Host cities:
| Athlete | Nation(s) | Sport(s) | Role(s) | Era | Notes |
|---|---|---|---|---|---|
| Jo Yong-Suk | SHO | Olympics | 2008—2016 | 1–0–1 2010 Guangzhou SHO gold: 25 m sporting pistol, bronze: 10 m air pistol | |
| Jo Yun-Jeong | TEN | Olympics | 2000—2004 | 0–1–2 1998 Bangkok TEN silver: doubles; 2002 Busan TEN bronze: singles and team | |
| Jo Yun-Mi | FBL | Olympics | 2012 | 1–1–0 2010 Guangzhou FBL silver; 2014 Incheon FBL gold | |
| Jo Yun-Ok | FBL | Olympics | 1964 | 0–1–0 1962 Jakarta FBL silver | |
| Jinson Johnson | ATH | Olympics | 2016 | 1–1–0 2018 Jakarta/Palembang ATH gold: 1500 m, silver: 800 m | |
| Jon Hyon-Ju | DIV | Olympics | 2004 | 0–1–0 2002 Busan DIV silver: synchronised platform | |
| Jon Myong-Hui | FBL | Olympics | 2008 | 1–0–0 2006 Doha FBL gold | |
| Jon Myong-Hwa | FBL | Olympics | 2012 | 1–1–0 2010 Guangzhou FBL silver; 2014 Incheon FBL gold | |
| Jong Chun-Mi | WLF | Olympics | 2012 | 0–0–1 2010 Guangzhou WLF bronze: lightweight -58 kg | |
| Jong Jo-Ung | BOX | Olympics | 1976—1980 | 1–0–0 1982 New Delhi BOX gold: lightweight -60 kg | |
| Jong Jo-Ung | BOX | Olympics | 1976—1980 | 1–0–0 1982 New Delhi BOX gold: lightweight -60 kg | |
| Jong Myong-Suk | WRE | Olympics | 2016 | 1–0–0 2018 Jakarta/Palembang WRE gold: freestyle lightweight -57 kg | |
| Jong Yon-Hui | SWA | Olympics | 2012 | 0–0–1 2014 Incheon SWA bronze: team | |
| Maneepong Jongjit | BDM | Olympics | 2012 | 0–0–1 2010 Guangzhou BDM bronze: team | |
| Somjit Jongjohor | BOX | Olympics / Closing Flagbearer | 2004—2008 | 1–1–0 2002 Busan BOX gold: flyweight -51 kg; 2006 Doha BOX silver: flyweight -51 kg | |
| Somjit Jongjohor | BOX | Olympics / Closing Flagbearer | 2004—2008 | 1–1–0 2002 Busan BOX gold: flyweight -51 kg; 2006 Doha BOX silver: flyweight -51 kg | |
| Samarn Jongsuk | SHO | Olympics | 1992 | 2–0–0 1998 Bangkok SHO gold: 10 m air rifle team and 50 m small-bore rifle prone team | |
| Praveen Jordan | BDM | Olympics | 2016—2020 | 0–0–1 2014 Incheon BDM bronze: mixed doubles | |
| Sini Jose | ATH | Non-starter | 2008 | 1–0–0 2010 Guangzhou ATH gold: 4×400 m relay | |
| Ahed Joughili | WLF | Olympics / Opening Flagbearer | 2008—2012 | 1–0–0 2006 Doha WLF gold: heavyweight -105 kg | |
| Ju Hyeon-Jeong | ARC | Olympics | 2008 | 1–0–0 2010 Guangzhou ARC gold: team | |
| Ju Jeong-Hyeon | EJP | Olympics | 2004 | 0–1–1 2006 Doha EJP silver: jumping team, bronze: jumping individual | |
| Ju Jong-Gwan | CSP | Olympics | 1992 | 0–1–1 1990 Beijing CSP silver: K4 1000 m, bronze: K4 500 m | |
| Ju Yeong-Sam | GAR | Olympics | 1984—1988 | 0–1–1 1986 Seoul GAR silver: team, bronze: pommelled horse | |
| Mahboub Jumaa Mubarak | FBL | Olympics | 1980 | 0–1–0 1982 New Delhi FBL silver | |
| Takanobu Jumonji | CTR | Olympics | 1996 | 0–1–0 1998 Bangkok CRD silver: 1000 m track time trial | |
| Khawaja Junaid | HOC | Olympics / Coach | 1992—2012 | 1–0–1 1990 Beijing HOC gold; 1994 Hiroshima HOC bronze | |
| Samresh Jung | SHO | Olympics | 2008 | 1–1–1 2006 Doha SHO gold: 25 m center fire pistol team, silver: 25 m standard pistol team; 2014 Incheon SHO bronze: 10 m air pistol team | |
| Sherali Juraev | JUD | Olympics | 2016 | 0–0–1 2018 Jakarta/Palembang JUD bronze: half-heavyweight -100 kg | |
| Vyacheslav Kabanov | SWM | Olympics | 1996 | 0–0–1 1994 Hiroshima SWM bronze: 4×100 m freestyle relay | |
| Ali Hassan Kadhum | ATH | Olympics | 1980 | 1–0–0 1978 Bangkok ATH gold: 400 m hurdles | |
| Yuki Kadono | WPO | Olympics | 2016 | 0–1–0 2014 Incheon WPO silver | |
| Kazuko Kadoya | BKB | Olympics | 1976 | 1–0–0 1974 Tehran BKB gold | |
| Taalaybek Kadyraliyev | BOX | Olympics | 2000 | 0–0–1 2002 Busan BOX bronze: bantamweight -54 kg | |
| Taalaybek Kadyraliyev | BOX | Olympics | 2000 | 0–0–1 2002 Busan BOX bronze: bantamweight -54 kg | |
| Siripon Kaewduang-Ngam | SAL | Olympics / YOG | 2010—2020 | 0–0–2 2014 Incheon SAL bronze: RS:One; 2018 Jakarta/Palembang SAL bronze: RS:X | |
| Adel Al-Kahham | HBL | Olympics | 1996 | 0–1–0 1998 Bangkok HBL silver | |
| Shingo Kai | WPO | Olympics | 1984 | 0–1–0 1982 New Delhi WPO silver | |
| Yasuhiro Kai | JUD | Olympics | 1992 | 1–0–0 1990 Beijing JUD gold: half-heavyweight -95 kg | |
| Ayumi Kaihori | FBL | Olympics / Non-starter | 2008—2012 | 1–1–0 2010 Guangzhou FBL gold; 2014 Incheon FBL silver | |
| Nobuyuki Kajitani | GAR | Olympics | 1984 | 0–2–0 1978 Bangkok GAR silver: team; 1982 New Delhi GAR silver: team | |
| Yoshihiko Kajiyama | BBL | Olympics | 2000 | 0–1–0 1998 Bangkok BSB silver | |
| Yoshihiko Kajiyama | BBL | Olympics | 2000 | 0–1–0 1998 Bangkok BSB silver | |
| Abdul Karim Kakahaji | WRE | Olympics | 1988 | 0–1–0 1986 Seoul WRE silver: Greco-Roman flyweight -52 kg | |
| Reika Kakiiwa | BDM | Olympics | 2012 | 0–0–1 2014 Incheon BDM bronze: team | |
| Fusako Kakumaru | DIV | Olympics | 1976 | 0–1–0 1970 Bangkok DIV silver: platform | |
| Keevan Raj Kali Kavandan | HOC | Olympics | 2000 | 0–0–1 2002 Busan HOC bronze | |
| Uran Kalilov | WRE | Olympics | 2000—2004 | 0–0–1 2002 Busan WRE bronze: Greco-Roman bantamweight -55 kg | |
| Danish Kalim | HOC | Olympics | 1996 | 0–0–1 1994 Hiroshima HOC bronze | |
| Kalimullah | HOC | Olympics | 1984 | 1–1–0 1982 New Delhi HOC gold; 1986 Seoul HOC silver | |
| Sholpan Kaliyeva | JUD | Olympics | 2004—2008 | 0–0–1 2002 Busan JUD bronze: half-lightweight -52 kg | |
| Dmitry Kaltenberger | CSP | Olympics | 2008 | 4–0–0 1998 Bangkok CSP gold: K2 500 m; 2002 Busan CSP gold: K2 500 m and K2 1000 m; 2006 Doha CSP gold: K2 500 m | |
| Takeo Kamachi | SHO | Olympics | 1968—1984 | 4–2–2 1966 Bangkok SHO gold: 30 m rapid-fire pistol; 1970 Bangkok SHO gold: 25 m rapid-fire pistol team and 50 m free pistol team; 1974 Tehran SHO gold: 25 m standard pistol team, bronze: 25 m rapid-fire pistol team; 1978 Bangkok SHO silver: 25 m rapid-fire pistol team and 25 m standard pistol team, bronze: 25 m rapid-fire pistol | |
| Hiroko Kamada | FEN | Olympics | 1976 | 1–1–0 1974 Tehran FEN gold: foil, silver: foil team | |
| Makoto Kamada | WRE | Olympics | 1972 | 0–0–1 1974 Tehran WRE bronze: freestyle light-heavyweight -90 kg | |
| Abubaker Ali Kamal | ATH | Olympics | 2008 | 1–1–0 2002 Busan ATH silver: 3000 m steeplechase; 2014 Incheon ATH gold: 3000 m steeplechase | |
| Hamdan Al-Kamali | FBL | Olympics | 2012 | 0–1–0 2010 Guangzhou FBL silver | |
| Fumio Kamamoto | ATH | Olympics | 1956 | 1–0–0 1951 New Delhi ATH gold: hammer throw | |
| Kunishige Kamamoto | FBL | Olympics | 1964—1968 | 0–0–1 1966 Bangkok FBL bronze | |
| Haziq Bin Kamaruddin | ARC | Olympics | 2012—2016 | 0–1–0 2014 Incheon ARC silver: team | |
| Masaru Kamata | ATH | Olympics | 1964 | 0–1–0 1958 Tokyo ATH silver: 4×100 m relay | |
| Shoji Kamata | BKB | Olympics | 1960 | 0–1–1 1958 Tokyo BKB bronze; 1962 Jakarta BKB silver | |
| Wandee Kameaim | WLF | Olympics | 2004—2008 | 0–2–0 2002 Busan WLF silver: lightweight -58 kg; 2006 Doha WLF silver: lightweight -58 kg | |
| Fathi Kamel | FBL | Olympics | 1980 | 0–1–0 1982 New Delhi FBL silver | |
| Youssef Saad Kamel | ATH | Olympics | 2004—2008 | 1–0–0 2006 Doha ATH gold: 800 m | |
| Hisao Kami | FBL | Olympics | 1964 | 0–0–1 1966 Bangkok FBL bronze | |
| Daiki Kamikawa | JUD | Olympics | 2012 | 0–0–1 2010 Guangzhou JUD bronze: heavyweight +100 kg | |
| Masakazu Kamimura | WRE | Olympics | 1984 | 0–1–0 1982 New Delhi WRE silver: freestyle lightweight -68 kg | |
| Yukio Kamimura | HOC | Olympics | 1968 | 0–0–1 1966 Bangkok HOC bronze | |
| Megumi Kamionobe | FBL | Non-starter | 2012 | 1–0–0 2010 Guangzhou FBL gold | |
| Yuichiro Kamiyama | CTR | Olympics | 1996—2000 | 2–1–0 1986 Seoul CRD silver: points race; 1998 Bangkok CRD gold: sprint; 2002 Busan CRD gold: sprint team | |
| Mehdi Kamrani | BKB | Olympics | 2008 | 0–1–2 2006 Doha BKB bronze; 2010 Guangzhou BKB bronze; 2014 Incheon BKB silver | |
| Somluck Kamsing | BOX | Olympics / Opening Flagbearer | 1992—2004 | 2–0–0 1994 Hiroshima BOX gold: featherweight -57 kg; 1998 Bangkok BOX gold: featherweight -57 kg | |
| Somluck Kamsing | BOX | Olympics / Opening Flagbearer | 1992—2004 | 2–0–0 1994 Hiroshima BOX gold: featherweight -57 kg; 1998 Bangkok BOX gold: featherweight -57 kg | |
| Chawalit Kamutchati | SHO | Olympics | 1972 | 1–1–1 1970 Bangkok SHO gold: 50 m standard rifle 3 positions team, silver: 10 m air rifle team; 1974 Tehran SHO bronze: 50 m standard rifle 3 positions team | |
| Masayoshi Kan | ATH | Olympics | 1992 | 1–0–0 1998 Bangkok ATH gold: 4×400 m relay | |
| Natalie Kan | SWM | Olympics / YOG | 2018—2024 | 0–0–1 2018 Jakarta/Palembang SWM bronze: 4×200 m freestyle relay (swam in heats only) | |
| Hideta Kanai | ATH | Olympics | 1964 | 0–0–1 1962 Jakarta ATH bronze: javelin throw | |
| Yutaka Kanai | ATH | Olympics | 1984 | 0–0–1 1986 Seoul ATH bronze: 5000 m | |
| Yusuke Kanamaru | JUD | Olympics | 2008 | 0–1–0 2002 Busan JUD silver: lightweight -73 kg | |
| Yoshihiko Kanatsu | FEN | Olympics | 1984—1988 | 0–0–2 1986 Seoul FEN bronze: sabre team; 1990 Beijing FEN bronze: sabre team | |
| Yoko Kando | SWM | Olympics | 1992 | 0–1–1 1990 Beijing SWM silver: 4×100 m medley relay, bronze: 100 m butterfly | |
| Hideo Kanekawa | BKB | Olympics | 1960 | 0–0–1 1958 Tokyo BKB bronze | |
| Masaaki Kaneko | WRE | Olympics | 1968 | 1–0–0 1966 Bangkok WRE gold: freestyle featherweight -63 kg | |
| Masaki Kaneko | SWM | Olympics | 2016 | 0–2–0 2018 Jakarta/Palembang SWM silver: 4×100 m medley relay (swam in heats only) and 4×100 m medley mixed relay (swam in heats only) | |
| Shohei Kaneko | ATH | Olympics | 1964 | 0–0–1 1962 Jakarta ATH bronze: discus throw | |
| Yutaka Kaneko | WRE | Olympics | 1960 | 4–0–0 1954 Manila WRE gold: freestyle welterweight -73 kg; 1958 Tokyo WRE gold: freestyle welterweight -73 kg; 1962 Jakarta WRE gold: freestyle welterweight -78 kg and Greco-Roman welterweight -78 kg | |
| Yuzo Kanemaru | ATH | Olympics | 2008—2016 | 1–2–0 2010 Guangzhou ATH silver: 400 m and 4×400 m relay; 2014 Incheon ATH gold: 4×400 m relay | |
| Katsuko Kanesaka | VVO | Olympics | 1976 | 1–0–0 1974 Tehran VVO gold | |
| Keita Kaneto | DIV | Olympics | 1988—1996 | 0–1–3 1986 Seoul DIV bronze: platform; 1990 Beijing DIV silver: team, bronze: platform; 1994 Hiroshima DIV bronze: platform | |
| Rie Kaneto | SWM | Olympics | 2008—2016 | 0–1–0 2014 Incheon SWM silver: 200 m breaststroke | |
| Kang Un-Ju | ARC | Olympics | 2016 | 0–1–0 2018 Jakarta/Palembang ARC silver: team | |
| Kang Yong-Gyun | WRE | Olympics | 1996—2000 | 0–2–0 1998 Bangkok WRE silver: Greco-Roman bantamweight -54 kg; 2002 Busan WRE silver: Greco-Roman bantamweight -55 kg | |
| Chinglensana Kangujam | HOC | Olympics | 2016 | 1–0–1 2014 Incheon HOC gold; 2018 Jakarta/Palembang HOC bronze | |
| Kao Chih-Kang | BBL | Olympics | 2004—2008 | 0–2–0 2002 Busan BSB silver; 2010 Guangzhou BSB silver | |
| Shigeo Kaoku | HOC | Olympics | 1964—1968 | 0–0–1 1966 Bangkok HOC bronze | |
| Lidiya Karamchakova | WRE | Olympics | 2004 | 0–1–0 2002 Busan WRE silver: freestyle flyweight -48 kg | |
| Akbar Kargar Jam | FBL | Olympics | 1972 | 1–0–0 1974 Tehran FBL gold | |
| Houshang Kargarnejad | WLF | Olympics | 1976 | 3–0–1 1970 Bangkok WLF bronze: heavyweight -110 kg; 1974 Tehran WLF heavyweight -110 kg gold: snatch, clean & jerk, and total | |
| Mahdi Karim | FBL | Olympics | 2004 | 0–0–1 2014 Incheon FBL bronze | |
| Alireza Karimi | WRE | Olympics | 2016 | 1–0–0 2018 Jakarta/Palembang WRE gold: freestyle heavyweight -97 kg | |
| Nurzhan Karimzhanov | BOX | Olympics | 2000—2004 | 1–0–0 2002 Busan BOX gold: light-welterweight -63.5 kg | |
| Nurzhan Karimzhanov | BOX | Olympics | 2000—2004 | 1–0–0 2002 Busan BOX gold: light-welterweight -63.5 kg | |
| Ayumi Karino | SBL | Olympics | 2008 | 2–0–0 2006 Doha SOF gold; 2010 Guangzhou SOF gold | |
| Dmitry Karpov | ATH | Olympics | 2004—2012 | 2–1–0 2002 Busan ATH silver: decathlon; 2006 Doha ATH gold: decathlon; 2010 Guangzhou ATH gold: decathlon | |
| Doszhan Kartikov | WRE | Olympics | 2016 | 0–0–1 2014 Incheon WRE bronze: Greco-Roman middleweight -75 kg | |
| Shunji Karube | ATH | Olympics | 1996—2000 | 2–0–0 1994 Hiroshima ATH gold: 400 m hurdles; 1998 Bangkok ATH gold: 4×400 m relay | |
| Shigeru Kasahara | WRE | Olympics | 1956 | 1–0–0 1954 Manila WRE gold: freestyle featherweight -62 kg | |
| Akihiro Kasamatsu | GAR | Olympics / Referee | 2000—2020 | 0–0–1 1998 Bangkok GAR bronze: team | |
| Obada Al-Kasbeh | BOX | Olympics | 2016—2024 | 0–0–1 2014 Incheon BOX bronze: lightweight -60 kg | |
| Obada Al-Kasbeh | BOX | Olympics | 2016—2024 | 0–0–1 2014 Incheon BOX bronze: lightweight -60 kg | |
| Rima Kashafutdinova | ATH | Olympics | 2016 | 0–0–1 2018 Jakarta/Palembang ATH bronze: 4×100 m relay (ran in heats only) | |
| Jafar Kashani | FBL | Olympics | 1972 | 1–0–0 1974 Tehran FBL gold | |
| Andrey Kashechkin | CRD | Olympics | 2004 | 0–0–1 2002 Busan CRD bronze: 4000 m pursuit team | |
| Hitomi Kashima | SWM | Olympics | 1996 | 0–0–2 1998 Bangkok SWM bronze: 100 m butterfly and 200 m butterfly | |
| Takehiro Kashima | GAR | Olympics | 2004—2008 | 0–0–2 2002 Busan GAR bronze: pommelled horse and team | |
| Joe Kashmiri | ATH | Olympics | 1964—1968 | 2–3–1 1966 Bangkok ATH silver: discus throw, bronze: shot put; 1970 Bangkok ATH silver: shot put and discus throw; 1974 Tehran ATH gold: shot put and discus throw | |
| Taweesak Kasiwat | SHO | Olympics | 1964—1968 | 1–1–0 1966 Bangkok SHO gold: 30 m rapid-fire pistol team, silver: 25 m centre fire pistol team | |
| Madek Kasman | WLF | Olympics | 1968 | 0–1–0 1970 Bangkok WLF silver: featherweight -60 kg | |
| Kyoko Kasuya | SWM | Olympics | 1992 | 0–2–1 1990 Beijing SWM silver: 100 m breaststroke and 4×100 m medley relay, bronze: 200 m breaststroke | |
| Vandana Katariya | HOC | Olympics | 2016—2020 | 0–1–1 2014 Incheon HOC bronze; 2018 Jakarta/Palembang HOC silver | |
| Hiroshi Katayama | FBL | Olympics | 1964—1968 | 0–0–1 1966 Bangkok FBL bronze | |
| Misako Katayama | ATH | Olympics | 1964 | 1–0–0 1966 Bangkok ATH gold: javelin throw | |
| Rie Katayama | MTB | Olympics | 2008—2012 | 0–0–1 2010 Guangzhou CRD bronze: mountainbike cross-country | |
| Takamitsu Katayama | WRE | Olympics | 1996—2000 | 0–1–1 1994 Hiroshima WRE bronze: Greco-Roman welterweight -74 kg; 1998 Bangkok WRE silver: Greco-Roman middleweight -76 kg | |
| Akemi Kato | HOC | Olympics | 2004—2012 | 0–1–2 2002 Busan HOC bronze; 2006 Doha HOC silver; 2010 Guangzhou HOC bronze | |
| Daisuke Kato | EVE | Olympics | 2000 | 1–1–1 2002 Busan EJP gold: Three-Day Event team, bronze: Three-Day Event individual; 2006 Doha EJP silver: Three-Day Event team | |
| Kiyomi Kato | WRE | Olympics | 1972 | 0–1–0 1970 Bangkok WRE silver: freestyle flyweight -52 kg | |
| Kiyomi Kato | VVO | Olympics | 1976 | 1–0–0 1974 Tehran VVO gold | |
| Masashi Kato | SWM | Olympics | 1988—1992 | 0–0–1 1990 Beijing SWM bronze: 1500 m freestyle | |
| Mineo Kato | WPO | Olympics | 1960—1964 | 2–0–0 1958 Tokyo WPO gold; 1962 Jakarta WPO gold | |
| Nobuya Kato | ATH | Olympics | 2016 | 1–0–0 2014 Incheon ATH gold: 4×400 m relay | |
| Takako Kato | BKB | Olympics | 1996 | 0–1–0 1994 Hiroshima BKB silver | |
| Tomoe Kato | FBL | Olympics | 2004—2008 | 0–1–2 1998 Bangkok FBL bronze (competed as Tomoe Sakai); 2002 Busan FBL bronze (competed as Tomoe Sakai); 2006 Doha FBL silver (competed as Tomoe Sakai) | |
| Yuka Kato | SWM | Olympics | 2008—2012 | 0–2–2 2006 Doha SWM bronze: 50 m butterfly; 2010 Guangzhou SWM silver: 50 m butterfly and 4×100 m medley relay, bronze: 100 m butterfly | |
| Kazuo Katsuramoto | WRE | Olympics | 1956 | 1–0–0 1954 Manila WRE gold: freestyle middleweight -79 kg | |
| Aleksey Katulevsky | BOX | Olympics | 2000 | 0–0–1 2002 Busan BOX bronze: light-heavyweight -81 kg | |
| Aleksey Katulevsky | BOX | Olympics | 2000 | 0–0–1 2002 Busan BOX bronze: light-heavyweight -81 kg | |
| Micha Kaufman | SHO | Olympics | 1976 | 1–2–0 1970 Bangkok SHO gold: 50 m small-bore rifle prone team, silver: 50 m small-bore rifle 3 positions team and 50 m standard rifle 3 positions team | |
| Gurmeet Kaur | ATH | Olympics | 2000 | 0–0–1 1998 Bangkok ATH bronze: javelin throw | |
| Khushbir Kaur | ATH | Olympics / YOG | 2010—2016 | 0–1–0 2014 Incheon ATH silver: 20 km walk | |
| Mandeep Kaur | ATH | Olympics | 2008 | 2–0–0 2010 Guangzhou ATH gold: 4×400 m relay; 2014 Incheon ATH gold: 4×400 m relay | |
| Manjit Kaur | ATH | Olympics | 2004—2008 | 3–1–0 2002 Busan ATH gold: 4×400 m relay; 2006 Doha ATH gold: 4×400 m relay, silver: 400 m; 2010 Guangzhou ATH gold: 4×400 m relay | |
| Navjot Kaur | HOC | Olympics | 2016—2020 | 0–1–1 2014 Incheon HOC bronze; 2018 Jakarta/Palembang HOC silver | |
| Hari Pal Kaushik | HOC | Olympics / Non-starter | 1956—1964 | 1–0–0 1966 Bangkok HOC gold | |
| Masatsugu Kawachi | BOX | Olympics | 2008 | 0–0–1 2014 Incheon BOX bronze: light-welterweight -64 kg | |
| Masatsugu Kawachi | BOX | Olympics | 2008 | 0–0–1 2014 Incheon BOX bronze: light-welterweight -64 kg | |
| Takayoshi Kawagoe | ATH | Olympics | 1972 | 0–1–0 1974 Tehran ATH silver: long jump | |
| Risako Kawai | WRE | Olympics | 2016—2020 | 0–0–1 2018 Jakarta/Palembang WRE bronze: freestyle middleweight -62 kg | |
| Naoko Kawakami | FBL | Olympics | 2004 | 0–0–1 2002 Busan FBL bronze | |
| Yuko Kawakami | ATH | Olympics | 1996—2000 | 1–0–0 1998 Bangkok ATH gold: 10000 m | |
| Sho Kawamoto | ATH | Olympics | 2016 | 0–0–1 2018 Jakarta/Palembang ATH bronze: 4×400 m relay (ran in heats only) | |
| Hideaki Kawamura | ATH | Olympics | 1996—2000 | 1–0–0 1998 Bangkok ATH gold: 400 m hurdles | |
| Kazuo Kawamura | HOC | Olympics | 1968 | 0–0–1 1970 Bangkok HOC bronze | |
| Motomi Kawamura | HO5/HOC | Olympics / YOG | 2014—2016 | 1–0–0 2018 Jakarta/Palembang HOC gold | |
| Kaori Kawanaka | ARC | Olympics | 2012—2016 | 0–0–2 2014 Incheon ARC bronze: team; 2018 Jakarta/Palembang ARC bronze: team | |
| Shigeko Kawanishi | SWM | Olympics | 1968—1972 | 1–2–0 1970 Bangkok SWM gold: 4×100 m freestyle relay, silver: 100 m freestyle and 200 m freestyle | |
| Shunichi Kawano | WRE | Olympics | 1960—1968 | 1–0–2 1962 Jakarta WRE gold: Greco-Roman middleweight -87 kg, bronze: freestyle middleweight -87 kg; 1966 Bangkok WRE bronze: freestyle light-heavyweight -97 kg | |
| Hiromi Kawasumi | ATH | Olympics | 1988 | 2–0–0 1982 New Delhi ATH gold: 4×400 m relay; 1986 Seoul ATH gold: 4×400 m relay | |
| Nahomi Kawasumi | FBL | Olympics | 2012 | 1–1–0 2010 Guangzhou FBL gold; 2014 Incheon FBL silver | |
| Shinsuke Kayama | SWM | Olympics | 1976 | 3–0–0 1978 Bangkok SWM gold: 100 m butterfly, 200 m butterfly, and 4×100 m medley relay | |
| Svetlana Kazanina | ATH | Olympics | 1996—2004 | 0–1–1 1998 Bangkok ATH silver: heptathlon, bronze: 4×400 m relay | |
| Vladimir Kazantsev | CSP | Olympics | 1996 | 2–3–1 1994 Hiroshima CSP gold: K4 1000 m, silver: K2 500 m, K2 1000 m, and K4 500 m; 1998 Bangkok CSP gold: K4 1000 m, bronze: K2 500 m | |
| Ali Asghar Kazemi | BOX | Non-starter | 1992 | 0–1–0 1990 Beijing BOX silver: light-heavyweight -81 kg | |
| Ali Asghar Kazemi | BOX | Non-starter | 1992 | 0–1–0 1990 Beijing BOX silver: light-heavyweight -81 kg | |
| Charnon Keanchan | ATH | Olympics | 1992 | 0–1–0 1994 Hiroshima ATH silver: 4×400 m relay | |
| Almat Kebispayev | WRE | Olympics | 2012—2016 | 0–1–1 2014 Incheon WRE bronze: Greco-Roman featherweight -59 kg; 2018 Jakarta/Palembang WRE silver: Greco-Roman welterweight -67 kg | |
| Mohammad Ibrahim Kederi | WRE | Olympics | 1960 | 0–0–1 1962 Jakarta WRE bronze: freestyle featherweight -63 kg | |
| Keng Po-Hsuan | BBL | Olympics | 2004 | 1–0–0 2006 Doha BSB gold | |
| Zhanarbek Kenzheyev | WRE | Olympics | 2004—2016 | 0–0–3 2006 Doha WRE bronze: Greco-Roman light-heavyweight -84 kg; 2010 Guangzhou WRE bronze: Greco-Roman light-heavyweight -84 kg; 2014 Incheon WRE bronze: Greco-Roman -80 kg | |
| Aynur Kerey | SWA | Olympics | 2008 | 0–0–2 2006 Doha SWA bronze: duet; 2010 Guangzhou SWA bronze: combination | |
| Virdhawal Khade | SWM | Olympics | 2008 | 0–0–1 2010 Guangzhou SWM bronze: 50 m butterfly | |
| Amir Reza Khadem Azgadhi | WRE | Olympics / Opening Flagbearer | 1988—2000 | 1–0–0 1994 Hiroshima WRE gold: freestyle middleweight -82 kg | |
| Rasoul Khadem Azgadhi | WRE | Olympics | 1992—1996 | 1–1–0 1990 Beijing WRE silver: freestyle lightweight -68 kg; 1994 Hiroshima WRE gold: freestyle light-heavyweight -90 kg | |
| Saleh Khadim | WLF | Olympics | 1992 | 0–1–0 1986 Seoul WLF silver: light-heavyweight -82.5 kg | |
| Vichai Khadpo | BOX | Olympics | 1988—1996 | 0–0–2 1990 Beijing BOX bronze: flyweight -51 kg; 1994 Hiroshima BOX bronze: flyweight -51 kg | |
| Vichai Khadpo | BOX | Olympics | 1988—1996 | 0–0–2 1990 Beijing BOX bronze: flyweight -51 kg; 1994 Hiroshima BOX bronze: flyweight -51 kg | |
| Nawaf Al-Khaldi | FBL | Non-starter | 2000 | 0–1–0 1998 Bangkok FBL silver | |
| Hajar Al-Khaldi | ATH | Olympics | 2016 | 1–0–0 2018 Jakarta/Palembang ATH gold: 4×100 m relay | |
| Noraseela Mohd Khalid | ATH | Olympics | 2012 | 0–0–1 2006 Doha ATH bronze: 400 m hurdles | |
| Saleh Khalifa | FBL | Olympics | 1984 | 0–1–1 1982 New Delhi FBL bronze; 1986 Seoul FBL silver | |
| Ahmed Khalil | FBL | Olympics | 2012 | 0–1–0 2010 Guangzhou FBL silver | |
| Igor Khalilov | WLF | Olympics | 1996—2004 | 0–2–1 1994 Hiroshima WLF bronze: super-heavyweight +108 kg; 1998 Bangkok WLF silver: super-heavyweight +105 kg; 2002 Busan WLF silver: super-heavyweight +105 kg | |
| Danil Khalimov | WRE | Olympics | 2004 | 0–1–0 2002 Busan WRE silver: Greco-Roman middleweight -74 kg | |
| Abdul Khaliq | ATH | Olympics | 1956—1960 | 2–2–1 1954 Manila ATH gold: 100 m, silver: 4×100 m relay; 1958 Tokyo ATH gold: 100 m, silver: 200 m, bronze: 4×100 m relay | |
| Khaliuny Boldbaatar | JUD | Olympics | 1992—1996 | 1–0–1 1994 Hiroshima JUD bronze: lightweight -71 kg; 1998 Bangkok JUD gold: lightweight -73 kg | |
| Murodzhon Khalmuratov | CRD | Olympics | 2012—2020 | 0–1–0 2018 Jakarta/Palembang CRD silver: individual road time trial | |
| Nawaf Al-Khamees | FBL | Non-starter | 1984 | 0–0–1 1982 New Delhi FBL bronze | |
| Aadam Khamis | ATH | Olympics | 2008 | 0–0–1 2006 Doha ATH bronze: 10000 m | |
| Ali Khamis | ATH | Olympics | 2016 | 2–0–1 2014 Incheon ATH gold: 400 m hurdles; 2018 Jakarta/Palembang ATH gold: 4×400 m mixed relay, bronze: 400 m | |
| Didar Khamza | JUD | Olympics | 2016—2020 | 1–1–0 2018 Jakarta/Palembang JUD gold: half-middleweight -81 kg, silver: team | |
| Abdul Haseem Khan | HOC | Olympics | 2012 | 1–1–0 2010 Guangzhou HOC gold; 2014 Incheon HOC silver | |
| Abdul Waheed Khan | HOC | Olympics | 1960 | 1–1–0 1962 Jakarta HOC gold; 1966 Bangkok HOC silver | |
| Ahmed Ali Khan | BOX | Olympics | 2004 | 0–1–0 2002 Busan BOX silver: middleweight -75 kg | |
| Ahmed Ali Khan | BOX | Olympics | 2004 | 0–1–0 2002 Busan BOX silver: middleweight -75 kg | |
| Ahmed Khan | FBL | Olympics | 1948—1952 | 1–0–0 1951 New Delhi FBL gold | |
| Anwar Ahmed Khan | HOC | Olympics | 1956—1964 | 2–0–0 1958 Tokyo HOC gold; 1962 Jakarta HOC gold | |
| Aslam Sher Khan | HOC | Olympics / Non-starter | 1972—1976 | 0–1–0 1974 Tehran HOC silver | |
| Babar Ali Khan | BOX | Olympics | 1984 | 0–1–0 1982 New Delhi BOX silver: flyweight -51 kg | |
| Babar Ali Khan | BOX | Olympics | 1984 | 0–1–0 1982 New Delhi BOX silver: flyweight -51 kg |