 | 1–0–0 1967 Tokyo VOL gold | |
| Isao Yoneda | GAR | Olympics | 2004 | 0–1–0 2001 Beijing GYM silver: team | |
| Shuichi Yoneshige | ATH | Olympics | 1988 | 1–0–2 1983 Edmonton ATH gold: 10000 m, bronze: 5000 m; 1985 Kobe ATH bronze: 10000 m | |
| Kazutomo Yoneyama | VVO | Olympics | 1988 | 1–0–0 1985 Kobe VOL gold | |
| Diana Yorgova | ATH | Olympics | 1964—1972 | 0–1–1 1961 Sofia ATH silver: long jump, bronze: 4×100 m relay | |
| Keisuke Yoshida | SWM | YOG | 2018 | 1–0–0 2019 Napoli SWI gold: 400 m freestyle | |
| Ryoichi Yoshida | ATH | Olympics | 1984—1988 | 0–0–1 1987 Zagreb ATH bronze: 400 m hurdles | |
| Saori Yoshida | WRE | Olympics / Torch Bearer / Opening Flagbearer / Closing Flagbearer | 2004—2020 | 1–0–0 2005 İzmir WRE gold: freestyle lightweight -55 kg | |
| Jo Yoshimi | SWM | Olympics | 1996 | 0–1–0 1995 Fukuoka SWI silver: 200 m medley | |
| Maharu Yoshimura | TTE | Olympics | 2016 | 0–1–0 2013 Kazan TTN silver: team | |
| Haruo Yoshimuta | SWM | Olympics | 1960—1964 | 6–0–0 1961 Sofia SWI gold: 200 m butterfly, 4×100 m freestyle relay, and 4×100 m medley relay; 1963 Porto Alegre SWI gold: 400 m freestyle, 1500 m freestyle, and 4×100 m freestyle relay | |
| Ken Yoshizawa | ATH | Olympics | 2004 | 0–0–1 2001 Beijing ATH bronze: 4×400 m relay | |
| Dannette Young | ATH | Olympics | 1988—1996 | 1–0–1 1987 Zagreb ATH gold: 4×100 m relay, bronze: 200 m | |
| Katrina Young | DIV | Olympics | 2016—2020 | 0–1–0 2013 Kazan DIV silver: team | |
| Aaron Younger | WPO | Olympics | 2012—2020 | 1–0–0 2009 Beograd WAP gold | |
| Yu Ai-Wen | SHO | Olympics | 2012—2024 | 1–0–0 2019 Napoli SHO gold: 10 m air pistol team | |
| Yu Dan | SHO | Olympics | 2012 | 1–1–1 2013 Kazan SHO gold: 50 m rifle three positions team, silver: 10 m air rifle, bronze: 10 m air rifle team | |
| Yu Guan-Lin | ARC | Olympics | 2016 | 0–1–0 2015 Gwangju ARC silver: recurve team | |
| Yu In-Tak | WRE | Olympics / Olympic Flagbearer | 1984—1988 | 0–1–0 1981 București WRE silver: freestyle lightweight -68 kg | |
| Yu Jin-Seon | TEN | Olympics | 1988 | 0–0–1 1985 Kobe TEN bronze: mixed doubles | |
| Kevin Yu | GLF | Olympics / YOG | 2014—2024 | 0–0–2 2017 Taipei GOL bronze: individual and team | |
| Yu Rui | SWM | Olympics | 2004 | 0–0–1 2001 Beijing SWI bronze: 200 m backstroke | |
| Yu Seong-Yeon | JUD | Olympics | 2000 | 0–0–1 1999 Palma de Mallorca JUD bronze: middleweight -90 kg | |
| Yu So-Jeong | HBL | Olympics / YOG | 2014—2016 | 0–1–0 2015 Gwangju HAN silver | |
| Yu Song | JUD | Olympics | 2016 | 0–1–0 2011 Shenzhen JUD silver: team | |
| Yu Wei | ATH | Olympics | 2016 | 1–0–0 2011 Shenzhen ATH gold: 20 km walk team | |
| Yu Won-Cheol | GAR | Olympics | 2008—2016 | 0–1–0 2005 İzmir GYM silver: team | |
| Yu Yeon-Seong | BDM | Olympics | 2012—2016 | 1–0–0 2007 Bangkok BDM gold: mixed doubles | |
| Yuan Chao | JUD | Olympics | 1996 | 0–0–1 1995 Fukuoka JUD bronze: half-middleweight -78 kg | |
| Yuan Hua | JUD | Olympics | 2000 | 4–0–0 1999 Palma de Mallorca JUD gold: heavyweight +78 kg and open class; 2001 Beijing JUD gold: heavyweight +78 kg and team | |
| Yuan Shu-Chi | ARC | Olympics | 2004—2008 | 0–1–1 2011 Shenzhen ARC silver: recurve mixed team, bronze: recurve team | |
| Kiyoo Yui | ATH | Olympics | 1964—1968 | 0–0–1 1967 Tokyo ATH bronze: 400 m hurdles | |
| Yun Mi-Jin | ARC | Olympics | 2000—2004 | 2–1–0 2003 Daegu ARC gold: recurve team, silver: recurve; 2005 İzmir ARC gold: recurve team | |
| Yun Yong-Il | TEN | Olympics | 1996—2000 | 3–0–0 1995 Fukuoka TEN gold: singles; 1997 Catania TEN gold: singles and doubles | |
| Latisha Chan | TEN | Olympics | 2008—2024 | 2–0–1 2017 Taipei TEN gold: doubles and team, bronze: mixed doubles | |
| Sniazhana Yurchanka | ATH | Olympics | 2008 | 0–0–1 2007 Bangkok ATH bronze: 20 km walk | |
| Aleh Yurenia | CSP | Olympics | 2012—2020 | 0–1–1 2013 Kazan CAN silver: K1 1000 m, bronze: K4 1000 m | |
| Lidziya Yurkauna | ATH | Olympics | 1996 | 0–1–0 1989 Duisburg ATH silver: 100 m hurdles (competed as Lidiya Okolo-Kulak for the Soviet Union) | |
| Volha Yurkina | GAR | Olympics | 1996 | 1–0–0 1995 Fukuoka GYM gold: floor | |
| Yury Yurkov | SHO | Olympics | 2008—2020 | 1–1–0 2007 Bangkok SHO gold: 50 m rifle three positions, silver: 50 m rifle three positions team | |
| Yekaterina Yusheva | FEN | Olympics | 2000—2004 | 0–0–3 1999 Palma de Mallorca FEN bronze: foil team; 2001 Beijing FEN bronze: foil and foil team | |
| Aliya Yusupova | GRY | Olympics | 2004—2008 | 0–0–4 2005 İzmir RGY bronze: ball; 2007 Bangkok RGY bronze: clubs; 2009 Beograd RGY bronze: individual and hoop | |
| Irina Zabludina | JUD | Olympics | 2012—2016 | 0–0–2 2007 Bangkok JUD bronze: team; 2013 Kazan JUD bronze: team | |
| Sergey Zabolotnov | SWM | Olympics | 1988 | 4–1–1 1981 București SWI gold: 100 m backstroke, 200 m backstroke, and 4×100 m medley relay; 1983 Edmonton SWI gold: 200 m backstroke; 1985 Kobe SWI silver: 4×100 m medley relay (swam in heats only), bronze: 100 m backstroke | |
| Filip Zaborowski | SWM | Olympics | 2016 | 0–0–1 2019 Napoli SWI bronze: 800 m freestyle | |
| Claudia Zaczkiewicz | ATH | Olympics | 1988 | 0–0–2 1989 Duisburg ATH bronze: 100 m hurdles and 4×100 m relay | |
| Ginka Zagorcheva | ATH | Olympics | 1988 | 1–0–1 1985 Kobe ATH gold: 100 m hurdles, bronze: 4×100 m relay | |
| Petra Záhonyi | FEN | YOG | 2014 | 0–1–0 2017 Taipei FEN silver: sabre team | |
| Anton Zakharov | DIV | Olympics | 2004—2012 | 0–0–1 2007 Bangkok DIV bronze: synchronized springboard | |
| Ilya Zakharov | DIV | Olympics | 2012—2016 | 4–2–2 2011 Shenzhen DIV silver: synchronized platform, bronze: 3 m springboard and team; 2013 Kazan DIV gold: synchronized springboard, silver: team; 2017 Taipei DIV gold: 3 m springboard, synchronized springboard, and team | |
| Nadezhda Zakharova | BKB | Olympics | 1976 | 1–0–0 1973 Moskva BAS gold | |
| Stella Zakharova | GAR | Olympics | 1980 | 1–2–2 1981 București GYM gold: horse vault, silver: all-around and team, bronze: floor and balance beam | |
| Katarzyna Żakowicz | ATH | Olympics | 2000 | 0–0–1 2001 Beijing ATH bronze: shot put | |
| Margherita Zalaffi | FEN | Olympics | 1984—2000 | 4–1–1 1985 Kobe FEN gold: foil team; 1989 Duisburg FEN gold: foil team; 1991 Sheffield FEN gold: foil team, silver: épée team, bronze: foil; 1993 Buffalo FEN gold: foil team | |
| Gergő Zalánki | WPO | Olympics | 2016—2024 | 1–0–0 2015 Gwangju WAP gold | |
| Svetlana Zalevskaya | ATH | Olympics | 1996—2000 | 0–1–0 1995 Fukuoka ATH silver: high jump | |
| Krystian Zalewski | ATH | Olympics | 2016 | 1–0–0 2017 Taipei ATH gold: 3000 m steeplechase |