Host cities:
| Athlete | Nation(s) | Sport(s) | Role(s) | Era | Notes |
|---|---|---|---|---|---|
| Lies Krüger | ATH | Olympics | 1936 | 0–0–1 1938 Wien bronze: javelin throw | |
| Larisa Kruglova | ATH | Olympics | 2004 | 1–0–1 2002 München bronze: 4×100 m relay; 2006 Göteborg gold: 4×100 m relay (ran in heats only) | |
| Annerose Krumpholz | ATH | Olympics | 1972 | 0–1–0 1974 Roma silver: 100 m hurdles (competed as Annerose Fiedler) | |
| Vladimir Krylov | ATH | Olympics | 1988 | 1–0–1 1986 Stuttgart gold: 200 m, bronze: 4×400 m relay | |
| Jakub Krzewina | ATH | Olympics | 2016—2020 | 0–1–1 2014 Zürich bronze: 4×400 m relay; 2016 Amsterdam silver: 4×400 m relay | |
| Zdzisław Krzyszkowiak | ATH | Olympics | 1956—1960 | 2–0–0 1958 Stockholm gold: 5000 m and 10000 m | |
| Adam Kszczot | ATH | Olympics | 2012—2016 | 3–0–1 2010 Barcelona bronze: 800 m; 2014 Zürich gold: 800 m; 2016 Amsterdam gold: 800 m; 2018 Berlin gold: 800 m | |
| Dariusz Kuć | ATH | Olympics | 2008—2012 | 0–1–0 2006 Göteborg silver: 4×100 m relay | |
| Viktor Kudinsky | ATH | Olympics | 1968 | 1–0–0 1966 Budapest gold: 3000 m steeplechase | |
| Jan Kudlička | ATH | Olympics | 2008—2016 | 0–1–1 2014 Zürich bronze: pole vault; 2016 Amsterdam silver: pole vault | |
| Rita Kühne | ATH | Olympics | 1972 | 1–0–0 1971 Helsinki gold: 4×400 m relay | |
| Susan Kuijken | ATH | Olympics | 2016—2020 | 0–1–1 2014 Zürich bronze: 5000 m; 2018 Berlin silver: 10000 m (competed as Susan Krumins) | |
| Markku Kukkoaho | ATH | Olympics | 1972—1976 | 0–0–1 1974 Roma bronze: 4×400 m relay | |
| Gergely Kulcsár | ATH | Olympics / Opening Flagbearer / Closing Flagbearer | 1960—1972 | 0–0–2 1958 Stockholm bronze: javelin throw; 1966 Budapest bronze: javelin throw | |
| Yekaterina Kulikova | ATH | Olympics | 1996 | 0–1–0 1998 Budapest silver: 4×400 m relay (ran in heats only) | |
| Han Kulker | ATH | Olympics | 1988 | 0–0–1 1986 Stuttgart bronze: 1500 m | |
| Astrid Kumbernuss | ATH | Olympics | 1996—2004 | 1–1–0 1990 Split gold: shot put (competed for East Germany); 1994 Helsinki silver: shot put | |
| Risto Kuntsi | ATH | Olympics | 1936 | 0–1–0 1934 Torino silver: shot put | |
| Marina Kuptsova | ATH | Olympics | 2000 | 0–1–0 2002 München silver: high jump | |
| Maria Kusion-Bibro | ATH | Olympics | 1956—1960 | 0–0–1 1958 Stockholm bronze: 4×100 m relay (competed as Maria Bibro) | |
| Janusz Kusociński | ATH | Olympics | 1932 | 0–1–0 1934 Torino silver: 5000 m | |
| Vladimir Kuts | ATH | Olympics | 1956 | 1–0–0 1954 Bern gold: 5000 m | |
| Olga Kuzenkova | ATH | Olympics | 2000—2004 | 1–1–0 1998 Budapest silver: hammer throw; 2002 München gold: hammer throw | |
| Sergey Kuznetsov | ATH | Olympics | 1952 | 0–1–0 1946 Oslo silver: decathlon | |
| Vasily Kuznetsov | ATH | Olympics | 1956—1964 | 3–0–0 1954 Bern gold: decathlon; 1958 Stockholm gold: decathlon; 1962 Beograd gold: decathlon | |
| Vladimir Kuznetsov | ATH | Olympics | 1952—1964 | 0–1–0 1954 Bern silver: javelin throw | |
| Jiří Kynos | ATH | Olympics | 1972 | 1–0–1 1969 Athina bronze: 4×100 m relay; 1971 Helsinki gold: 4×100 m relay | |
| Nikol Kyriakopoulou | ATH | Olympics / Non-starter | 2008—2020 | 0–1–1 2012 Helsinki bronze: pole vault; 2018 Berlin silver: pole vault | |
| Simona La Mantia | ATH | Olympics | 2004—2012 | 0–1–0 2010 Barcelona silver: triple jump | |
| Stefano La Rosa | ATH | Olympics | 2016 | 1–0–1 2016 Amsterdam bronze: half-marathon team; 2018 Berlin gold: marathon team | |
| Denise Laborie-Guénard | ATH | Olympics | 1952—1964 | 0–1–0 1962 Beograd silver: pentathlon (competed as Denise Guénard) | |
| Renāte Lāce | ATH | Olympics | 1964 | 0–0–1 1966 Budapest bronze: 4×100 m relay | |
| Du'aine Ladejo | ATH | Olympics | 1992—1996 | 2–0–0 1994 Helsinki gold: 400 m and 4×400 m relay | |
| Ivet Lalova-Collio | ATH | Olympics / Opening Flagbearer | 2004—2020 | 1–2–0 2012 Helsinki gold: 100 m (competed as Ivet Lalova); 2016 Amsterdam silver: 100 m and 200 m | |
| Alessandro Lambruschini | ATH | Olympics | 1988—1996 | 1–1–1 1990 Split bronze: 3000 m steeplechase; 1994 Helsinki gold: 3000 m steeplechase; 1998 Budapest silver: 3000 m steeplechase | |
| Ayad Lamdassem | ATH | Olympics | 2008—2020 | 0–1–0 2016 Amsterdam silver: half-marathon team | |
| Yago Lamela | ATH | Olympics | 2000—2004 | 0–0–1 2002 München bronze: long jump | |
| Jan Lammers | ATH | Olympics | 1948 | 0–0–1 1950 Bruxelles bronze: 200 m | |
| Rénelle Lamote | ATH | Olympics | 2016—2024 | 0–2–0 2016 Amsterdam silver: 800 m; 2018 Berlin silver: 800 m | |
| Francine Landre | ATH | Olympics | 1996 | 1–0–0 1994 Helsinki gold: 4×400 m relay | |
| Eeles Landström | ATH | Olympics / Opening Flagbearer | 1952—1960 | 2–0–0 1954 Bern gold: pole vault; 1958 Stockholm gold: pole vault | |
| Martha Langbein-Pensberger | ATH | Olympics | 1960—1964 | 0–1–0 1962 Beograd silver: 4×100 m relay (competed as Martha Pensberger) | |
| Marita Lange | ATH | Olympics | 1968—1972 | 0–1–2 1966 Budapest bronze: shot put; 1969 Athina bronze: shot put; 1971 Helsinki silver: shot put | |
| Lucyna Langer | ATH | Olympics | 1980 | 1–0–0 1982 Athina gold: 100 m hurdles (competed as Lucyna Kałek) | |
| Sonia Lannaman | ATH | Olympics / Non-starter | 1972—1980 | 0–1–0 1978 Praha silver: 4×100 m relay | |
| Jiří Lanský | ATH | Olympics | 1960 | 0–2–0 1954 Bern silver: high jump; 1958 Stockholm silver: high jump | |
| Mario Lanzi | ATH | Olympics | 1936 | 0–1–1 1934 Torino silver: 800 m; 1938 Paris bronze: 800 m | |
| Igor Lapshin | ATH | Olympics | 1988 | 0–0–1 1990 Split bronze: triple jump | |
| Ernst Larsen | ATH | Olympics | 1956 | 0–0–1 1954 Bern bronze: 3000 m steeplechase | |
| Lars Larsson | ATH | Olympics | 1936 | 1–0–0 1938 Paris gold: 3000 m steeplechase | |
| Rune Larsson | ATH | Olympics | 1948—1952 | 0–0–2 1946 Oslo bronze: 400 m hurdles; 1950 Bruxelles bronze: 4×400 m relay | |
| Inna Lasovskaya | ATH | Olympics | 1996—2000 | 0–1–0 1994 Helsinki silver: triple jump | |
| Torbjörn Lassenius | ATH | Olympics | 1956 | 0–1–0 1954 Bern silver: decathlon | |
| Martin Lauer | ATH | Olympics | 1956—1960 | 1–0–0 1958 Stockholm gold: 110 m hurdles | |
| Renaud Lavillenie | ATH | Olympics / Torch Bearer | 2012—2024 | 3–0–1 2010 Barcelona gold: pole vault; 2012 Helsinki gold: pole vault; 2014 Zürich gold: pole vault; 2018 Berlin bronze: pole vault | |
| Julien Le Bas | ATH | Olympics | 1948 | 0–1–0 1946 Oslo silver: 4×100 m relay | |
| Yevgeny Lebedev | ATH | Non-starter | 2004 | 0–1–0 2002 München silver: 4×400 m relay (ran in heats only) | |
| Tatyana Lebedeva | ATH | Olympics | 2000—2012 | 1–0–0 2006 Göteborg gold: triple jump | |
| Serhiy Lebid | ATH | Olympics | 2000—2012 | 0–0–1 2002 München bronze: 5000 m | |
| Franco Leccese | ATH | Olympics | 1952 | 0–1–0 1950 Bruxelles silver: 100 m | |
| Tatsiana Ledauskaya | ATH | Olympics | 1988—1996 | 1–1–0 1990 Split gold: 400 m hurdles, silver: 4×400 m relay (competed for the Soviet Union) | |
| Yrjö Lehtilä | ATH | Olympics | 1948 | 0–0–1 1946 Oslo bronze: shot put | |
| Wilhelm Leichum | ATH | Olympics | 1936 | 2–0–0 1934 Torino gold: long jump; 1938 Paris gold: long jump | |
| Jan Leitner | ATH | Olympics | 1980 | 0–0–1 1982 Athina bronze: long jump | |
| Christophe Lemaitre | ATH | Olympics | 2012—2016 | 4–2–2 2010 Barcelona gold: 100 m, 200 m, and 4×100 m relay; 2012 Helsinki gold: 100 m, bronze: 4×100 m relay; 2014 Zürich silver: 100 m and 200 m, bronze: 4×100 m relay | |
| Giuseppina Leone | ATH | Olympics | 1952—1960 | 0–0–1 1954 Bern bronze: 4×100 m relay | |
| Tõnu Lepik | ATH | Olympics | 1968—1976 | 0–0–1 1969 Athina bronze: long jump | |
| Barbara Lerczak-Janiszewska-Sobotta | ATH | Olympics | 1956—1964 | 2–0–2 1958 Stockholm gold: 200 m, bronze: 4×100 m relay (competed as Barbara Janiszewska); 1962 Beograd gold: 4×100 m relay, bronze: 200 m (competed as Barbara Sobotta) | |
| Sheila Lerwill | ATH | Olympics | 1952 | 1–0–0 1950 Bruxelles gold: high jump | |
| Svetlana Leseva | ATH | Olympics | 1992 | 0–1–0 1986 Stuttgart silver: high jump (competed as Svetlana Isaeva) | |
| Yekaterina Leshchova | ATH | Olympics | 1996 | 1–2–0 1994 Helsinki silver: 4×100 m relay (ran in heats only); 2006 Göteborg gold: 4×100 m relay, silver: 100 m (competed as Yekaterina Grigoryeva) | |
| Eckhard Lesse | ATH | Olympics | 1972 | 0–1–0 1974 Roma silver: marathon | |
| Éloyse Lesueur | ATH | Olympics | 2012 | 2–0–0 2012 Helsinki gold: long jump; 2014 Zürich gold: long jump | |
| Tatyana Levina | ATH | Olympics | 2004 | 0–1–0 2002 München silver: 4×400 m relay (ran in heats only) | |
| Nigel Levine | ATH | Olympics | 2012—2016 | 1–1–0 2012 Helsinki silver: 4×400 m relay; 2014 Zürich gold: 4×400 m relay (ran in heats only) | |
| Marcin Lewandowski | ATH | Olympics | 2008—2020 | 1–2–0 2010 Barcelona gold: 800 m; 2016 Amsterdam silver: 800 m; 2018 Berlin silver: 1500 m | |
| Mark Lewis-Francis | ATH | Olympics | 2004 | 1–1–0 2006 Göteborg gold: 4×100 m relay; 2010 Barcelona silver: 100 m | |
| Denise Lewis | ATH | Olympics | 1996—2004 | 1–0–0 1998 Budapest gold: heptathlon | |
| Les Lewis | ATH | Olympics | 1948—1952 | 1–0–0 1950 Bruxelles gold: 4×400 m relay | |
| Olha Liakhova | ATH | Olympics | 2016 | 0–1–1 2014 Zürich silver: 4×400 m relay (ran in heats only); 2018 Berlin bronze: 800 m | |
| Silke Lichtenhagen | ATH | Olympics | 1996 | 1–0–0 1994 Helsinki gold: 4×100 m relay | |
| Zenon Licznerski | ATH | Olympics | 1976—1980 | 1–0–0 1978 Praha gold: 4×100 m relay | |
| Håkan Lidman | ATH | Olympics | 1936—1948 | 1–1–0 1938 Paris silver: 110 m hurdles; 1946 Oslo gold: 110 m hurdles | |
| Rico Lieder | ATH | Olympics | 1992—1996 | 0–0–1 1990 Split bronze: 4×400 m relay (competed for East Germany) | |
| Kriemhild Limberg-Hausmann | ATH | Olympics | 1960—1964 | 0–0–1 1958 Stockholm bronze: discus throw (competed as Kriemhild Hausmann) | |
| Allan Lindberg | ATH | Olympics | 1948 | 1–0–0 1946 Oslo gold: pole vault | |
| Janin Lindenberg | ATH | Olympics / Non-starter | 2008—2012 | 1–0–0 2010 Barcelona gold: 4×400 m relay | |
| Lennart Lindgren | ATH | Olympics | 1936 | 0–1–0 1938 Paris silver: 4×100 m relay | |
| Lovisa Lindh | ATH | Olympics | 2016 | 0–0–1 2016 Amsterdam bronze: 800 m | |
| Dieter Lindner | ATH | Olympics | 1956—1964 | 1–0–0 1966 Budapest gold: 20 km walk (competed for East Germany) | |
| Joanna Linkiewicz | ATH | Olympics | 2016—2020 | 0–1–0 2016 Amsterdam silver: 400 m hurdles | |
| Viktor Lipsnis | ATH | Olympics | 1960—1964 | 0–2–0 1958 Stockholm silver: shot put; 1962 Beograd silver: shot put | |
| Karel Lismont | ATH | Olympics | 1972—1984 | 1–0–2 1971 Helsinki gold: marathon; 1978 Praha bronze: marathon; 1982 Athina bronze: marathon | |
| Nataliya Lisovskaya | ATH | Olympics | 1988—1992 | 0–1–0 1990 Split silver: shot put (competed for the Soviet Union) | |
| Yury Lituyev | ATH | Olympics | 1952—1956 | 1–2–0 1950 Bruxelles silver: 400 m hurdles; 1954 Bern silver: 400 m hurdles; 1958 Stockholm gold: 400 m hurdles | |
| Valentina Lituyeva | ATH | Olympics | 1952 | 1–1–0 1950 Bruxelles gold: long jump (competed as Valentina Bogdanova); 1958 Stockholm silver: long jump | |
| Sergey Litvinov | ATH | Olympics | 1980—1988 | 0–1–1 1982 Athina bronze: hammer throw; 1986 Stuttgart silver: hammer throw | |
| Judy Livermore-Simpson | ATH | Olympics | 1980—1988 | 0–0–1 1986 Stuttgart bronze: heptathlon (competed as Judy Simpson) | |
| Bo Ljungberg | ATH | Olympics | 1936 | 0–2–0 1934 Torino silver: pole vault; 1938 Paris silver: pole vault | |
| John Ljunggren | ATH | Olympics | 1948—1964 | 1–1–0 1946 Oslo gold: 50 km walk; 1950 Bruxelles silver: 50 km walk | |
| Jorge Llopart | ATH | Olympics / Olympic Flagbearer | 1980—1992 | 1–0–0 1978 Praha gold: 50 km walk | |
| Liliya Lobanova | ATH | Non-starter | 2012 | 0–0–1 2012 Helsinki bronze: 800 m | |
| Sergey Lobastov | ATH | Olympics | 1952 | 0–0–1 1954 Bern bronze: 10 km walk | |
| Tim Lobinger | ATH | Olympics | 1996—2008 | 0–2–1 1998 Budapest silver: pole vault; 2002 München bronze: pole vault; 2006 Göteborg silver: pole vault | |
| Lev Lobodin | ATH | Olympics | 1996—2004 | 0–0–3 1994 Helsinki bronze: decathlon (competed for Ukraine); 1998 Budapest bronze: decathlon (competed for Russia); 2002 München bronze: decathlon (competed for Russia) | |
| Alina Lohvynenko | ATH | Olympics | 2012—2020 | 1–0–0 2012 Helsinki gold: 4×400 m relay | |
| Hermann Lomba | ATH | Olympics | 1996 | 1–0–0 1994 Helsinki gold: 4×100 m relay | |
| Josef Lomický | ATH | Olympics | 1980 | 0–0–1 1978 Praha bronze: 4×400 m relay | |
| Luz Long | ATH | Olympics | 1936 | 0–0–2 1934 Torino bronze: long jump; 1938 Paris bronze: long jump | |
| Stig Lönnqvist | ATH | Olympics | 1972—1976 | 0–0–1 1974 Roma bronze: 4×400 m relay | |
| Miguel Ángel López | ATH | Olympics | 2012—2024 | 1–0–0 2014 Zürich gold: 20 km walk | |
| Doris Lorenz-Müller | ATH | Olympics | 1960—1964 | 0–1–0 1962 Beograd silver: discus throw (competed as Doris Müller) | |
| Stanko Lorger | ATH | Olympics | 1952—1960 | 0–1–0 1958 Stockholm silver: 110 m hurdles | |
| Hartmut Losch | ATH | Olympics | 1964—1972 | 1–1–0 1966 Budapest silver: discus throw (competed for East Germany); 1969 Athina gold: discus throw (competed for East Germany) | |
| Pavel Loskutov | ATH | Olympics | 1996—2008 | 0–1–0 2002 München silver: marathon | |
| Pat Lowe-Cropper | ATH | Olympics | 1968—1972 | 1–1–0 1969 Athina gold: 4×400 m relay (competed as Pat Lowe); 1971 Helsinki silver: 800 m (competed as Pat Lowe) | |
| Eva Lubbers | ATH | Olympics | 2012 | 0–1–0 2012 Helsinki silver: 4×100 m relay | |
| Ralf Lübke | ATH | Olympics | 1984—1988 | 0–1–0 1986 Stuttgart silver: 4×400 m relay | |
| Ion Luchianov | ATH | Olympics | 2004—2012 | 0–0–1 2010 Barcelona bronze: 3000 m steeplechase | |
| Gina Lückenkemper | ATH | Olympics | 2016—2024 | 0–1–3 2016 Amsterdam bronze: 200 m and 4×100 m relay; 2018 Berlin silver: 100 m, bronze: 4×100 m relay | |
| Patrick van Luijk | ATH | Olympics | 2008—2012 | 1–1–0 2012 Helsinki gold: 4×100 m relay, silver: 200 m | |
| Oleksiy Lukashevych | ATH | Olympics / Non-starter | 2000—2004 | 1–0–1 2002 München gold: long jump; 2006 Göteborg bronze: long jump | |
| Ragnar Lundberg | ATH | Olympics | 1948—1956 | 1–2–0 1950 Bruxelles gold: pole vault, silver: 110 m hurdles; 1954 Bern silver: pole vault | |
| Kurt Lundquist | ATH | Olympics | 1948 | 1–0–0 1938 Paris gold: high jump | |
| Jacques Lunis | ATH | Olympics | 1948 | 1–2–0 1946 Oslo gold: 4×400 m relay, silver: 400 m; 1950 Bruxelles silver: 400 m | |
| Jānis Lūsis | ATH | Olympics | 1964—1976 | 4–0–0 1962 Beograd gold: javelin throw; 1966 Budapest gold: javelin throw; 1969 Athina gold: javelin throw; 1971 Helsinki gold: javelin throw | |
| Willy Lust | ATH | Olympics | 1952 | 0–1–0 1950 Bruxelles silver: long jump | |
| Andrea Lynch | ATH | Olympics / Non-starter | 1972—1980 | 0–0–1 1974 Roma bronze: 100 m | |
| Lyudmila Lysenko | ATH | Olympics | 1960 | 0–0–1 1954 Bern bronze: 800 m | |
| Tatyana Lysenko | ATH | Olympics | 2004—2012 | 1–1–0 2006 Göteborg gold: hammer throw; 2010 Barcelona silver: hammer throw | |
| Ydrissa M'Barké | ATH | Olympics | 2008 | 1–0–0 2006 Göteborg gold: 4×400 m relay | |
| Patrick El Mabrouk | ATH | Olympics | 1952 | 0–1–0 1950 Bruxelles silver: 1500 m | |
| Manuela Machado | ATH | Olympics | 1992—2000 | 2–0–0 1994 Helsinki gold: marathon; 1998 Budapest gold: marathon | |
| Remigius Machura | ATH | Olympics | 1988 | 0–0–1 1982 Athina bronze: shot put | |
| Robert Maćkowiak | ATH | Olympics | 1996—2000 | 0–2–0 1998 Budapest silver: 400 m and 4×400 m relay | |
| Tilly van der Made-van der Zwaard | ATH | Olympics | 1964—1968 | 0–0–1 1962 Beograd bronze: 400 m (competed as Tilly van der Zwaard) | |
| Ezio Madonia | ATH | Olympics | 1988—1996 | 0–0–2 1990 Split bronze: 4×100 m relay; 1994 Helsinki bronze: 4×100 m relay | |
| Joice Maduaka | ATH | Olympics | 2000—2004 | 0–1–0 2006 Göteborg silver: 4×100 m relay | |
| Arturo Maffei | ATH | Olympics | 1936 | 0–1–0 1938 Paris silver: long jump | |
| Ciara Mageean | ATH | Olympics | 2016—2020 | 0–0–1 2016 Amsterdam bronze: 1500 m | |
| Émile Maggi | ATH | Olympics | 1948—1952 | 0–1–1 1946 Oslo bronze: 10 km walk; 1950 Bruxelles silver: 10 km walk | |
| Rasmus Mägi | ATH | Olympics | 2012—2024 | 0–1–0 2014 Zürich silver: 400 m hurdles | |
| Walter Mahlendorf | ATH | Olympics | 1960 | 1–0–0 1958 Stockholm gold: 4×100 m relay | |
| Ulrike Maisch | ATH | Olympics | 2004 | 1–0–0 2006 Göteborg gold: marathon | |
| Tomasz Majewski | ATH | Olympics / Closing Flagbearer | 2004—2016 | 1–0–1 2010 Barcelona gold: shot put; 2014 Zürich bronze: shot put | |
| Sergey Makarov | ATH | Olympics | 1996—2008 | 0–1–0 2002 München silver: javelin throw | |
| Piotr Małachowski | ATH | Olympics | 2008—2020 | 2–0–0 2010 Barcelona gold: discus throw; 2016 Amsterdam gold: discus throw | |
| Galina Malchugina | ATH | Olympics | 1988—1996 | 0–1–3 1990 Split bronze: 200 m (competed for the Soviet Union); 1994 Helsinki silver: 4×100 m relay, bronze: 200 m (competed for Russia); 1998 Budapest bronze: 4×100 m relay (competed for Russia) | |
| Christian Malcolm | ATH | Olympics | 2000—2012 | 0–1–0 2010 Barcelona silver: 200 m | |
| Doris Maletzki | ATH | Olympics | 1976 | 1–0–0 1974 Roma gold: 4×100 m relay | |
| Bronisław Malinowski | ATH | Olympics | 1972—1980 | 2–0–0 1974 Roma gold: 3000 m steeplechase; 1978 Praha gold: 3000 m steeplechase | |
| Bogusław Mamiński | ATH | Olympics | 1980—1988 | 0–1–0 1982 Athina silver: 3000 m steeplechase | |
| Patrícia Mamona | ATH | Olympics | 2012—2020 | 1–1–0 2012 Helsinki silver: triple jump; 2016 Amsterdam gold: triple jump | |
| Véronique Mang | ATH | Olympics | 2004—2012 | 0–2–0 2010 Barcelona silver: 100 m and 4×100 m relay | |
| Wiesław Maniak | ATH | Olympics | 1964—1968 | 1–0–0 1966 Budapest gold: 100 m | |
| Mirela Maniani-Tzelili | ATH | Olympics / Opening Flagbearer | 1996—2004 | 1–0–0 2002 München gold: javelin throw (competed as Mirela Maniani for Greece) | |
| Dorothy Manley | ATH | Olympics | 1948 | 1–0–1 1950 Bruxelles gold: 4×100 m relay, bronze: 200 m (competed as Dorothy Hall) | |
| Ari Mannio | ATH | Olympics | 2012—2016 | 0–0–1 2012 Helsinki bronze: javelin throw | |
| Christos Mantikas | ATH | Olympics / Opening Flagbearer | 1932—1936 | 0–0–1 1934 Torino bronze: 400 m hurdles | |
| Natalia Mărășescu | ATH | Olympics | 1976—1980 | 0–2–0 1978 Praha silver: 1500 m and 3000 m | |
| Marcin Marciniszyn | ATH | Olympics | 2004—2012 | 0–0–1 2006 Göteborg bronze: 4×400 m relay (ran in heats only) | |
| Orazio Mariani | ATH | Olympics | 1936 | 0–1–0 1938 Paris silver: 100 m | |
| Brian Mariano | ATH | Olympics | 2012 | 1–0–0 2012 Helsinki gold: 4×100 m relay | |
| Bruno Marie-Rose | ATH | Olympics | 1984—1992 | 1–0–1 1986 Stuttgart bronze: 100 m; 1990 Split gold: 4×100 m relay | |
| André Marie | ATH | Olympics | 1948 | 1–0–0 1950 Bruxelles gold: 110 m hurdles | |
| José Marín | ATH | Olympics | 1980—1992 | 1–1–0 1982 Athina gold: 20 km walk, silver: 50 km walk | |
| Tereza Marinova | ATH | Olympics | 2000 | 0–0–1 1998 Budapest bronze: triple jump | |
| Viktor Markin | ATH | Olympics | 1980 | 0–0–2 1982 Athina bronze: 400 m, bronze: 4×400 m relay | |
| Hristo Markov | ATH | Olympics | 1988—1992 | 1–1–0 1986 Stuttgart gold: triple jump; 1990 Split silver: triple jump | |
| Ilya Markov | ATH | Olympics | 1996—2008 | 1–0–0 1998 Budapest gold: 20 km walk | |
| Jean-Paul Martin du Gard | ATH | Olympics | 1952—1956 | 1–0–0 1954 Bern gold: 4×400 m relay | |
| Álvaro Martín | ATH | Olympics / YOG | 2010—2024 | 1–0–0 2018 Berlin gold: 20 km walk | |
| Bernadette Martin | ATH | Olympics | 1972 | 0–1–0 1969 Athina silver: 4×400 m relay | |
| Diana Martín | ATH | Olympics | 2012—2016 | 0–0–1 2014 Zürich bronze: 3000 m steeplechase | |
| Luis Miguel Martín | ATH | Olympics | 2000—2004 | 0–0–1 2002 München bronze: 3000 m steeplechase | |
| Churandy Martina | ATH | Olympics / Opening Flagbearer / Closing Flagbearer | 2004—2020 | 3–0–1 2012 Helsinki gold: 200 m and 4×100 m relay (competed for the Netherlands); 2016 Amsterdam gold: 100 m (competed for the Netherlands); 2018 Berlin bronze: 4×100 m relay (competed for the Netherlands) | |
| José Manuel Martínez | ATH | Olympics | 2004—2008 | 1–2–0 2002 München gold: 10000 m; 2006 Göteborg silver: 10000 m; 2010 Barcelona silver: marathon | |
| Mayté Martínez | ATH | Olympics | 2000—2004 | 0–1–0 2002 München silver: 800 m | |
| Pascal Martinot-Lagarde | ATH | Olympics | 2016—2020 | 1–0–1 2014 Zürich bronze: 110 m hurdles; 2018 Berlin gold: 110 m hurdles | |
| Anita Márton | ATH | Olympics | 2012—2020 | 0–1–1 2014 Zürich bronze: shot put; 2016 Amsterdam silver: shot put | |
| Claudia Marx | ATH | Olympics | 2004 | 1–0–0 2002 München gold: 4×400 m relay | |
| Ruslan Mashchenko | ATH | Olympics | 1996—2004 | 0–2–0 1998 Budapest silver: 400 m hurdles; 2002 München silver: 4×400 m relay | |
| Yevgeny Maskinskov | ATH | Olympics | 1956 | 1–0–0 1958 Stockholm gold: 50 km walk | |
| Pavel Maslák | ATH | Olympics | 2012—2020 | 1–1–0 2012 Helsinki gold: 400 m; 2016 Amsterdam silver: 400 m | |
| Valentina Maslovskaya | ATH | Olympics | 1960 | 1–0–1 1958 Stockholm gold: 4×100 m relay; 1966 Budapest bronze: 4×100 m relay (competed as Valentina Bolshova) | |
| Valentí Massana | ATH | Olympics | 1992—2000 | 0–0–1 1994 Helsinki bronze: 20 km walk | |
| Kelly Massey | ATH | Olympics | 2016 | 0–0–1 2014 Zürich bronze: 4×400 m relay | |
| Svetlana Masterkova | ATH | Olympics | 1996—2000 | 1–0–0 1998 Budapest gold: 1500 m | |
| Ken Matthews | ATH | Olympics | 1960—1964 | 1–0–0 1962 Beograd gold: 20 km walk | |
| Manfred Matuschewski | ATH | Olympics / Non-starter | 1960—1968 | 2–0–1 1962 Beograd gold: 800 m; 1966 Budapest gold: 800 m (competed for East Germany); 1969 Athina bronze: 800 m (competed for East Germany) | |
| Gisela Mauermayer | ATH | Olympics | 1936 | 1–1–0 1938 Wien gold: discus throw, silver: shot put | |
| Fiona May | ATH | Olympics | 1988—2004 | 0–1–1 1994 Helsinki bronze: long jump (competed for Italy); 1998 Budapest silver: long jump (competed for Italy) | |
| Kévin Mayer | ATH | Olympics | 2012—2020 | 0–1–0 2014 Zürich silver: decathlon | |
| Lisa Mayer | ATH | Olympics / Non-starter | 2016—2024 | 0–0–1 2016 Amsterdam bronze: 4×100 m relay | |
| Volha Mazuronak | ATH | Olympics | 2016—2020 | 2–0–0 2018 Berlin gold: marathon and marathon team | |
| Maksym Mazuryk | ATH | Olympics | 2008—2012 | 0–1–0 2010 Barcelona silver: pole vault | |
| Martial Mbandjock | ATH | Olympics | 2008 | 1–0–2 2010 Barcelona gold: 4×100 m relay, bronze: 100 m and 200 m | |
| Eilish McColgan | ATH | Olympics | 2012—2024 | 0–1–0 2018 Berlin silver: 5000 m | |
| Lee McConnell | ATH | Olympics | 2004—2012 | 0–1–1 2002 München bronze: 400 m; 2010 Barcelona silver: 4×400 m relay | |
| Mike McFarlane | ATH | Olympics | 1980—1988 | 0–0–1 1986 Stuttgart bronze: 4×100 m relay |