Host cities:
| Athlete | Nation(s) | Sport(s) | Role(s) | Era | Notes |
|---|---|---|---|---|---|
| Friedrich Janke | GDR GER |
ATH | Olympics | 1956—1960 | 0–1–0 1962 Beograd silver: 10000 m |
| Karin Janke | FRG |
ATH | Olympics | 1988 | 0–0–1 1994 Helsinki bronze: 4×400 m relay (competed for Germany) |
| Tomáš Janků | CZE |
ATH | Olympics | 1996—2008 | 0–1–0 2006 Göteborg silver: high jump |
| Wioletta Janowska-Frankiewicz | POL |
ATH | Olympics | 2004—2008 | 0–0–2 2006 Göteborg bronze: 3000 m steeplechase (competed as Wioletta Janowska); 2010 Barcelona bronze: 3000 m steeplechase (competed as Wioletta Frankiewicz) |
| Gunnar Jansson | SWE |
ATH | Olympics | 1932—1936 | 0–0–1 1934 Torino bronze: hammer throw |
| Paweł Januszewski | POL |
ATH | Olympics | 1996—2000 | 1–0–1 1998 Budapest gold: 400 m hurdles; 2002 München bronze: 400 m hurdles |
| Helmut Janz | GER FRG |
ATH | Olympics / Non-starter | 1956—1960 | 0–0–1 1962 Beograd bronze: 400 m hurdles |
| Zbigniew Jaremski | POL |
ATH | Olympics / Non-starter | 1972—1980 | 0–1–0 1978 Praha silver: 4×400 m relay |
| Tony Jarrett | GBR |
ATH | Olympics | 1988—2000 | 0–1–1 1990 Split silver: 110 m hurdles; 1994 Helsinki bronze: 110 m hurdles |
| Akilles Järvinen | FIN |
ATH | Olympics / Other | 1928—1936 | 0–1–0 1934 Torino silver: 400 m hurdles |
| Matti Järvinen | FIN |
ATH | Olympics | 1932—1936 | 2–0–0 1934 Torino gold: javelin throw; 1938 Paris gold: javelin throw |
| Daniela Jaworska | POL |
ATH | Olympics | 1968—1972 | 1–0–0 1971 Helsinki gold: javelin throw |
| Michel Jazy | FRA |
ATH | Olympics | 1956—1964 | 2–1–0 1962 Beograd gold: 1500 m; 1966 Budapest gold: 5000 m, silver: 1500 m |
| Danuta Jędrejek | POL |
ATH | Olympics / Non-starter | 1972—1976 | 0–0–1 1974 Roma bronze: 4×100 m relay |
| Marcin Jędrusiński | POL |
ATH | Olympics | 2004—2008 | 0–1–0 2006 Göteborg silver: 4×100 m relay |
| Jaroslava Jehličková | CZE TCH |
ATH | Olympics | 1968—1972 | 1–0–0 1969 Athina gold: 1500 m |
| Tatjana Jelača | SRB |
ATH | Olympics | 2008—2012 | 0–1–0 2014 Zürich silver: javelin throw |
| Martin Jellinghaus | FRG |
ATH | Olympics | 1968—1972 | 1–0–1 1969 Athina bronze: 4×400 m relay; 1971 Helsinki gold: 4×400 m relay |
| David Jenkins | GBR |
ATH | Olympics | 1972—1980 | 2–2–0 1971 Helsinki gold: 400 m; 1974 Roma gold: 4×400 m relay, silver: 400 m; 1982 Athina silver: 4×400 m relay |
| Marta Jeschke | POL |
ATH | Olympics | 2008—2012 | 0–0–2 2010 Barcelona bronze: 4×100 m relay; 2012 Helsinki bronze: 4×100 m relay |
| Celina Jesionowska | POL |
ATH | Olympics | 1960 | 0–0–1 1958 Stockholm bronze: 4×100 m relay |
| Olivera Jevtić | SRB SCG |
ATH | Olympics | 2000—2016 | 0–1–0 2006 Göteborg silver: marathon (competed for Serbia) |
| Antonio Jiménez | ESP |
ATH | Olympics | 2004 | 1–0–0 2002 München gold: 3000 m steeplechase |
| Hinrich John | GER FRG |
ATH | Olympics | 1964—1968 | 0–1–0 1966 Budapest silver: 110 m hurdles (competed for West Germany) |
| Sabine John | GDR |
ATH | Olympics | 1988 | 0–1–0 1982 Athina silver: heptathlon (competed as Sabine Möbius) |
| Katarina Johnson-Thompson | GBR |
ATH | Olympics | 2012—2020 | 0–1–0 2018 Berlin silver: heptathlon |
| Jade Johnson | GBR |
ATH | Olympics | 2004—2008 | 0–1–0 2002 München silver: long jump |
| David Jones | GBR |
ATH | Olympics | 1960 | 0–0–1 1962 Beograd bronze: 4×100 m relay |
| Ken Jones | GBR |
ATH | Olympics | 1948 | 0–1–0 1954 Bern silver: 4×100 m relay |
| Ron Jones | GBR |
ATH | Olympics | 1964—1968 | 0–0–1 1962 Beograd bronze: 4×100 m relay |
| Gré de Jongh | NED |
ATH | Olympics | 1948—1952 | 0–1–0 1950 Bruxelles silver: 4×100 m relay |
| Henry Jonsson | SWE |
ATH | Olympics | 1936 | 0–1–0 1938 Paris silver: 5000 m |
| Lennart Jonsson | SWE |
ATH | Olympics | 1960 | 0–0–1 1958 Stockholm bronze: 4×400 m relay |
| Winnie Jordan | GBR |
ATH | Olympics | 1948 | 0–2–0 1946 Oslo silver: 100 m and 200 m |
| Erik Jørgensen | DEN |
ATH | Olympics | 1948 | 0–0–1 1946 Oslo bronze: 1500 m |
| Prudent Joye | FRA |
ATH | Olympics | 1936 | 1–0–0 1938 Paris gold: 400 m hurdles |
| Jarosława Jóźwiakowska-Bieda | POL |
ATH | Olympics | 1960—1964 | 0–0–1 1966 Budapest bronze: high jump (competed as Jarosława Bieda) |
| Joanna Jóźwik | POL |
ATH | Olympics | 2016—2020 | 0–0–1 2014 Zürich bronze: 800 m |
| Marie-Laurence Jungfleisch | GER |
ATH | Olympics | 2016—2020 | 0–0–1 2018 Berlin bronze: high jump |
| Stanislav Jungwirth | CZE TCH |
ATH | Olympics | 1952—1956 | 0–0–1 1954 Bern bronze: 1500 m |
| Jerzy Juskowiak | POL |
ATH | Olympics | 1960 | 0–1–0 1962 Beograd silver: 4×100 m relay |
| Klaus-Peter Justus | GDR |
ATH | Olympics | 1972 | 1–0–0 1974 Roma gold: 1500 m |
| Alberto Juzdado | ESP |
ATH | Olympics | 1996—2000 | 0–0–1 1994 Helsinki bronze: marathon |
| Krystyna Kacperczyk | POL |
ATH | Olympics | 1972 | 0–0–1 1978 Praha bronze: 4×400 m relay |
| Gerda van der Kade-Koudijs | NED |
ATH | Olympics | 1948 | 2–0–0 1946 Oslo gold: 4×100 m relay and long jump |
| Pentti Kahma | FIN |
ATH | Olympics | 1972—1976 | 1–0–0 1974 Roma gold: discus throw |
| Oleksandr Kaidash | UKR |
ATH | Olympics | 2000 | 1–0–0 2002 München gold: 4×100 m relay |
| Jo Kaiser | GER FRG |
ATH | Olympics | 1960 | 0–1–0 1958 Stockholm silver: 4×400 m relay |
| Vera Kalashnikova-Krepkina | URS UKR |
ATH | Olympics | 1952—1960 | 2–1–0 1954 Bern gold: 4×100 m relay (competed as Vera Krepkina); 1958 Stockholm gold: 4×100 m relay, silver: 100 m (competed as Vera Krepkina) |
| Birutė Kalėdienė | LTU URS |
ATH | Olympics | 1960—1964 | 0–1–0 1958 Stockholm silver: javelin throw (competed as Birutė Zalogaitytė) |
| Lauri Kalima | FIN |
ATH | Olympics | 1936 | 0–0–1 1938 Paris bronze: high jump |
| Damian Kallabis | GER |
ATH | Olympics | 2000 | 1–0–0 1998 Budapest gold: 3000 m steeplechase |
| Antti Kalliomäki | FIN |
ATH | Olympics | 1972—1980 | 0–1–0 1978 Praha silver: pole vault |
| Susanna Kallur | SWE |
ATH | Olympics | 2004—2016 | 1–0–0 2006 Göteborg gold: 100 m hurdles |
| Henrik Kalocsai | HUN |
ATH | Olympics | 1964—1968 | 0–0–1 1966 Budapest bronze: triple jump |
| Lev Kalyayev | RUS URS |
ATH | Olympics | 1952 | 1–0–0 1950 Bruxelles gold: 4×100 m relay |
| Mujinga Kambundji | SUI |
ATH | Olympics / Other | 2012—2020 | 0–0–1 2016 Amsterdam bronze: 100 m |
| Olga Kaniskina | RUS |
ATH | Olympics | 2008—2012 | 0–1–0 2006 Göteborg silver: 20 km walk |
| Bernd Kannenberg | FRG |
ATH | Olympics | 1972—1976 | 0–1–0 1974 Roma silver: 20 km walk |
| Gerd Kanter | EST |
ATH | Olympics / Other | 2004—2016 | 0–3–1 2006 Göteborg silver: discus throw; 2012 Helsinki silver: discus throw; 2014 Zürich silver: discus throw; 2016 Amsterdam bronze: discus throw |
| Anastasiya Kapachinskaya | RUS |
ATH | Olympics | 2008—2012 | 0–1–0 2002 München silver: 4×400 m relay |
| Denis Kapustin | RUS |
ATH | Olympics | 2000 | 1–1–0 1994 Helsinki gold: triple jump; 1998 Budapest silver: triple jump |
| Nikolay Karasyov | RUS URS |
ATH | Olympics | 1964 | 0–1–0 1966 Budapest silver: shot put |
| Milada Karbanová | CZE TCH |
ATH | Olympics | 1972—1976 | 0–1–0 1974 Roma silver: high jump |
| Volha Kardapoltsava | BLR |
ATH | Olympics | 1996 | 0–1–0 1990 Split silver: 10 km walk (competed for the Soviet Union) |
| Olli-Pekka Karjalainen | FIN |
ATH | Olympics | 2000—2008 | 1–0–0 2006 Göteborg gold: hammer throw |
| Michael Karst | FRG |
ATH | Olympics | 1976 | 0–0–1 1974 Roma bronze: 3000 m steeplechase |
| Ossi Karttunen | FIN |
ATH | Olympics | 1972—1976 | 0–0–1 1974 Roma bronze: 4×400 m relay |
| Veikko Karvonen | FIN |
ATH | Olympics | 1952—1956 | 1–1–0 1950 Bruxelles silver: marathon; 1954 Bern gold: marathon |
| Oleksiy Kasianov | UKR |
ATH | Olympics | 2008—2016 | 0–1–0 2012 Helsinki silver: decathlon |
| Šárka Kašpárková | CZE TCH |
ATH | Olympics | 1992—2004 | 0–1–0 1998 Budapest silver: triple jump (competed for Czech Republic) |
| Carl Kaufmann | GER FRG |
ATH | Olympics | 1960 | 0–1–0 1958 Stockholm silver: 4×400 m relay |
| Waltraud Kaufmann | GDR GER |
ATH | Olympics | 1964 | 0–1–0 1962 Beograd silver: 800 m |
| Ali Kaya | TUR |
ATH | Olympics | 2016 | 0–1–1 2014 Zürich bronze: 10000 m; 2016 Amsterdam silver: 10000 m |
| Aras Kaya | TUR |
ATH | Olympics | 2016 | 0–1–0 2016 Amsterdam silver: 3000 m steeplechase |
| Özlem Kaya | TUR |
ATH | Olympics | 2012—2016 | 0–0–1 2016 Amsterdam bronze: 3000 m steeplechase |
| Hanna Kazak | BLR |
ATH | Olympics / Non-starter | 1996—2008 | 0–1–0 2006 Göteborg silver: 4×400 m relay |
| Olga Kazi | HUN |
ATH | Olympics | 1960—1964 | 0–0–1 1962 Beograd bronze: 800 m |
| Piotr Kędzia | POL |
ATH | Olympics / Non-starter | 2004—2008 | 0–0–1 2006 Göteborg bronze: 4×400 m relay |
| Naman Keïta | FRA |
ATH | Olympics | 2004 | 1–0–1 2002 München bronze: 4×400 m relay; 2006 Göteborg gold: 4×400 m relay |
| Anastasia Kelesidou | GRE |
ATH | Olympics | 1996—2004 | 0–0–1 2002 München bronze: discus throw |
| Martin Keller | GER |
ATH | Olympics | 2008 | 0–1–1 2010 Barcelona bronze: 4×100 m relay; 2012 Helsinki silver: 4×100 m relay (ran in heats only) |
| Franz-Josef Kemper | FRG |
ATH | Olympics | 1968—1972 | 0–1–0 1966 Budapest silver: 800 m |
| Kostas Kenteris | GRE |
ATH | Olympics | 2000 | 1–0–0 2002 München gold: 200 m |
| Linda Keough | GBR |
ATH | Olympics | 1988 | 0–0–1 1990 Split bronze: 4×400 m relay |
| Manfred Kersch | GER |
ATH | Olympics | 1936 | 1–0–0 1938 Paris gold: 4×100 m relay |
| Jukka Keskisalo | FIN |
ATH | Olympics / Non-starter | 2008—2012 | 1–0–0 2006 Göteborg gold: 3000 m steeplechase |
| Irina Khabarova | RUS |
ATH | Olympics | 2000—2004 | 1–0–2 2002 München bronze: 4×100 m relay; 2006 Göteborg gold: 4×100 m relay, bronze: 100 m |
| Tatsiana Khaladovich | BLR |
ATH | Olympics | 2016—2020 | 1–0–0 2016 Amsterdam gold: javelin throw |
| Gulfiya Khanafeyeva | RUS |
ATH | Olympics | 2012 | 0–1–0 2006 Göteborg silver: hammer throw |
| Natallia Kharaneka-Mikhnevich | BLR |
ATH | Olympics | 2004—2012 | 1–0–0 2006 Göteborg gold: shot put (competed as Natallia Kharaneka) |
| Iryna Khliustava | BLR |
ATH | Olympics | 2000—2012 | 0–1–0 2006 Göteborg silver: 4×400 m relay (ran in heats only) |
| Olena Kholosha | UKR |
ATH | Olympics | 2012 | 0–0–1 2012 Helsinki bronze: high jump |
| Nataliya Khrushchelyeva | RUS |
ATH | Olympics | 2004 | 0–2–0 1994 Helsinki silver: 4×400 m relay; 1998 Budapest silver: 4×400 m relay |
| Hilda Kibet | NED |
ATH | Olympics | 2008—2012 | 0–0–1 2010 Barcelona bronze: 10000 m |
| Vaclavas Kidykas | LTU URS |
ATH | Olympics | 1988—2000 | 0–0–1 1986 Stuttgart bronze: discus throw (competed for the Soviet Union) |
| Ellen Kießling | GER |
ATH | Olympics | 1992 | 0–1–0 1990 Split silver: 1500 m (competed for East Germany) |
| Brian Kilby | GBR |
ATH | Olympics | 1960—1964 | 1–0–0 1962 Beograd gold: marathon |
| Richard Kilty | GBR |
ATH | Olympics | 2016—2020 | 1–0–0 2014 Zürich gold: 4×100 m relay |
| Bev Kinch | GBR |
ATH | Olympics | 1988 | 0–0–1 1990 Split bronze: 4×100 m relay |
| Manfred Kinder | GER FRG |
ATH | Olympics | 1960—1968 | 1–2–1 1962 Beograd gold: 4×400 m relay, silver: 400 m (competed for Germany); 1966 Budapest silver: 4×400 m relay, bronze: 400 m (competed for West Germany) |
| Gisela Kinzel | FRG |
ATH | Olympics | 1988 | 0–1–0 1986 Stuttgart silver: 4×400 m relay |
| Wilson Kipketer | DEN |
ATH | Olympics | 2000—2004 | 1–0–0 2002 München gold: 800 m |
| Anisya Kirdyapkina | RUS |
ATH | Olympics | 2012 | 1–0–0 2010 Barcelona gold: 20 km walk |
| Nikolay Kirov | BLR URS |
ATH | Olympics | 1980 | 0–1–0 1982 Athina silver: 1500 m |
| Joachim Kirst | GDR |
ATH | Olympics | 1968—1972 | 2–0–0 1969 Athina gold: decathlon; 1971 Helsinki gold: decathlon |
| Irena Kirszenstein-Szewińska | POL |
ATH | Olympics / Administrator | 1964—2018 | 5–1–4 1966 Budapest gold: 200 m, 4×100 m relay, and long jump, silver: 100 m (competed as Irena Kirszenstein); 1971 Helsinki bronze: 200 m (competed as Irena Szewińska); 1974 Roma gold: 100 m and 200 m, bronze: 4×100 m relay (competed as Irena Szewińska); 1978 Praha bronze: 400 m and 4×400 m relay (competed as Irena Szewińska) |
| Magnus Kirt | EST |
ATH | Olympics | 2016 | 0–0–1 2018 Berlin bronze: javelin throw |
| Linda Kisabaka | GER |
ATH | Olympics | 1992—1996 | 0–0–1 1994 Helsinki bronze: 4×400 m relay (ran in heats only) |
| Vladimir Kishkun | RUS URS |
ATH | Olympics | 1976 | 1–0–0 1974 Roma gold: pole vault |
| Balázs Kiss | HUN |
ATH | Olympics | 1996 | 0–1–0 1998 Budapest silver: hammer throw |
| Dániel Kiss | HUN |
ATH | Olympics | 2008—2012 | 0–0–1 2010 Barcelona bronze: 110 m hurdles |
| Ulrike Klapezynski-Bruns | GDR |
ATH | Olympics | 1976—1980 | 0–0–1 1986 Stuttgart bronze: 10000 m (competed as Ulrike Bruns) |
| Max Klauß | GDR |
ATH | Olympics | 1972 | 1–0–0 1971 Helsinki gold: long jump |
| Jolán Kleiber-Kontsek | HUN |
ATH | Olympics / Non-starter | 1964—1972 | 0–0–1 1962 Beograd bronze: discus throw (competed as Jolán Kontsek) |
| Peter Klein | FRG |
ATH | Olympics | 1984—1988 | 0–0–1 1982 Athina bronze: 4×100 m relay |
| Nadine Kleinert-Schmitt | GER |
ATH | Olympics | 2000—2012 | 1–0–0 2012 Helsinki gold: shot put (competed as Nadine Kleinert) |
| Romuald Klim | BLR URS |
ATH | Olympics | 1964—1968 | 1–1–0 1966 Budapest gold: hammer throw; 1969 Athina silver: hammer throw |
| Inta Kļimoviča | LAT URS |
ATH | Olympics | 1976 | 0–0–1 1974 Roma bronze: 4×400 m relay |
| Margrit Klinger | FRG |
ATH | Olympics | 1984 | 0–0–1 1982 Athina bronze: 800 m |
| Darya Klishina | ROC RUS |
ATH | Olympics | 2016—2020 | 0–0–1 2014 Zürich bronze: long jump |
| Ewa Kłobukowska | POL |
ATH | Olympics | 1964 | 2–1–0 1966 Budapest gold: 100 m and 4×100 m relay, silver: 200 m |
| Ewelina Klocek-Ptak | POL |
ATH | Olympics | 2008—2012 | 0–0–1 2012 Helsinki bronze: 4×100 m relay (competed as Ewelina Ptak) |
| Carolina Klüft | SWE |
ATH | Olympics | 2004—2008 | 2–0–0 2002 München gold: heptathlon; 2006 Göteborg gold: heptathlon |
| Oleksandr Klymenko | UKR EUN |
ATH | Olympics | 1992—1996 | 1–0–0 1994 Helsinki gold: shot put (competed for Ukraine) |
| Sergey Klyugin | RUS |
ATH | Olympics | 2000 | 0–0–1 1998 Budapest bronze: high jump |
| Svetlana Klyuka | RUS |
ATH | Olympics | 2008 | 0–1–0 2006 Göteborg silver: 800 m |
| Andreas Knebel | GDR |
ATH | Olympics | 1980 | 0–1–0 1982 Athina silver: 400 m |
| Manfred Knickenberg | GER FRG |
ATH | Olympics / Non-starter | 1964—1968 | 0–0–1 1966 Budapest bronze: 4×100 m relay (competed for West Germany) |
| Sven Knipphals | GER |
ATH | Olympics | 2016 | 0–1–1 2014 Zürich silver: 4×100 m relay; 2016 Amsterdam bronze: 4×100 m relay |
| Silke Knoll | GER FRG |
ATH | Olympics | 1988—1996 | 1–1–0 1990 Split silver: 4×100 m relay (competed for West Germany); 1994 Helsinki gold: 4×100 m relay (competed for Germany) |
| Anna Knoroz | RUS |
ATH | Olympics | 1996 | 0–0–1 1994 Helsinki bronze: 400 m hurdles |
| Linda Knowles | GBR |
ATH | Olympics | 1964 | 0–0–1 1962 Beograd bronze: high jump |
| Hanna Knyazyeva-Minenko | ISR UKR |
ATH | Olympics / Other | 2012—2020 | 0–1–0 2016 Amsterdam silver: triple jump (competed for Israel) |
| Karsten Kobs | GER |
ATH | Olympics | 1996—2004 | 0–0–1 1998 Budapest bronze: hammer throw |
| Cees Koch | NED |
ATH | Olympics | 1960—1964 | 0–1–0 1962 Belgrade silver: discus throw |
| Marita Koch | GDR |
ATH | Olympics | 1976—1980 | 6–0–0 1978 Praha gold: 400 m and 4×400 m relay; 1982 Athina gold: 400 m and 4×400 m relay; 1986 Stuttgart gold: 400 m and 4×400 m relay |
| Gisela Köhler-Birkemeyer | GDR GER |
ATH | Olympics | 1956—1960 | 0–0–1 1958 Stockholm bronze: 80 m hurdles (competed as Gisela Birkemeyer) |
| Hermann Köhler | FRG |
ATH | Olympics | 1972 | 1–1–0 1971 Helsinki gold: 4×400 m relay; 1974 Roma silver: 4×400 m relay |
| Fabienne Kohlmann | GER |
ATH | Olympics | 2012—2016 | 1–0–0 2010 Barcelona gold: 4×400 m relay |
| Carsten Köhrbrück | GER |
ATH | Olympics | 1992 | 0–1–0 1990 Split silver: 4×400 m relay (competed for West Germany) |
| Heli Koivula-Kruger | FIN |
ATH | Olympics | 1996—2004 | 0–1–0 2002 München silver: triple jump |
| Manfred Kokot | GDR |
ATH | Olympics | 1972—1976 | 0–1–1 1974 Roma bronze: 4×100 m relay; 1978 Praha silver: 4×100 m relay |
| Sara Kolak | CRO |
ATH | Olympics | 2016—2020 | 0–0–1 2016 Amsterdam bronze: javelin throw |
| Karel Kolář | CZE TCH |
ATH | Olympics | 1980 | 0–1–1 1978 Praha silver: 400 m, bronze: 4×400 m relay |
| Asmir Kolašinac | SRB |
ATH | Olympics | 2008—2020 | 0–0–1 2012 Helsinki bronze: shot put |
| Lyudmila Kolchanova | RUS |
ATH | Olympics | 2012 | 1–0–0 2006 Göteborg gold: long jump |
| Nikolay Kolesnikov | RUS URS |
ATH | Olympics | 1976 | 0–0–1 1978 Praha bronze: 4×100 m relay |
| Nadezhda Kolesnikova-Ilyina | RUS URS |
ATH | Olympics | 1972—1976 | 0–0–2 1971 Helsinki bronze: 4×400 m relay (competed as Nadezhda Kolesnikova); 1974 Roma bronze: 4×400 m relay (competed as Nadezhda Kolesnikova) |
| Yevgeniya Kolodko | RUS |
ATH | Olympics | 2012 | 0–1–0 2014 Zürich silver: shot put |
| Amelie Koloska | FRG |
ATH | Olympics | 1968—1972 | 0–1–0 1971 Helsinki silver: javelin throw |
| Władysław Komar | POL |
ATH | Olympics | 1964—1972 | 0–0–2 1966 Budapest bronze: shot put; 1971 Helsinki bronze: shot put |
| Lyudmila Kondratyeva | RUS URS |
ATH | Olympics | 1980—1988 | 2–0–0 1978 Praha gold: 200 m and 4×100 m relay |
| Yekaterina Kondratyeva | RUS |
ATH | Olympics | 2004 | 1–0–0 2006 Göteborg gold: 4×100 m relay (ran in heats only) |
| Ans Koning | NED |
ATH | Olympics | 1948 | 0–0–1 1946 Oslo bronze: javelin throw |
| Valentin Kononen | FIN |
ATH | Olympics | 1992—2000 | 0–1–0 1998 Budapest silver: 50 km walk |
| Yury Konovalov | AZE URS |
ATH | Olympics | 1956—1960 | 0–0–1 1958 Stockholm bronze: 4×100 m relay |
| Nadezhda Konyayeva | RUS URS |
ATH | Olympics | 1956 | 0–0–1 1954 Bern bronze: javelin throw |
| Daria Korczyńska | POL |
ATH | Olympics | 2008—2012 | 0–0–2 2010 Barcelona bronze: 4×100 m relay; 2012 Helsinki bronze: 4×100 m relay |
| Waldemar Korycki | POL |
ATH | Non-starter | 1972 | 0–1–0 1971 Helsinki silver: 4×400 m relay |
| Robert Korzeniowski | POL |
ATH | Olympics / Other | 1992—2004 | 2–0–0 1998 Budapest gold: 50 km walk; 2002 München gold: 50 km walk |
| Irina Korzhanenko | RUS |
ATH | Olympics | 1996—2004 | 1–1–0 1998 Budapest silver: shot put; 2002 München gold: shot put |
| Alexander Kosenkow | GER KGZ |
ATH | Olympics | 2004—2012 | 0–2–2 2002 München bronze: 4×100 m relay; 2010 Barcelona bronze: 4×100 m relay; 2012 Helsinki silver: 4×100 m relay; 2014 Zürich silver: 4×100 m relay |
| Väinö Koskela | FIN |
ATH | Olympics | 1948—1952 | 0–0–1 1950 Bruxelles bronze: 10000 m |
| Dmitry Kosov | RUS EUN |
ATH | Olympics | 1992—1996 | 0–0–1 1994 Helsinki bronze: 4×400 m relay (competed for Russia) |
| Stefka Kostadinova | BUL |
ATH | Olympics / Administrator | 1988—2005 | 1–0–0 1986 Stuttgart gold: high jump |
| Dietmar Koszewski | GER |
ATH | Olympics | 1992 | 0–0–1 1990 Split bronze: 110 m hurdles (competed for West Germany) |
| Kalevi Kotkas | FIN |
ATH | Olympics | 1932—1936 | 1–1–0 1934 Torino gold: high jump; 1938 Paris silver: high jump |
| Olga Kotlyarova | RUS |
ATH | Olympics / Non-starter | 1996—2004 | 1–1–1 1998 Budapest silver: 4×400 m relay, bronze: 400 m; 2006 Göteborg gold: 800 m |
| Tatyana Kotova | RUS |
ATH | Olympics | 2000—2008 | 1–0–0 2002 München gold: long jump |
| Karl Kotratschek | AUT |
ATH | Olympics | 1936 | 0–0–1 1938 Paris bronze: triple jump (competed for Germany) |
| Kostas Koukodimos | GRE |
ATH | Olympics | 1992—2000 | 0–0–1 1994 Helsinki bronze: long jump |
| József Kovács | HUN |
ATH | Olympics | 1936 | 1–2–0 1934 Torino gold: 110 m hurdles, silver: 4×100 m relay; 1938 Paris silver: 400 m hurdles |
| József Kovács | HUN |
ATH | Olympics | 1952—1960 | 0–1–0 1954 Bern silver: 10000 m |
| Liudmyla Kovalenko | UKR |
ATH | Olympics | 2012 | 0–1–0 2012 Helsinki silver: 5000 m |
| Yoann Kowal | FRA |
ATH | Olympics | 2012—2016 | 1–0–1 2014 Zürich gold: 3000 m steeplechase; 2016 Amsterdam bronze: 3000 m steeplechase |
| Władysław Kozakiewicz | POL |
ATH | Olympics | 1976—1980 | 0–1–0 1974 Roma silver: pole vault |
| Gerda Kraan | NED |
ATH | Olympics | 1960—1964 | 1–0–0 1962 Beograd gold: 800 m |
| Katrin Krabbe | GDR |
ATH | Olympics | 1988 | 3–0–0 1990 Split gold: 100 m, 200 m, and 4×100 m relay |
| Oleh Kramarenko | UKR |
ATH | Olympics | 1996 | 0–1–0 1994 Helsinki silver: 4×100 m relay |
| Frédéric Krantz | FRA |
ATH | Olympics | 2000—2004 | 0–1–0 1998 Budapest silver: 4×100 m relay |
| Vladimir Krasnov | RUS |
ATH | Olympics | 2012 | 1–1–0 2010 Barcelona gold: 4×400 m relay; 2014 Zürich silver: 4×400 m relay |
| Jarmila Kratochvílová | CZE TCH |
ATH | Olympics | 1980 | 0–2–0 1982 Athina silver: 400 m and 4×400 m relay |
| Guido Kratschmer | FRG |
ATH | Olympics | 1976—1984 | 0–0–1 1974 Roma bronze: decathlon |
| Andrei Krauchanka | BLR |
ATH | Olympics | 2008 | 1–0–1 2010 Barcelona bronze: decathlon; 2014 Zürich gold: decathlon |
| Gesa Felicitas Krause | GER |
ATH | Olympics | 2012—2020 | 2–0–1 2012 Helsinki bronze: 3000 m steeplechase; 2016 Amsterdam gold: 3000 m steeplechase; 2018 Berlin gold: 3000 m steeplechase |
| Käthe Krauß | GER |
ATH | Olympics | 1936 | 1–2–0 1938 Wien gold: 4×100 m relay, silver: 100 m and 200 m |
| Inesa Kravets | URS UKR EUN |
ATH | Olympics | 1988—1996 | 0–1–1 1994 Helsinki silver: long jump, bronze: triple jump (competed for Ukraine) |
| Łukasz Krawczuk | POL |
ATH | Olympics | 2016 | 0–1–1 2014 Zürich bronze: 4×400 m relay; 2016 Amsterdam silver: 4×400 m relay |
| Nataliya Kresova-Rusakova | RUS |
ATH | Olympics | 2004—2012 | 1–0–2 2006 Göteborg gold: 4×100 m relay, bronze: 200 m (competed as Nataliya Rusakova); 2014 Zürich bronze: 4×100 m relay (competed as Nataliya Rusakova) |
| Ingrid Kristiansen | NOR |
ATH | Olympics | 1984—1988 | 1–0–1 1982 Athina bronze: marathon; 1986 Stuttgart gold: 10000 m |
| Svetlana Krivelyova | RUS EUN |
ATH | Olympics | 1992—2004 | 0–0–1 2002 München bronze: shot put (competed for Russia) |
| Mikhail Krivonosov | BLR URS |
ATH | Olympics | 1952—1956 | 1–1–0 1954 Bern gold: hammer throw; 1958 Stockholm silver: hammer throw |
| Antonina Krivoshapka | RUS |
ATH | Olympics | 2012 | 0–0–1 2010 Barcelona bronze: 400 m |
| Ladislav Kříž | CZE TCH |
ATH | Olympics | 1972 | 1–0–1 1969 Athina bronze: 4×100 m relay; 1971 Helsinki gold: 4×100 m relay |
| Sonja Krolik-Oberem | GER |
ATH | Olympics | 1996—2000 | 0–0–1 2002 München bronze: marathon (competed as Sonja Oberem) |
| Anne Kroniger | FRG |
ATH | Olympics | 1972—1976 | 0–1–0 1974 Roma silver: 4×100 m relay |
| Kazimierz Kropidłowski | POL |
ATH | Olympics | 1956—1960 | 0–1–0 1958 Stockholm silver: long jump |
| Barbara Krug | GDR |
ATH | Olympics | 1980 | 1–0–0 1978 Praha gold: 4×400 m relay |
| Eric Krüger | GER |
ATH | Olympics | 2012 | 0–0–1 2012 Helsinki bronze: 4×400 m relay |