Host cities:
| Athlete | Nation(s) | Sport(s) | Role(s) | Era | Notes |
|---|---|---|---|---|---|
| Annette Klug | FEN | Olympics | 1988 | 0–1–0 1989 Duisburg FEN silver: foil team | |
| Oleksandr Klymenko | ATH | Olympics | 1992—1996 | 2–0–0 1991 Sheffield ATH gold: shot put (competed for the Soviet Union); 1993 Buffalo ATH gold: shot put (competed for Ukraine) | |
| Iryna Klymets | ATH | Olympics | 2016—2024 | 1–0–0 2019 Napoli ATH gold: hammer throw | |
| Svetlana Klyuka | ATH | Olympics | 2008 | 1–0–0 2005 İzmir ATH gold: 800 m | |
| Svetlana Klyukina | GAR | Olympics | 2008 | 0–1–0 2009 Beograd GYM silver: team | |
| Edina Knapek | FEN | Olympics | 2000—2016 | 1–0–0 1997 Catania FEN gold: foil team | |
| Andro Knego | BKB | Olympics | 1976—1984 | 0–1–0 1979 Ciudad de México BAS silver | |
| Alan Knipe | VVO | Coach | 2012 | 0–1–0 1991 Sheffield VOL silver | |
| Angelika Knipping | SWM | Olympics | 1984 | 1–0–0 1981 București SWI gold: 100 m breaststroke | |
| Silke Knoll | ATH | Olympics | 1988—1996 | 0–0–1 1989 Duisburg ATH bronze: 4×100 m relay (competed for West Germany) | |
| Anna Knoroz | ATH | Olympics | 1996 | 0–1–1 1991 Sheffield ATH silver: 4×400 m relay, bronze: 400 m hurdles (competed as Anna Chuprina for the Soviet Union) | |
| Jeremy Knowles | SWM | Olympics | 2000—2008 | 0–0–1 2003 Daegu SWI bronze: 200 m butterfly | |
| Linda Knowles | ATH | Olympics | 1964 | 0–1–0 1967 Tokyo ATH silver: high jump | |
| Marthe Koala | ATH | Olympics / Opening Flagbearer / Closing Flagbearer | 2012—2024 | 0–1–0 2019 Napoli ATH silver: heptathlon | |
| Kenji Kobase | SWM | Olympics | 2016 | 1–0–0 2011 Shenzhen SWI gold: 4×100 m medley relay (swam in heats only) | |
| Yuki Kobori | SWM | Olympics | 2012—2016 | 1–0–1 2017 Taipei SWI gold: 4×200 m freestyle relay, bronze: 4×100 m medley relay | |
| Hakan Koç | WRE | Olympics | 2008 | 0–1–0 2005 İzmir WRE silver: freestyle heavyweight -96 kg | |
| Alexander Koch | FEN | Olympics | 1992—1996 | 0–1–0 1993 Buffalo FEN silver: foil | |
| Marita Koch | ATH | Olympics | 1976—1980 | 1–0–0 1979 Ciudad de México ATH gold: 200 m | |
| Olga Kochneva | FEN | Olympics | 2016 | 0–1–1 2009 Beograd FEN silver: épée team, bronze: épée | |
| Flavius Koczi | GAR | Olympics | 2008—2012 | 3–0–3 2009 Beograd GYM gold: vault, bronze: parallel bars; 2011 Shenzhen GYM gold: floor and vault, bronze: pommelled horse and team | |
| Hans Koeleman | ATH | Olympics | 1984—1988 | 0–0–1 1985 Kobe ATH bronze: 3000 m steeplechase | |
| Marko Koers | ATH | Olympics | 1992—2000 | 1–0–0 1993 Buffalo ATH gold: 800 m | |
| Wilfried Koffi | ATH | Olympics | 2016 | 1–0–1 2013 Kazan ATH bronze: 100 m; 2015 Gwangju ATH gold: 200 m | |
| Junya Koga | SWM | Olympics | 2016 | 1–1–1 2007 Bangkok SWI silver: 50 m backstroke; 2009 Beograd gold: 50 m backstroke, bronze: 100 m backstroke | |
| Sarah Köhler | SWM | Olympics | 2016—2020 | 1–2–0 2017 Taipei SWI gold: 400 m freestyle, silver: 800 m freestyle and 1500 m freestyle | |
| Fabienne Kohlmann | ATH | Olympics | 2012—2016 | 0–0–1 2015 Gwangju ATH bronze: 800 m | |
| Carsten Köhrbrück | ATH | Olympics | 1992 | 0–0–1 1989 Duisburg ATH bronze: 4×400 m relay (competed for West Germany) | |
| Yoko Koikawa | SWM | Olympics | 1992 | 1–5–1 1993 Buffalo SWI silver: 100 m backstroke and 4×100 m medley relay, bronze: 200 m backstroke; 1995 Fukuoka SWI gold: 200 m backstroke, silver: 100 m backstroke, 4×200 m freestyle relay, and 4×100 m medley relay | |
| Isao Koizumi | VVO | Olympics | 1968 | 1–0–0 1967 Tokyo VOL gold | |
| Marek Kolbowicz | ROW | Olympics | 1996—2012 | 0–0–1 1993 Buffalo ROW bronze: quadruple sculls | |
| Lyudmila Kolchanova | ATH | Olympics | 2012 | 1–0–0 2005 İzmir ATH gold: long jump | |
| Ernő Kolczonay | FEN | Olympics | 1980—1992 | 2–0–1 1979 Ciudad de México FEN gold: épée and épée team; 1981 București FEN bronze: épée | |
| Olena Kolesnichenko | ATH | Olympics / YOG | 2010—2016 | 0–0–1 2017 Taipei ATH bronze: 400 m hurdles | |
| Svetlana Kolesnichenko | SWA | Olympics | 2016—2020 | 2–0–0 2013 Kazan SYN gold: duet and team | |
| Nikolay Kolesnikov | ATH | Olympics | 1976 | 2–0–0 1975 Roma ATH gold: 4×100 m relay; 1977 Sofia ATH gold: 4×100 m relay | |
| Nadezhda Kolesnikova-Ilyina | ATH | Olympics | 1972—1976 | 1–0–0 1973 Moskva ATH gold: 400 m (competed as Nadezhda Kolesnikova) | |
| Pavel Kolobkov | FEN | Olympics | 1988—2004 | 2–1–0 1991 Sheffield FEN gold: épée, silver: épée team (competed for the Soviet Union); 1995 Fukuoka FEN gold: épée (competed for Russia) | |
| Kinga Kołosińska | VBV | Olympics | 2016 | 0–1–0 2013 Kazan BVO silver | |
| Tatyana Kolpakova | ATH | Olympics | 1980 | 1–0–0 1981 București ATH gold: long jump | |
| Yuliya Koltunova | DIV | Olympics | 2004—2012 | 1–1–0 2013 Kazan DIV gold: platform, silver: synchronized platform | |
| Alina Komashchuk | FEN | Olympics / YOG / Opening Flagbearer | 2010—2024 | 0–1–0 2011 Shenzhen FEN silver: sabre team | |
| Rachel Komisarz | SWM | Olympics | 2004 | 1–3–1 2001 Beijing SWI gold: 4×200 m freestyle relay, silver: 400 m freestyle, 1500 m freestyle, and 50 m butterfly, bronze: 100 m butterfly | |
| Vera Komisova | ATH | Olympics | 1980 | 1–0–1 1979 Ciudad de México ATH gold: 4×100 m relay, bronze: 100 m hurdles | |
| Sergey Komissarov | SAL | Olympics | 2016—2020 | 0–0–1 2011 Shenzhen SAI bronze: Laser Standard | |
| Jelica Komnenović | BKB | Olympics | 1980—1984 | 1–0–1 1983 Edmonton BAS bronze; 1987 Zagreb BAS gold | |
| Nanthana Komwong | TTE | Olympics | 2000—2016 | 0–0–1 2007 Bangkok TTN bronze: singles | |
| Gennady Kondrashov | ATH | Olympics | 1968 | 1–2–0 1961 Sofia ATH silver: hammer throw; 1963 Porto Alegre ATH gold: hammer throw; 1965 Budapest ATH silver: hammer throw | |
| Nataliya Kondratyeva | JUD | Olympics | 2012 | 0–1–1 2007 Bangkok JUD silver: extra-lightweight -48 kg, bronze: team | |
| Yekaterina Kondratyeva | ATH | Olympics | 2004 | 1–1–0 2003 Daegu ATH gold: 4×400 m relay, silver: 200 m | |
| Gaoussou Koné | ATH | Olympics | 1964—1972 | 1–0–0 1967 Tokyo ATH gold: 100 m | |
| Kong Hye-Ok | FBL | Olympics | 2008 | 1–0–0 2003 Daegu FTB gold | |
| Hiroyuki Konishi | GAR | Olympics | 1988 | 0–0–1 1987 Zagreb GYM bronze: team | |
| Keitaro Konnai | SWM | Olympics | 1996 | 0–1–1 1999 Palma de Mallorca SWI silver: 100 m backstroke, bronze: 4×100 m medley relay | |
| Ilya Konovalov | ATH | Olympics | 1996—2004 | 0–0–1 1997 Catania ATH bronze: hammer throw | |
| Ferenc Konrád | WPO | Olympics | 1968—1976 | 1–0–0 1965 Budapest WAP gold | |
| János Konrád | SWM/WPO | Olympics / Coach | 1960—1992 | 2–1–1 1959 Torino WAP silver; 1961 Sofia WAP bronze; 1963 Porto Alegre WAP gold; 1965 Budapest WAP gold | |
| Svetlana Kopchikova | SWM | Olympics | 1988 | 3–0–0 1985 Kobe SWI gold: 200 m medley, 4×100 m freestyle relay, and 4×200 m freestyle relay | |
| Kerstin Köppen | ROW | Olympics | 1992—1996 | 0–0–1 1989 Duisburg ROW bronze: quadruple sculls | |
| Malwina Kopron | ATH | Olympics | 2016—2024 | 1–1–0 2017 Taipei ATH gold: hammer throw; 2019 Napoli ATH silver: hammer throw | |
| Yevgeny Koptelov | SWM | Olympics | 2016 | 4–0–1 2013 Kazan SWI gold: 4×100 m medley relay, bronze: 100 m butterfly; 2015 Gwangju SWI gold: 100 m butterfly, 200 m butterfly, and 4×100 m medley relay | |
| Salomé Kora | ATH/BOB | Olympics | 2016—2026 | 2–0–1 2017 Taipei ATH gold: 4×100 m relay, bronze: 100 m; 2019 Napoli ATH gold: 4×100 m relay | |
| Gennady Korban | WRE | Olympics | 1980 | 1–0–0 1973 Moskva WRE gold: Greco-Roman welterweight -74 kg | |
| Olga Korbut | GAR | Olympics | 1972—1976 | 5–0–1 1973 Moskva GYM gold: all-around, floor, uneven bars, balance beam, and team, bronze: horse vault | |
| Oleksandr Korchmid | ATH | Olympics | 2004—2008 | 1–0–1 2003 Daegu ATH gold: pole vault; 2005 İzmir ATH bronze: pole vault | |
| Dane Korica | ATH | Olympics | 1972 | 1–0–0 1973 Moskva ATH gold: 10000 m | |
| Mikheil Korkia | BKB | Olympics | 1972—1976 | 0–1–0 1973 Moskva BAS silver | |
| Csaba Körmöczi | FEN | Olympics | 1976 | 0–1–0 1970 Torino FEN silver: sabre team | |
| Aleksandr Kornelyuk | ATH | Olympics | 1972 | 0–0–1 1970 Torino ATH bronze: 4×100 m relay | |
| Ihor Korobchinskyi | GAR | Olympics | 1992—1996 | 1–0–1 1993 Buffalo GYM gold: floor, bronze: all-around (competed for Ukraine) | |
| Larisa Korobeynikova | FEN | Olympics | 2012—2020 | 1–2–0 2009 Beograd FEN silver: foil team; 2013 Kazan FEN gold: foil team, silver: foil | |
| Darya Korobova | SWA | Olympics | 2012 | 2–0–0 2013 Kazan SYN gold: team and team Free Routine Combination | |
| Ibolya Korodi | ATH | Olympics | 1980 | 0–0–1 1981 București ATH bronze: 4×400 m relay | |
| Mariya Koroleva | SWA | Olympics | 2012—2016 | 0–0–1 2013 Kazan SYN bronze: team | |
| Svetlana Korolyova-Babich | ATH | Olympics | 1972—1976 | 1–0–0 1973 Moskva ATH gold: javelin throw (competed as Svetlana Korolyova) | |
| Yuliya Korostylova | SHO | Olympics | 2004 | 1–0–2 2007 Bangkok SHO gold: 10 m air pistol team, bronze: 25 m sporting pistol team; 2011 Shenzhen SHO bronze: 10 m air pistol team | |
| Sergey Korotkikh | ROW | Olympics | 1992 | 0–1–0 1989 Duisburg ROW silver: eights | |
| Vladimir Korotkov | TEN | Non-Medal | 1968 | 1–0–0 1973 Moscow TEN gold: doubles | |
| Olga Korotkova | ATH | Non-starter | 1980 | 1–0–0 1979 Ciudad de México ATH gold: 4×100 m relay | |
| Maksym Korotun | JUD | Olympics | 2008 | 0–1–0 2007 Bangkok JUD silver: extra-lightweight -60 kg | |
| Yevgeny Korotyshkin | SWM | Olympics | 2004—2012 | 1–3–2 2003 Daegu SWI silver: 100 m butterfly and 4×100 m medley relay, bronze: 50 m butterfly; 2005 İzmir SWI silver: 50 m butterfly; 2007 Bangkok SWI gold: 4×100 m medley relay, bronze: 50 m butterfly | |
| Yekaterina Korshunova | SHO | Olympics | 2016 | 2–0–0 2013 Kazan SHO gold: 10 m air pistol team and 25 m sporting pistol team | |
| Dirk Korthals | SWM | Olympics | 1984 | 0–2–0 1985 Kobe SWI silver: 4×100 m freestyle relay and 4×200 m freestyle relay | |
| Sergey Koryazhkin | FEN | Olympics | 1988 | 2–1–0 1981 București FEN silver: sabre team; 1983 Edmonton FEN gold: sabre team; 1985 Kobe FEN gold: sabre team | |
| Paweł Korzeniowski | SWM | Olympics / Opening Flagbearer | 2004—2020 | 3–0–2 2005 İzmir SWI gold: 200 m butterfly; 2009 Beograd SWI gold: 200 m butterfly; 2011 Shenzhen SWI bronze: 100 m butterfly; 2013 Kazan SWI gold: 100 m butterfly, bronze: 200 m freestyle | |
| Robert Korzeniowski | ATH | Olympics / Closing Flagbearer | 1992—2004 | 2–0–0 1991 Sheffield ATH gold: 20 km; 1993 Buffalo ATH gold: 20 km | |
| Irina Korzhanenko | ATH | Olympics | 1996—2004 | 1–0–0 1997 Catania ATH gold: shot put | |
| Zdeněk Kos | BKB | Olympics | 1972—1980 | 0–0–1 1977 Sofia BAS bronze | |
| Robert Kościelniakowski | FEN | Olympics | 1988—1992 | 1–0–0 1989 Duisburg FEN gold: sabre team | |
| Yasuhiro Koseki | SWM | Olympics | 2016 | 1–1–0 2013 Kazan SWI gold: 100 m breaststroke, silver: 4×100 m medley relay | |
| Aleksandr Kosenkov | DIV | Olympics | 1976—1980 | 1–0–1 1977 Sofia DIV bronze: 3 m springboard; 1979 Ciudad de México DIV gold: 3 m springboard | |
| Rimma Koshelyova | ATH | Olympics | 1960 | 1–1–0 1961 Sofia ATH gold: 4×100 m relay, silver: 80 m hurdles | |
| Dmitry Kosov | ATH | Olympics | 1992—1996 | 0–1–1 1995 Fukuoka ATH silver: 4×400 m relay, bronze: 400 m (competed for Russia) | |
| Yekaterina Kostetskaya | ATH | Olympics | 2008—2012 | 1–1–0 2005 İzmir ATH gold: 4×400 m relay (ran in heats only); 2007 Bangkok ATH silver: 800 m | |
| Olena Kostevych | SHO | Olympics / Opening Flagbearer | 2004—2024 | 3–2–4 2007 Bangkok SHO gold: 10 m air pistol team, silver: 10 m air pistol, bronze: 25 m sporting pistol team; 2011 Shenzhen SHO gold: 25 m sporting pistol team, bronze: 10 m air pistol, 25 m sporting pistol, and 10 m air pistol team; 2013 Kazan gold: 25 m sporting pistol, silver: 25 m sporting pistol team | |
| Irina Kostyuchenkova | ATH | Olympics | 1988—1992 | 1–0–0 1987 Zagreb ATH gold: javelin throw (competed for the Soviet Union) | |
| Dietmar Koszewski | ATH | Olympics | 1992 | 1–0–0 1993 Buffalo ATH gold: 110 m hurdles | |
| Anatoly Koteshev | FEN | Olympics | 1972 | 1–0–0 1970 Torino FEN gold: foil team | |
| Olga Kotlyarova | ATH | Olympics / Non-starter | 1996—2004 | 1–1–0 1997 Catania ATH gold: 4×400 m relay, silver: 400 m | |
| Ditte Kotzian | DIV | Olympics | 2000—2008 | 0–2–1 2001 Beijing DIV silver: synchronized springboard; 2003 Daegu DIV silver: synchronized springboard, bronze: 3 m springboard | |
| Klaus Kotzmann | FEN | Olympics | 1980 | 0–0–1 1979 Ciudad de México FEN bronze: foil team | |
| Antonios Kounadis | ATH | Olympics | 1960 | 1–0–0 1959 Torino ATH gold: discus throw | |
| Igor Kovačević | WPO | Olympics | 2016 | 0–0–1 2009 Beograd WAP bronze | |
| Annamária Kovács-Tóth | ATH | Olympics | 1968 | 0–1–1 1965 Budapest ATH silver: pentathlon, bronze: 4×100 m relay (competed as Annamária Kovács) | |
| Attila Kovács | FEN | Olympics | 1964 | 4–0–1 1959 Torino FEN gold: sabre team; 1961 Sofia FEN gold: sabre team; 1963 Porto Alegre FEN gold: sabre team; 1965 Budapest FEN gold: sabre team, bronze: sabre | |
| Dusán Kovács | ATH | Olympics | 1996 | 0–0–2 1993 Buffalo ATH bronze: 400 m hurdles and 4×400 m relay | |
| Edit Kovács | FEN | Olympics | 1976—1988 | 0–0–1 1981 București FEN bronze: foil team | |
| Iván Kovács | FEN | Olympics | 1992—2008 | 1–1–1 1993 Buffalo FEN silver: épée team; 1995 Fukuoka FEN gold: épée team, bronze: épée | |
| Péter Kovács | GAR | Olympics | 1980 | 0–1–0 1979 Ciudad de México GYM silver: parallel bars | |
| Tamás Kovács | FEN | Olympics / Referee | 1968—1984 | 1–0–0 1965 Budapest FEN gold: sabre team | |
| Anastasiya Koval | GAR | Olympics | 2008 | 0–1–0 2011 Shenzhen GYM silver: team | |
| Viktoriya Koval | ARC | Olympics | 2008 | 0–3–1 2005 İzmir ARC silver: recurve team, bronze: recurve; 2009 Beograd ARC silver: recurve team and recurve mixed team | |
| Nazar Kovalenko | ATH | Olympics | 2012—2016 | 1–1–0 2013 Kazan ATH silver: 20 km walk team; 2015 Gwangju ATH gold: 20 km walk team | |
| Sergey Kovalenko | BKB | Olympics | 1968—1972 | 0–1–0 1973 Moskva BAS silver | |
| Ainārs Kovals | ATH | Olympics | 2008—2012 | 2–0–1 2005 İzmir ATH gold: javelin throw; 2007 Bangkok ATH bronze: javelin throw; 2009 Beograd ATH gold: javelin throw | |
| Nikolay Kovalyov | FEN | Olympics | 2008—2016 | 1–0–1 2007 Bangkok FEN bronze: sabre team; 2013 Kazan FEN gold: sabre team | |
| Csaba Köves | FEN | Olympics | 1992—2000 | 0–1–1 1991 Sheffield FEN silver: sabre; 1993 Buffalo FEN bronze: sabre team | |
| Jerzy Kowalewski | DIV | Olympics | 1960—1968 | 0–0–1 1965 Budapest DIV bronze: platform | |
| Takaharu Koyama | ATH | Olympics | 1972—1976 | 0–0–1 1970 Torino ATH bronze: 3000 m steeplechase | |
| Władysław Kozakiewicz | ATH | Olympics | 1976—1980 | 2–0–0 1977 Sofia ATH gold: pole vault; 1979 Ciudad de México ATH gold: pole vault | |
| Olga Kozakova | VVO | Olympics | 1976 | 2–0–0 1973 Moskva VOL gold; 1977 Sofia VOL gold | |
| Inha Kozhokhina | GRY | Olympics | 2004 | 1–2–2 2005 İzmir RGY silver: group 5 ribbons, bronze: group and group 2 clubs + 3 hoops; 2007 Bangkok RGY gold: group 5 hoops, silver: group all-around | |
| Alina Kozich | GAR | Olympics | 2004—2008 | 0–1–0 2007 Bangkok GYM silver: team | |
| Lech Koziejowski | FEN | Olympics | 1972—1980 | 0–2–0 1973 Moskva FEN silver: foil team; 1977 Sofia FEN silver: foil team | |
| Yekaterina Kramarenko | GAR | Olympics | 2008 | 2–0–0 2015 Gwangju GYM gold: uneven bars and team | |
| Ivan Krapić | WPO | Olympics | 2016 | 0–1–0 2009 Beograd WAP silver | |
| Juttaporn Krasaeyan | ATH | Olympics | 2004 | 1–0–0 1995 Fukuoka ATH gold: shot put (competed as Wu Xianchun for China) | |
| Aleksandr Krasnov | CTR | Olympics | 1980 | 1–0–0 1983 Edmonton CYC gold: 4000 m individual pursuit | |
| Vladimir Krasnov | ATH | Olympics | 2012 | 2–0–0 2013 Kazan ATH gold: 400 m and 4×400 m relay | |
| Sergey Krasyuk | SWM | Olympics | 1980 | 2–2–0 1981 București SWI gold: 4×100 m medley relay, silver: 100 m freestyle and 4×100 m freestyle relay; 1983 Edmonton SWI gold: 4×100 m freestyle relay | |
| Angelika Kraus | SWM | Olympics | 1968—1972 | 0–0–1 1973 Moskva SWI bronze: 4×100 m medley relay | |
| Michael Kraus | SWM | Olympics | 1976 | 1–1–0 1977 Sofia SWI gold: 200 m butterfly; 1979 Ciudad de México SWI silver: 200 m butterfly | |
| Anzhela Kravchenko | ATH | Olympics / Non-starter | 2000—2004 | 0–1–0 1997 Catania ATH silver: 100 m | |
| Valery Kravchenko | VVO | Olympics | 1968—1972 | 1–0–0 1965 Budapest VOL gold | |
| Sergey Kravchuk | FEN | Olympics | 1992 | 1–0–0 1985 Kobe FEN gold: épée team (competed for the Soviet Union) | |
| Inesa Kravets | ATH | Olympics | 1988—1996 | 1–0–0 1991 Sheffield ATH gold: long jump (competed for the Soviet Union) | |
| Grzegorz Krawców | CSP | Olympics | 1988—1992 | 1–1–0 1987 Zagreb CAN gold: K4 500 m, silver: K4 1000 m | |
| Andrey Kraytor | CSP | Olympics | 2016 | 1–1–0 2013 Kazan CAN gold: C4 200 m, silver: C1 200 m | |
| Sejad Krdžalić | ATH | Olympics | 1984—1988 | 0–1–0 1987 Zagreb ATH silver: javelin throw | |
| Wolfgang Kreißig | ATH | Olympics | 1996—2000 | 0–1–0 1995 Fukuoka ATH silver: high jump | |
| Mitzi Kremer | SWM | Olympics | 1988 | 2–3–0 1987 Zagreb SWI gold: 100 m freestyle and 4×200 m freestyle relay, silver: 200 m freestyle, 400 m freestyle, and 4×100 m freestyle relay | |
| Nataliya Kresova-Rusakova | ATH | Olympics | 2004—2012 | 0–0–1 2003 Daegu ATH bronze: 100 m hurdles (competed as Nataliya Kresova) | |
| Yuliya Krevsun | ATH | Olympics | 2008—2012 | 1–0–0 2007 Bangkok ATH gold: 800 m | |
| Lothar Krieg | ATH | Olympics | 1976 | 0–0–1 1977 Sofia ATH bronze: 4×400 m relay | |
| Anatoli Krikun | BKB | Olympics | 1968 | 1–0–0 1970 Torino BAS gold | |
| Svetlana Krivelyova | ATH | Olympics | 1992—2004 | 1–0–0 1991 Sheffield ATH gold: shot put (competed for the Soviet Union) | |
| Andrey Krivov | ATH | Olympics | 2012 | 2–0–0 2013 Kazan ATH gold: 20 km walk and 20 km walk team | |
| Vladimir Krivtsov | SWM | Olympics | 1972 | 1–1–0 1973 Moskva SWI gold: 4×200 m freestyle relay, silver: 4×100 m freestyle relay | |
| DoDo Krnáč | JUD | Olympics | 2004 | 0–0–2 1999 Palma de Mallorca JUD bronze: half-lightweight -66 kg; 2003 Daegu JUD bronze: half-lightweight -66 kg | |
| Hans Kroes | SWM | Olympics | 1984—1988 | 0–3–1 1987 Zagreb SWI silver: 50 m freestyle, 4×100 m freestyle relay, and 4×200 m freestyle relay, bronze: 100 m freestyle | |
| Wiesław Król | ATH | Olympics | 1960 | 0–0–2 1959 Torino ATH bronze: 400 m hurdles; 1961 Sofia ATH bronze: 110 m hurdles | |
| Robert Kronberg | ATH | Olympics | 2000—2004 | 0–0–1 2001 Beijing ATH bronze: 110 m hurdles | |
| Ștefan Kroner | WPO | Olympics | 1960—1964 | 0–0–1 1965 Budapest WAP bronze | |
| Stano Kropilák | BKB | Olympics | 1976—1980 | 0–0–1 1977 Sofia BAS bronze | |
| Viktor Krovopuskov | FEN | Olympics | 1976—1980 | 2–0–0 1970 Torino FEN gold: sabre team; 1973 Moskva FEN gold: sabre team | |
| Lukáš Krpálek | JUD | Olympics / Opening Flagbearer | 2012—2024 | 2–0–0 2013 Kazan JUD gold: half-heavyweight -100 kg and open class | |
| Nataša Krsmanović | VVO | Olympics | 2008—2012 | 0–1–0 2009 Beograd VOL silver | |
| Frantz Kruger | ATH | Olympics | 2000—2008 | 1–0–0 1999 Palma de Mallorca ATH gold: discus throw (competed for South Africa) | |
| Sergey Kruglov | SHO | Olympics | 2008 | 1–3–2 2007 Bangkok SHO gold: 10 m air rifle team, silver: 10 m air rifle, bronze: 50 m rifle three positions team; 2013 Kazan silver: 10 m air rifle team and 50 m rifle three positions team, bronze: 10 m air rifle | |
| Oleksiy Kruhliak | FEN | Olympics | 2000 | 1–0–0 1997 Catania FEN gold: foil team | |
| Annerose Krumpholz | ATH | Olympics | 1972 | 0–1–1 1973 Moskva ATH silver: 100 m hurdles, bronze: 4×100 m relay | |
| Pavel Krupko | ROW | Olympics | 1988 | 0–1–0 1987 Zagreb ROW silver: quadruple sculls | |
| Oleksandr Krykun | ATH | Olympics | 1996—2004 | 0–1–0 1995 Fukuoka ATH silver: hammer throw | |
| Kamil Kryński | ATH | Olympics | 2012 | 0–1–1 2013 Kazan ATH bronze: 4×100 m relay; 2015 Gwangju ATH silver: 4×100 m relay | |
| Nikolay Kryukov | GAR | Olympics | 1996—2008 | 2–3–0 1999 Palma de Mallorca GYM gold: parallel bars and horizontal bar, silver: all-around, horse vault, and team | |
| Olena Kryvytska | FEN | Olympics | 2012—2024 | 2–1–1 2007 Bangkok FEN gold: épée team; 2009 Beograd FEN gold: épée team; 2011 Shenzhen FEN silver: épée; 2013 Kazan FEN bronze: épée team | |
| Andrzej Krzepiński | ROW | Olympics | 1988—1992 | 1–0–0 1987 Zagreb ROW gold: quadruple sculls | |
| Adam Krzesiński | FEN | Olympics | 1992—2000 | 0–0–1 1991 Sheffield FEN bronze: foil team | |
| Robert Kubaczyk | ATH | Olympics / Non-starter | 2008—2012 | 0–1–0 2009 Beograd ATH silver: 4×100 m relay | |
| Dariusz Kuć | ATH | Olympics | 2008—2012 | 0–1–1 2009 Beograd ATH silver: 4×100 m relay; 2013 Kazan ATH bronze: 4×100 m relay | |
| Martin Kučera | ATH | Olympics | 2016 | 1–0–0 2013 Kazan ATH gold: 400 m hurdles | |
| Beata Kucharzewska | JUD | Olympics | 1996 | 0–0–1 1995 Fukuoka JUD bronze: team | |
| Nina Kucheran | SWM | YOG | 2018 | 0–0–1 2019 Napoli SWI bronze: 4×100 m medley relay | |
| Mariya Kuchina-Lasitskene | ATH | Olympics / YOG | 2010—2020 | 0–1–0 2013 Kazan ATH silver: high jump | |
| Sławomir Kuczko | SWM | Olympics | 2012 | 1–0–0 2005 İzmir SWI gold: 200 m breaststroke | |
| Tatyana Kudashova-Minina | TKW | Olympics / YOG | 2014—2020 | 0–1–0 2015 Gwangju TKW silver: Kyorugi team | |
| Aigars Kudis | SWM | Olympics | 1976 | 0–0–1 1977 Sofia SWI bronze: 200 m breaststroke | |
| Michał Kudła | CSP | Olympics | 2016 | 0–0–1 2013 Kazan CAN bronze: C4 1000 m | |
| Nataliya Kudreva | VVO | Olympics | 1972 | 1–0–0 1970 Torino VOL gold | |
| Sergey Kudryayev | SWM | Olympics | 1988 | 1–0–0 1991 Sheffield SWI gold: 4×200 m freestyle relay | |
| Jouko Kuha | ATH | Non-starter | 1968 | 1–0–0 1967 Tokyo ATH gold: 3000 m steeplechase | |
| André Kuhn | FEN | Olympics | 1988—1992 | 0–1–0 1981 București FEN silver: épée team | |
| Kui Yuanyuan | GAR | Olympics | 1996—2000 | 0–0–1 1999 Palma de Mallorca GYM bronze: team | |
| Mariusz Kujawski | CSP | Olympics | 2008 | 1–1–1 2013 Kazan CAN gold: K2 1000 m, silver: K2 500 m, bronze: K4 500 m | |
| Petru Kuki | FEN | Olympics / Referee | 1976—1996 | 0–1–0 1981 București FEN silver: foil | |
| Nikolay Kuksenkov | GAR | Olympics | 2012—2016 | 4–1–0 2011 Shenzhen GYM gold: all-around, silver: horizontal bar (competed for Ukraine); 2013 Kazan GYM gold: all-around, pommelled horse, and team (competed for Russia) | |
| Dainis Kūla | ATH | Olympics | 1980 | 2–0–0 1981 București ATH gold: javelin throw; 1983 Edmonton ATH gold: javelin throw | |
| Gergely Kulcsár | ATH | Olympics / Opening Flagbearer / Closing Flagbearer | 1960—1972 | 1–1–1 1959 Torino ATH silver: javelin throw; 1961 Sofia ATH gold: javelin throw; 1963 Porto Alegre ATH bronze: javelin throw | |
| Győző Kulcsár | FEN | Olympics | 1964—1976 | 1–2–0 1963 Porto Alegre FEN silver: foil team and épée team; 1965 Budapest FEN gold: épée team | |
| Krisztián Kulcsár | FEN | Olympics / Administrator | 1992—2022 | 1–2–0 1993 Buffalo FEN silver: épée and épée team; 1995 Fukuoka FEN gold: épée team | |
| Tadeusz Kulczycki | ATH | Olympics | 1972 | 0–0–1 1973 Moskva ATH bronze: 400 m hurdles | |
| Vyacheslav Kulebyakin | ATH | Olympics | 1976 | 0–0–1 1977 Sofia ATH bronze: 110 m hurdles | |
| Piotr Kuleta | CSP | Olympics | 2012 | 0–0–1 2013 Kazan CAN bronze: C4 1000 m | |
| Nikola Kuljača | WPO | Olympics / Non-starter | 2000—2004 | 1–0–0 1995 Fukuoka WAP gold | |
| Valter Külvet | ATH | Olympics | 1988 | 0–1–0 1985 Kobe ATH silver: decathlon | |
| Yasunori Kumada | VVO | Olympics | 1988 | 1–0–1 1981 București VOL bronze; 1985 Kobe VOL gold | |
| Kagisho Kumbane | ATH | Olympics | 2008 | 0–0–1 2009 Beograd ATH bronze: 4×100 m relay | |
| Naoko Kume | SWM | Olympics | 1984 | 0–1–1 1983 Edmonton SWI silver: 200 m butterfly, bronze: 100 m butterfly | |
| Luksika Kumkhum | TEN | YOG | 2010 | 0–2–0 2015 Gwangju TEN silver: singles and team | |
| Yury Kunakov | DIV | Olympics | 2008 | 0–1–0 2013 Kazan DIV silver: team |