Host cities:
| Athlete | Nation(s) | Sport(s) | Role(s) | Era | Notes |
|---|---|---|---|---|---|
| Hans Luber | DIV | Olympics | 1912 | 2–0–0 1926 Budapest DIV gold: platform; 1927 Bologna DIV gold: platform | |
| Alessia Lucchini | SWA | Olympics | 2000 | 0–1–3 1997 Sevilla SWA bronze: team; 1999 İstanbul SWA bronze: duet (competed in technical prelim only) and team; 2000 Helsinki SWA silver: team | |
| Alexander Lüderitz | SWM | Olympics | 1996 | 0–2–0 1997 Sevilla SWM silver: 4×100 m freestyle relay; 2000 Helsinki SWM silver: 4×100 m freestyle relay (swam in heats only) | |
| Linda Ludgrove | SWM | Olympics | 1964 | 0–1–2 1962 Leipzig SWM bronze: 4×100 m medley relay; 1966 Utrecht SWM silver: 100 m backstroke, bronze: 4×100 m medley relay | |
| Stefanie Luiken | SWM | Olympics | 2004 | 0–0–1 2004 Madrid SWM bronze: 4×100 m medley relay | |
| Igor Lukashin | DIV | Olympics | 2000 | 1–2–1 1997 Sevilla DIV silver: synchronized platform; 1999 İstanbul DIV silver: synchronized platform; 2000 Helsinki DIV gold: synchronized platform, bronze: platform | |
| Eskil Lundahl | ATT/SWM | Olympics | 1928—1948 | 1–1–2 1926 Budapest SWM bronze: 100 m backstroke and 4×200 m freestyle relay; 1927 Bologna SWM gold: 100 m backstroke, silver: 4×200 m freestyle relay | |
| Gunilla Lundberg | SWM | Olympics | 1976 | 0–0–1 1974 Wien SWM bronze: 4×100 m medley relay | |
| Martin Lundén | SWM | Olympics | 1948 | 1–0–0 1947 Monte Carlo SWM gold: 4×200 m freestyle relay | |
| Jan Lundin | SWM | Olympics | 1964 | 0–0–3 1962 Leipzig SWM bronze: 4×100 m freestyle relay; 1966 Utrecht SWM bronze: 4×100 m freestyle relay and 4×200 m freestyle relay | |
| Therèse Lundin | SWM | Olympics | 1992 | 0–1–1 1991 Athina SWM bronze: 100 m butterfly; 1993 Sheffield SWM silver: 4×200 m freestyle relay | |
| Marianne Lundquist | SWM | Olympics | 1948—1952 | 0–0–1 1950 Wien SWM bronze: 4×100 m freestyle relay | |
| Noëmi Lung | SWM | Olympics | 1988—1992 | 1–1–1 1987 Strasbourg SWM gold: 400 m medley, silver: 4×200 m freestyle relay, bronze: 200 m medley | |
| Annika Lurz | SWM | Olympics | 2008 | 2–1–0 2006 Budapest SWM gold: 4×100 m freestyle relay and 4×200 m freestyle relay, silver: 200 m freestyle (competed as Annika Liebs) | |
| Thomas Lurz | OWS/SWM | Olympics | 2004—2012 | 5–2–5 2002 Berlin SWM silver: 5 km; 2006 Budapest SWM gold: 5 km and 10 km; 2008 Dubrovnik SWM gold: 10 km, bronze: 5 km and 5 km team; 2010 Budapest SWM gold: 10 km; 2011 Eilat SWM gold: 10 km; 2012 Piombino SWM bronze: 5 km team; 2014 Berlin SWM silver: 10 km, bronze: 5 km and 5 km team | |
| Maurice Lusien | SWM | Olympics | 1948—1952 | 0–1–0 1950 Wien SWM silver: 200 m breaststroke | |
| Hrafnhildur Lúthersdóttir | SWM | Olympics / Closing Flagbearer | 2012—2016 | 0–2–1 2016 London SWM silver: 50 m breaststroke and 100 m breaststroke, bronze: 200 m breaststroke | |
| Remo Lütolf | SWM | Olympics | 2000—2004 | 0–0–1 2000 Helsinki SWM bronze: 50 m breaststroke | |
| Igor Luzhkovsky | SWM | Olympics | 1960 | 1–0–0 1958 Budapest SWM gold: 4×200 m freestyle relay | |
| Marianna Lymperta | OWS/SWM | Olympics | 2000—2012 | 0–0–1 2010 Budapest SWM bronze: 5 km | |
| Dmytro Lysenko | DIV | Olympics | 2000—2004 | 0–0–2 2004 Madrid DIV bronze: synchronized springboard; 2008 Eindhoven DIV bronze: synchronized springboard | |
| Sofiya Lyskun | DIV | Olympics / YOG | 2018—2024 | 1–0–1 2018 Glasgow DIV gold: team; 2020/2021 Budapest DIV bronze: synchronized platform | |
| Annelies Maas | SWM | Olympics | 1976—1980 | 0–3–1 1977 Jönköping SWM silver: 400 m freestyle, 800 m freestyle, and 4×100 m freestyle relay, bronze: 200 m freestyle | |
| Csilla Madarász-Dobay | SWM | Olympics | 1960—1964 | 0–0–1 1962 Leipzig SWM bronze: 4×100 m freestyle relay (competed as Csilla Madarász) | |
| Stefaan Maene | SWM | Olympics | 1992 | 0–0–1 1995 Wien SWM bronze: 100 m backstroke | |
| Riccardo Maestri | SWM | Olympics | 2012 | 0–1–0 2012 Debrecen SWM silver: 4×200 m freestyle relay | |
| Gianluca Maglia | SWM | Olympics | 2012 | 0–2–0 2012 Debrecen SWM silver: 4×100 m freestyle relay (swam in heats only) and 4×200 m freestyle relay | |
| Filippo Magnini | SWM | Olympics | 2004—2016 | 9–5–5 2004 Madrid SWM gold: 100 m freestyle, 4×100 m freestyle relay, and 4×200 m freestyle relay; 2004 Madrid SWM bronze: 200 m freestyle; 2006 Budapest SWM gold: 100 m freestyle, 4×100 m freestyle relay, and 4×200 m freestyle relay, bronze: 200 m freestyle; 2008 Eindhoven SWM gold: 4×200 m freestyle relay, silver: 4×100 m freestyle relay, bronze: 100 m freestyle; 2012 Debrecen SWM gold: 100 m freestyle and 4×100 m medley relay, silver: 4×100 m freestyle relay and 4×200 m freestyle relay; 2014 Berlin SWM bronze: 4×100 m freestyle relay; 2016 London SWM silver: 4×100 m freestyle relay and 4×100 m freestyle mixed relay, bronze: 4×200 m freestyle relay | |
| Per-Alvar Magnusson | SWM | Olympics | 1980 | 0–1–1 1981 Split SWM bronze: 4×200 m freestyle relay; 1983 Roma SWM silver: 4×100 m medley relay (swam in heats only) | |
| László Magyar | SWM | Olympics | 1956 | 0–2–0 1954 Torino SWM silver: 100 m backstroke; 1958 Budapest SWM silver: 4×100 m medley relay | |
| Winfried Mahraun | DIV | Olympics | 1936 | 0–1–0 1934 Magdeburg DIV silver: 3 m springboard | |
| Igor Majcen | SWM | Olympics | 1988—1996 | 1–0–1 1989 Stari Grad SWM gold: 5 km (competed for Yugoslavia); 1993 Sheffield SWM bronze: 1500 m freestyle (competed for Slovenia) | |
| Nače Majčen | SWM | Olympics | 1992 | 1–0–0 1989 Stari Grad SWM gold: 21 km (competed for Yugoslavia) | |
| Kacper Majchrzak | SWM | Olympics | 2012—2020 | 0–0–1 2018 Glasgow SWM bronze: 4×100 m freestyle relay | |
| Jaroslav Makohin | DIV | Olympics | 2000 | 0–1–0 1997 Sevilla DIV silver: platform | |
| Evanthia Makrygianni | SWA | Olympics | 2008 | 0–0–2 2004 Madrid SWA bronze: team Free Routine Combination; 2006 Budapest SWA bronze: duet | |
| Gana Maksimova | SWA | Olympics | 1996 | 3–1–0 1989 Bonn SWA silver: team (competed for the Soviet Union); 1991 Athina SWA gold: team (competed for the Soviet Union); 1993 Sheffield SWA gold: team; 1995 Wien SWA gold: team | |
| Daniel Málek | SWM | Olympics | 1996—2004 | 0–0–2 1997 Sevilla SWM bronze: 100 m breaststroke and 200 m breaststroke | |
| Marcin Maliński | SWM | Olympics | 1992—1996 | 0–1–0 1995 Wien SWM silver: 400 m medley | |
| Grégory Mallet | SWM | Olympics | 2008—2016 | 1–1–2 2006 Budapest SWM bronze: 4×100 m freestyle relay; 2014 Berlin SWM gold: 4×100 m freestyle relay (swam in heats only), silver: 4×100 m medley relay (swam in heats only), bronze: 4×100 m freestyle mixed relay | |
| Hans Malmström | SWM | Olympics | 1936 | 0–0–1 1934 Magdeburg SWM bronze: 200 m breaststroke | |
| Lisa Mamié | SWM | Olympics / YOG | 2014—2024 | 0–1–0 2020/2021 Budapest SWM silver: 200 m breaststroke | |
| Andrei Mamontou | DIV | Olympics | 2004 | 0–0–1 2002 Berlin DIV bronze: synchronized platform | |
| Isabelle Manable | SWA | Non-starter | 1996 | 0–4–0 1991 Athina SWA silver: team; 1993 Sheffield SWA silver: team; 1995 Wien SWA silver: team; 1997 Sevilla SWA silver: team | |
| Florent Manaudou | SWM | Olympics / Athlete Oath Taker / Opening Flagbearer | 2012—2024 | 6–1–0 2014 Berlin SWM gold: 50 m freestyle, 100 m freestyle, 50 m butterfly, and 4×100 m freestyle relay; 2016 London SWM gold: 50 m freestyle and 4×100 m freestyle relay, silver: 4×100 m medley relay | |
| Laure Manaudou | SWM | Olympics / Torch Bearer | 2004—2024 | 9–1–3 2004 Madrid SWM gold: 400 m freestyle, 100 m backstroke, and 4×100 m medley relay; 2006 Budapest SWM gold: 400 m freestyle, 800 m freestyle, 100 m backstroke, and 200 m medley, bronze: 200 m freestyle, 4×200 m freestyle relay, and 4×100 m medley relay; 2008 Eindhoven SWM gold: 200 m backstroke and 4×200 m freestyle relay, silver: 100 m backstroke | |
| Claude Mandonnaud | SWM | Olympics | 1968—1972 | 1–0–1 1966 Utrecht SWM gold: 400 m freestyle; 1974 Wien SWM bronze: 4×100 m freestyle relay | |
| Dimitrios Manganas | SWM | Olympics | 1996—2004 | 0–0–1 2006 Budapest SWM bronze: 4×200 m freestyle relay | |
| Peter Mankoč | SWM | Olympics | 1996—2012 | 0–1–0 2008 Eindhoven SWM silver: 100 m butterfly | |
| Roxana Maracineanu | SWM | Olympics | 2000 | 1–1–2 1997 Sevilla SWM silver: 100 m backstroke, bronze: 200 m backstroke; 1999 İstanbul SWM gold: 200 m backstroke, bronze: 100 m backstroke | |
| Christophe Marchand | SWM | Olympics | 1988—1992 | 0–0–1 1993 Sheffield SWM bronze: 4×200 m freestyle relay | |
| Xavier Marchand | SWM | Olympics | 1996—2000 | 0–1–1 1997 Sevilla SWM silver: 200 m medley; 2000 Helsinki SWM bronze: 200 m medley | |
| Louis Marchant | DIV | Olympics | 1948 | 0–0–1 1947 Monte Carlo DIV bronze: platform | |
| Igor Marchenko | SWM | Olympics | 2000—2004 | 1–0–0 2002 Berlin SWM gold: 4×100 m medley relay | |
| Maria Marconi | DIV | Olympics | 2000—2016 | 0–0–2 2002 Berlin DIV bronze: synchronized springboard; 2006 Budapest DIV bronze: 1 m springboard | |
| Nicola Marconi | DIV | Olympics | 2000—2008 | 3–1–3 1997 Sevilla DIV bronze: synchronized springboard; 1999 İstanbul DIV gold: synchronized springboard; 2002 Berlin DIV gold: 1 m springboard, bronze: synchronized springboard; 2004 Madrid DIV gold: synchronized springboard, silver: 1 m springboard; 2006 Budapest DIV bronze: synchronized springboard | |
| Tommaso Marconi | DIV | Olympics | 2004—2008 | 1–0–2 2002 Berlin DIV bronze: synchronized springboard; 2004 Madrid DIV gold: synchronized springboard; 2006 Budapest DIV bronze: synchronized springboard | |
| Délphine Maréchal | SWA | Olympics | 1996 | 0–3–0 1991 Athina SWA silver: team; 1993 Sheffield SWA silver: team; 1997 Sevilla SWA silver: team | |
| Ivette María | SWM | Olympics | 1996—2000 | 0–0–1 1995 Wien SWM bronze: 4×100 m medley relay | |
| Luca Marin | SWM | Olympics | 2004—2016 | 0–3–0 2004 Madrid SWM silver: 400 m medley; 2006 Budapest SWM silver: 400 m medley; 2008 Eindhoven SWM silver: 400 m medley | |
| Matjaž Markič | SWM | Olympics | 2008 | 0–0–2 2004 Madrid SWM bronze: 50 m breaststroke; 2006 Budapest SWM bronze: 50 m breaststroke | |
| Aleksey Markovsky | SWM | Olympics | 1980 | 5–0–1 1981 Split SWM gold: 100 m butterfly, 4×100 m freestyle relay, and 4×100 m medley relay; 1983 Roma SWM gold: 4×100 m freestyle relay and 4×100 m medley relay, bronze: 100 m butterfly | |
| Valentina Marocchi | DIV | Olympics | 2004—2008 | 0–0–2 2004 Madrid DIV bronze: platform and synchronized platform | |
| Melanie Marshall | SWM | Olympics | 2004—2008 | 1–1–1 2006 Budapest SWM gold: 4×100 m medley relay, bronze: 200 m backstroke; 2008 Eindhoven SWM silver: 4×200 m freestyle relay | |
| Margot Marsman | SWM | Olympics | 1948 | 0–1–0 1947 Monte Carlo SWM silver: 4×100 m freestyle relay | |
| John Martin-Dye | SWM | Olympics | 1960—1964 | 0–1–0 1962 Leipzig SWM silver: 4×100 m freestyle relay | |
| Yana Martynova | SWM | Olympics | 2004—2012 | 0–0–1 2008 Eindhoven SWM bronze: 400 m medley | |
| Chiara Masini Luccetti | SWM | Olympics | 2016 | 1–0–0 2014 Berlin SWM gold: 4×200 m freestyle relay | |
| Charlotte Massardier | SWA | Olympics | 1996—2000 | 0–5–1 1993 Sheffield SWA silver: team; 1995 Wien SWA silver: team; 1997 Sevilla SWA silver: duet (competed in technical prelim only) and team; 1999 İstanbul SWA silver: team; 2000 Helsinki SWA bronze: team | |
| Lou Massenberg | DIV | YOG | 2018 | 1–2–1 2018 Glasgow DIV gold: synchronized springboard, silver: team; 2020/2021 Budapest DIV silver: mixed synchronized springboard, bronze: Team Event | |
| Rie Mastenbroek | SWM | Olympics | 1936 | 3–1–0 1934 Magdeburg SWM gold: 400 m freestyle, 100 m backstroke, and 4×100 m freestyle relay, silver: 100 m freestyle | |
| Lothar Matthes | DIV | Olympics | 1968—1972 | 1–0–0 1970 Barcelona DIV gold: platform | |
| Roland Matthes | SWM | Olympics | 1968—1976 | 5–2–3 1970 Barcelona SWM gold: 100 m backstroke, 200 m backstroke, and 4×100 m medley relay, silver: 100 m freestyle, bronze: 4×100 m freestyle relay and 4×200 m freestyle relay; 1974 Wien SWM gold: 100 m backstroke and 200 m backstroke, silver: 100 m butterfly, bronze: 4×100 m freestyle relay | |
| Ida Mattsson-Marko-Varga | SWM | Olympics | 2004—2016 | 1–1–4 2000 Helsinki SWM gold: 4×100 m freestyle relay (swam in heats only) (competed as Ida Mattsson); 2002 Berlin SWM bronze: 4×200 m freestyle relay (competed as Ida Mattsson); 2004 Madrid SWM bronze: 4×100 m freestyle relay (swam in heats only) (competed as Ida Mattsson); 2008 Eindhoven SWM bronze: 4×100 m freestyle relay (competed as Ida Marko-Varga); 2012 Debrecen SWM silver: 4×100 m freestyle relay (competed as Ida Marko-Varga); 2016 London SWM bronze: 4×100 m freestyle relay (competed as Ida Marko-Varga) | |
| Angela Maurer | OWS | Olympics | 2008—2012 | 2–4–4 1999 İstanbul SWM silver: 25 km; 2002 Berlin SWM silver: 10 km; 2004 Madrid SWM bronze: 10 km; 2006 Budapest SWM gold: 10 km and 25 km; 2010 Budapest SWM silver: 25 km, bronze: 10 km; 2012 Piombino SWM silver: 10 km, bronze: 5 km team; 2014 Berlin SWM bronze: 25 km | |
| Eve Maurer | SWM | Olympics | 1960 | 0–1–0 1958 Budapest SWM silver: 4×100 m medley relay (competed as Eve Usmees) | |
| Viktor Mazanov | SWM | Olympics | 1964—1972 | 2–1–1 1966 Utrecht SWM gold: 4×100 m medley relay, silver: 4×100 m freestyle relay; 1970 Barcelona SWM gold: 4×100 m freestyle relay, bronze: 4×100 m medley relay (swam in heats only) | |
| Raimundas Mažuolis | SWM | Olympics / Opening Flagbearer | 1988—1996 | 0–0–2 1989 Bonn SWM bronze: 100 m freestyle (competed for the Soviet Union); 1993 Sheffield SWM bronze: 50 m freestyle (competed for Lithuania) | |
| Caitlin McClatchey | SWM | Olympics | 2004—2012 | 0–1–1 2006 Budapest SWM bronze: 400 m freestyle; 2008 Eindhoven SWM silver: 4×200 m freestyle relay | |
| Jean McDowall | SWM | Olympics | 1928 | 0–1–0 1931 Paris SWM silver: 4×100 m freestyle relay | |
| Bobby McGregor | SWM | Olympics | 1964—1968 | 1–1–0 1962 Leipzig SWM silver: 4×100 m freestyle relay; 1966 Utrecht SWM gold: 100 m freestyle | |
| Sycerika McMahon | SWM | Olympics | 2012 | 0–1–0 2012 Debrecen SWM silver: 50 m breaststroke | |
| Gavin Meadows | SWM | Olympics | 2004 | 1–1–0 1997 Sevilla SWM gold: 4×200 m freestyle relay; 1999 İstanbul SWM silver: 4×200 m freestyle relay | |
| Chris Mears | DIV | Olympics | 2012—2016 | 1–1–0 2016 London DIV gold: synchronized springboard; 2018 Edinburgh DIV silver: synchronized springboard | |
| Jolande van der Meer | SWM | Olympics | 1984 | 0–1–1 1983 Roma SWM bronze: 4×200 m freestyle relay; 1985 Sofia SWM silver: 4×200 m freestyle relay | |
| Maud van der Meer | SWM | Olympics | 2016 | 2–1–0 2014 Berlin SWM silver: 4×100 m freestyle relay; 2016 London SWM gold: 4×100 m freestyle relay and 4×100 m freestyle mixed relay | |
| Folkert Meeuw | SWM | Olympics / Non-starter | 1968—1976 | 3–2–1 1970 Barcelona SWM gold: 4×200 m freestyle relay, silver: 200 m butterfly and 4×100 m freestyle relay; 1974 Wien SWM gold: 4×200 m freestyle relay and 4×100 m medley relay, bronze: 100 m butterfly | |
| Helge Meeuw | SWM | Olympics | 2004—2012 | 1–2–0 2006 Budapest SWM gold: 50 m backstroke; 2012 Debrecen SWM silver: 100 m backstroke and 4×100 m medley relay | |
| Annika Mehlhorn | SWM | Olympics | 2004 | 0–1–1 2002 Berlin SWM bronze: 200 m butterfly; 2006 Budapest SWM silver: 4×100 m medley relay | |
| Kersten Meier | SWM | Olympics | 1972 | 2–0–0 1974 Wien SWM gold: 4×100 m freestyle relay and 4×200 m freestyle relay (swam in heats only) | |
| Rūta Meilutytė | SWM | Olympics / YOG | 2012—2024 | 2–1–0 2014 Berlin SWM gold: 50 m breaststroke; 2016 London SWM gold: 100 m breaststroke; 2018 Glasgow SWM silver: 100 m breaststroke | |
| Katrin Meißner | SWM | Olympics | 1988—2000 | 8–4–1 1987 Strasbourg SWM gold: 4×100 m freestyle relay, silver: 50 m freestyle (competed for East Germany); 1989 Bonn SWM gold: 100 m freestyle, 4×100 m freestyle relay, and 4×100 m medley relay, bronze: 50 m freestyle (competed for East Germany); 1991 Athina SWM silver: 4×100 m freestyle relay and 4×100 m medley relay (competed for Germany); 1997 Sevilla SWM gold: 4×100 m freestyle relay and 4×100 m medley relay (competed for Germany); 1999 İstanbul SWM gold: 4×100 m freestyle relay, silver: 4×100 m medley relay (competed for Germany); 2002 Berlin SWM gold: 4×100 m freestyle relay (competed for Germany) | |
| Manuela Melchiorri | SWM | Olympics | 1988—1992 | 0–0–2 1989 Bonn SWM bronze: 400 m freestyle and 4×200 m freestyle relay | |
| Gemma Mengual | SWA | Olympics | 2000—2016 | 5–6–4 2000 Helsinki SWA bronze: solo and duet; 2002 Berlin SWA silver: duet and team, bronze: solo; 2004 Madrid SWA gold: team Free Routine Combination, silver: duet, bronze: solo; 2006 Budapest SWA silver: solo, duet, and team Free Routine Combination; 2008 Eindhoven SWA gold: solo, duet, team Free, and team Free Routine Combination | |
| Jenny Mensing | SWM | Olympics | 2012—2016 | 2–1–2 2010 Budapest SWM bronze: 100 m backstroke and 4×100 m medley relay; 2012 Debrecen SWM gold: 100 m backstroke and 4×100 m medley relay, silver: 200 m backstroke | |
| Wieger Mensonides | SWM | Olympics | 1960—1964 | 0–0–1 1962 Leipzig SWM bronze: 4×100 m medley relay | |
| Roger-Philippe Menu | SWM | Olympics | 1972 | 0–2–0 1970 Barcelona SWM silver: 100 m breaststroke and 4×100 m medley relay | |
| Emanuele Merisi | SWM | Olympics | 1992—2004 | 0–2–3 1993 Sheffield SWM bronze: 200 m backstroke; 1995 Wien SWM bronze: 4×200 m freestyle relay; 1997 Sevilla SWM silver: 200 m backstroke; 1999 İstanbul SWM bronze: 200 m backstroke; 2000 Helsinki SWM silver: 200 m backstroke | |
| Nataliya Meshcheryakova | SWM | Olympics | 1992—1996 | 1–2–2 1993 Sheffield SWM silver: 4×100 m medley relay, bronze: 4×100 m freestyle relay (competed for Russia); 1997 Sevilla SWM gold: 50 m freestyle, silver: 4×100 m medley relay, bronze: 4×100 m freestyle relay (competed for Russia) | |
| Malia Metella | SWM | Olympics | 2004—2008 | 3–1–1 2004 Madrid SWM gold: 100 m freestyle, 4×100 m freestyle relay, and 4×100 m medley relay, silver: 100 m butterfly; 2006 Budapest SWM bronze: 4×100 m freestyle relay | |
| Mehdy Metella | SWM | Olympics / YOG | 2010—2020 | 3–3–2 2012 Debrecen SWM gold: 4×100 m freestyle relay (swam in heats only); 2014 Berlin SWM gold: 4×100 m freestyle relay, silver: 4×100 m medley relay; 2016 London SWM silver: 4×100 m medley relay, bronze: 100 m butterfly; 2018 Glasgow SWM gold: 4×100 m freestyle mixed relay, silver: 100 m butterfly, bronze: 100 m freestyle | |
| Caren Metschuck | SWM | Olympics | 1980 | 3–0–0 1981 Split SWM gold: 100 m freestyle, 4×100 m freestyle relay, and 4×100 m medley relay | |
| Heiko Meyer | DIV | Olympics | 2000—2004 | 2–6–1 1997 Sevilla DIV bronze: platform; 1999 İstanbul DIV gold: synchronized platform, silver: platform; 2000 Helsinki DIV silver: platform; 2002 Berlin DIV gold: platform; 2004 Madrid DIV silver: platform and synchronized platform; 2006 Budapest DIV silver: platform and synchronized platform | |
| William Meynard | SWM | Olympics | 2016 | 2–1–1 2010 Budapest SWM gold: 4×100 m medley relay (swam in heats only), silver: 4×100 m freestyle relay, bronze: 100 m freestyle; 2016 London SWM gold: 4×100 m freestyle relay | |
| Clément Mignon | SWM | Olympics | 2016—2020 | 2–0–3 2014 Berlin SWM gold: 4×100 m freestyle relay (swam in heats only), bronze: 4×100 m freestyle mixed relay; 2016 London SWM gold: 4×100 m freestyle relay, bronze: 100 m freestyle and 4×100 m freestyle mixed relay | |
| Nataliya Mikhaylova | SWM | Olympics | 1964 | 0–1–0 1966 Utrecht SWM silver: 4×100 m medley relay | |
| Vladimir Mikheyev | SWM | Olympics | 1976 | 0–1–0 1974 Wien SWM silver: 4×200 m freestyle relay (swam in heats only) | |
| Kristóf Milák | SWM | Olympics / YOG / Closing Flagbearer | 2018—2024 | 3–1–0 2018 Glasgow SWM gold: 200 m butterfly; 2020/2021 Budapest SWM gold: 100 m butterfly and 200 m butterfly; 2022 Rome SWM silver: 100 m freestyle | |
| Hannah Miley | SWM | Olympics | 2008—2016 | 1–1–4 2010 Budapest SWM gold: 400 m medley, bronze: 200 m medley and 4×200 m freestyle relay; 2016 London SWM silver: 400 m medley, bronze: 200 m medley; 2018 Glasgow SWM bronze: 400 m medley | |
| Kostiantyn Miliaiev | DIV | Olympics | 2008 | 0–0–1 2006 Budapest DIV bronze: platform | |
| John Mills | SWM | Olympics | 1972—1976 | 0–0–2 1977 Jönköping SWM bronze: 100 m butterfly and 4×100 m medley relay | |
| Stephen Milne | SWM | Olympics | 2016 | 2–0–1 2014 Berlin SWM gold: 4×100 m medley relay (swam in heats only); 2018 Glasgow SWM gold: 4×200 m freestyle relay (swam in heats only), bronze: 4×200 m freestyle mixed relay | |
| Miloš Milošević | SWM | Olympics | 1996—2000 | 0–1–1 1993 Sheffield SWM bronze: 100 m butterfly; 1999 İstanbul SWM silver: 50 m butterfly | |
| Hanna Miluska | SWM | Olympics | 2004 | 0–1–0 2002 Berlin SWM silver: 5 km | |
| Andrey Minakov | SWM | Olympics / YOG | 2018—2020 | 1–1–1 2020/2021 Budapest SWM gold: 4×100 m freestyle relay, silver: 4×100 m medley relay, bronze: 100 m freestyle | |
| Gianni Minervini | SWM | Olympics | 1984—1992 | 0–0–4 1985 Sofia SWM bronze: 4×100 m medley relay; 1987 Strasbourg SWM bronze: 100 m breaststroke; 1989 Bonn SWM bronze: 4×100 m medley relay; 1991 Athina SWM bronze: 100 m breaststroke | |
| Viktor Minibayev | DIV | Olympics | 2012—2020 | 5–5–1 2010 Budapest DIV silver: synchronized platform; 2012 Eindhoven DIV silver: platform and synchronized platform; 2014 Berlin DIV gold: platform and Team Event; 2016 London DIV gold: Team Event, silver: platform; 2018 Edinburgh DIV gold: synchronized platform; 2020/2021 Budapest DIV gold: Team Event, silver: synchronized platform, bronze: platform | |
| Christian Minotti | SWM | Olympics | 2000—2004 | 0–1–0 2002 Berlin SWM silver: 1500 m freestyle | |
| Donald Miranda | DIV | Olympics | 2000 | 1–0–1 1997 Sevilla DIV bronze: synchronized springboard; 1999 İstanbul DIV gold: synchronized springboard | |
| Yelena Miroshina | DIV | Olympics | 1988—1992 | 2–0–0 1987 Strasbourg DIV gold: platform (competed for the Soviet Union); 1991 Athina DIV gold: platform (competed for the Soviet Union) | |
| Arsens Miskarovs | SWM | Olympics | 1980 | 0–3–0 1977 Jönköping SWM silver: 200 m breaststroke; 1981 Split SWM silver: 100 m breaststroke and 200 m breaststroke | |
| György Mitró | SWM | Olympics | 1948 | 1–1–1 1947 Monte Carlo SWM gold: 1500 m freestyle, silver: 400 m freestyle, bronze: 4×200 m freestyle relay | |
| Alice Mizzau | SWM | Olympics | 2012—2016 | 2–1–2 2012 Debrecen SWM gold: 4×200 m freestyle relay, silver: 4×100 m medley relay, bronze: 4×100 m freestyle relay; 2014 Berlin SWM gold: 4×200 m freestyle relay, bronze: 4×100 m freestyle relay | |
| Diana Mocanu | SWM | Olympics | 2000 | 0–3–2 1999 İstanbul SWM bronze: 100 m butterfly; 2000 Helsinki SWM silver: 50 m backstroke, 100 m backstroke, and 200 m backstroke, bronze: 4×100 m medley relay | |
| Anke Möhring | SWM | Olympics | 1988 | 5–1–1 1985 Sofia SWM silver: 400 m freestyle, bronze: 800 m freestyle; 1987 Strasbourg SWM gold: 800 m freestyle and 4×200 m freestyle relay; 1989 Bonn SWM gold: 400 m freestyle, 800 m freestyle, and 4×200 m freestyle relay | |
| Aurore Mongel | SWM | Olympics | 2004—2008 | 3–0–3 2004 Madrid SWM gold: 4×100 m freestyle relay and 4×100 m medley relay; 2006 Budapest SWM bronze: 4×100 m freestyle relay and bronze: 4×200 m freestyle relay; 2008 Eindhoven SWM gold: 200 m butterfly, bronze: 100 m butterfly | |
| Ana Montero | SWA | Olympics | 2004 | 1–2–0 2002 Berlin SWA silver: team; 2004 Madrid SWA gold: team Free Routine Combination, silver: team Free | |
| Irene Montrucchio | SWA | Non-starter | 2012 | 2–1–0 2010 Budapest SWA silver: team Free Routine Combination; 2012 Eindhoven SWA gold: team Free and team Free Routine Combination | |
| Guy Montserret | SWM | Olympics | 1956 | 0–1–0 1954 Torino SWM silver: 4×200 m freestyle relay | |
| Jaime Monzo | SWM | Olympics | 1968 | 0–1–0 1966 Utrecht SWM silver: 200 m backstroke | |
| Adrian Moorhouse | SWM | Olympics | 1984—1992 | 4–3–2 1981 Split SWM bronze: 200 m breaststroke; 1983 Roma SWM gold: 200 m breaststroke, silver: 100 m breaststroke; 1985 Sofia SWM gold: 100 m breaststroke; 1987 Strasbourg SWM gold: 100 m breaststroke, silver: 4×100 m medley relay, bronze: 200 m breaststroke; 1989 Bonn SWM gold: 100 m breaststroke; 1991 Athina SWM silver: 100 m breaststroke | |
| Ivanka Moralieva | SWM | Olympics | 2000—2004 | 0–0–1 2004 Madrid SWM bronze: 25 km | |
| Martina Moravcová | SWM | Olympics | 1992—2008 | 3–10–1 1993 Sheffield SWM silver: 100 m freestyle (competed for Slovakia); 1997 Sevilla SWM silver: 100 m freestyle, 100 m butterfly, and 200 m medley (competed for Slovakia); 2000 Helsinki SWM gold: 100 m butterfly, silver: 100 m freestyle and 200 m freestyle, bronze: 50 m butterfly (competed for Slovakia); 2002 Berlin SWM gold: 100 m butterfly, silver: 50 m freestyle and 100 m freestyle (competed for Slovakia); 2004 Madrid SWM gold: 100 m butterfly, silver: 50 m butterfly (competed for Slovakia); 2006 Budapest SWM silver: 100 m butterfly (competed for Slovakia) | |
| Mady Moreau | DIV | Olympics | 1948—1952 | 2–0–0 1947 Monte Carlo DIV gold: 3 m springboard; 1950 Wien DIV gold: 3 m springboard | |
| Bob Morgan | DIV | Olympics | 1984—1996 | 0–1–1 1991 Athina DIV bronze: platform; 1993 Sheffield DIV silver: platform | |
| Gerald Mörken | SWM | Olympics | 1984 | 3–1–2 1977 Jönköping SWM gold: 100 m breaststroke, 200 m breaststroke, and 4×100 m medley relay; 1981 Split SWM bronze: 100 m breaststroke; 1983 Roma SWM silver: 4×100 m medley relay, bronze: 100 m breaststroke | |
| Gisela Morón | SWA | Non-starter | 2008 | 2–3–0 2004 Madrid SWA gold: team Free Routine Combination, silver: team Free; 2006 Budapest SWA silver: team Free and team Free Routine Combination; 2008 Eindhoven SWA gold: team Free Routine Combination | |
| Vladimir Morozov | SWM | Olympics | 2012—2020 | 2–4–1 2014 Berlin SWM gold: 50 m backstroke, silver: 4×100 m freestyle relay and 4×100 m freestyle mixed relay, bronze: 4×100 m medley mixed relay; 2018 Glasgow SWM gold: 4×100 m freestyle relay, silver: 4×100 m medley relay and 4×100 m medley mixed relay | |
| Alain Mosconi | SWM | Olympics | 1968—1972 | 0–1–1 1966 Utrecht SWM bronze: 400 m freestyle; 1970 Barcelona SWM silver: 4×100 m medley relay | |
| Kurt Mrkwicka | DIV | Olympics | 1960—1964 | 1–0–0 1962 Leipzig DIV gold: 3 m springboard | |
| Camille Muffat | SWM | Olympics | 2008—2012 | 0–1–2 2006 Budapest SWM bronze: 4×100 m freestyle relay (swam in heats only); 2008 Eindhoven SWM bronze: 200 m medley; 2010 Budapest SWM silver: 4×200 m freestyle relay | |
| Lotte Mühe | SWM | Olympics | 1928 | 0–1–0 1927 Bologna SWM silver: 200 m breaststroke | |
| Marianne Muis | SWM | Olympics | 1988—1996 | 0–5–2 1987 Strasbourg SWM silver: 4×100 m freestyle relay; 1989 Bonn SWM silver: 200 m freestyle, 200 m medley, 4×100 m freestyle relay, and 4×200 m freestyle relay, bronze: 100 m freestyle and 4×100 m medley relay | |
| Mildred Muis | SWM | Olympics | 1988—1992 | 0–4–1 1985 Sofia SWM silver: 4×200 m freestyle relay; 1987 Strasbourg SWM silver: 4×100 m freestyle relay; 1989 Bonn SWM silver: 4×100 m freestyle relay and 4×200 m freestyle relay, bronze: 200 m medley | |
| Yury Mukhin | SWM | Olympics | 1992 | 1–0–0 1993 Sheffield SWM gold: 4×200 m freestyle relay (competed for Russia) | |
| Olha Mukomol | SWM | Olympics | 2000—2004 | 0–1–2 2000 Helsinki SWM bronze: 50 m freestyle; 2002 Berlin SWM bronze: 4×100 m medley relay; 2004 Madrid SWM silver: 4×100 m medley relay | |
| Alfred Müller | SWM | Olympics | 1968 | 0–1–0 1966 Utrecht SWM silver: 4×200 m freestyle relay | |
| Aurélie Muller | OWS | Olympics | 2008—2016 | 1–0–0 2016 Hoorn SWM gold: 10 km | |
| György Müller | SWM | Olympics | 1960 | 0–0–1 1958 Budapest SWM bronze: 4×200 m freestyle relay | |
| Arthur Mund | DIV | Olympics | 1928 | 1–0–0 1926 Budapest DIV gold: 3 m springboard | |
| Rafa Muñoz | SWM | Olympics | 2008 | 2–0–2 2008 Eindhoven SWM bronze: 50 m butterfly and 100 m butterfly; 2010 Budapest SWM gold: 50 m butterfly; 2012 Debrecen SWM gold: 50 m butterfly | |
| Ross Murdoch | SWM | Olympics | 2016—2020 | 4–3–1 2014 Berlin SWM gold: 4×100 m medley relay (swam in heats only) and 4×100 m medley mixed relay (swam in heats only), silver: 100 m breaststroke and 200 m breaststroke; 2016 London SWM gold: 200 m breaststroke and 4×100 m medley relay (swam in heats only), silver: 100 m breaststroke, bronze: 50 m breaststroke | |
| Gráinne Murphy | SWM | Olympics | 2012 | 0–1–0 2010 Budapest SWM silver: 1500 m freestyle | |
| Ágnes Mutina | SWM | Olympics | 2004—2012 | 1–1–2 2008 Eindhoven SWM bronze: 200 m freestyle; 2010 Budapest SWM gold: 4×200 m freestyle relay, bronze: 200 m freestyle; 2012 Debrecen SWM silver: 4×200 m freestyle relay | |
| Elsa N'Guessan | SWM | Olympics | 2004 | 0–1–0 2004 Madrid SWM silver: 4×200 m freestyle relay | |
| Richard Nagy | OWS/SWM | Olympics | 2016—2020 | 0–1–0 2016 London SWM silver: 400 m medley | |
| Alfred Nakache | SWM | Olympics | 1936—1948 | 0–1–0 1938 London SWM silver: 4×200 m freestyle relay | |
| Rozaliya Nasretdinova | SWM | Olympics / YOG | 2014—2016 | 0–0–1 2018 Glasgow SWM bronze: 4×100 m freestyle mixed relay (swam in heats only) | |
| Yevgeny Natsvin | SWM | Olympics | 2004 | 0–1–0 2004 Madrid SWM silver: 4×200 m freestyle relay | |
| Sándor Németh | SWM | Olympics | 1948 | 0–1–0 1947 Monte Carlo SWM silver: 200 m breaststroke | |
| Vladimir Nemshilov | SWM | Olympics | 1968 | 0–0–2 1970 Barcelona SWM bronze: 100 m butterfly and 4×100 m medley relay | |
| Margarita Nesterova | SWM | Olympics | 2012 | 0–1–0 2014 Berlin SWM silver: 4×100 m freestyle mixed relay | |
| Alice Nesti | SWM | Olympics | 2012 | 1–0–1 2012 Debrecen SWM gold: 4×200 m freestyle relay, bronze: 4×100 m freestyle relay (swam in heats only) | |
| Robin Neumann | SWM | Olympics / YOG | 2014—2016 | 0–1–1 2016 London SWM bronze: 4×200 m freestyle relay; 2020/2021 Budapest SWM silver: 4×100 m freestyle relay (swam in heats only) | |
| Laurent Neuville | SWM | Olympics | 1984—1988 | 0–1–0 1989 Bonn SWM silver: 4×100 m freestyle relay | |
| Gal Nevo | SWM | Olympics | 2008—2016 | 0–1–1 2010 Budapest SWM bronze: 400 m medley; 2016 London SWM silver: 200 m medley | |
| Neri Niagkouara | SWM | Olympics | 2004—2012 | 0–0–3 2004 Madrid SWM bronze: 100 m freestyle; 2006 Budapest SWM bronze: 100 m freestyle; 2012 Debrecen SWM bronze: 50 m freestyle | |
| Benny Nielsen | SWM | Olympics | 1988 | 0–2–1 1985 Sofia SWM silver: 200 m butterfly; 1987 Strasbourg SWM silver: 200 m butterfly, bronze: 100 m butterfly | |
| Mette Nørskov Nielsen | SWM | Olympics | 1992—1996 | 0–0–1 1991 Athina SWM bronze: 4×100 m freestyle relay | |
| Mie Ø. Nielsen | SWM | Olympics | 2012—2016 | 3–2–2 2014 Berlin SWM gold: 100 m backstroke and 4×100 m medley relay, bronze: 50 m backstroke; 2016 London SWM gold: 100 m backstroke, silver: 50 m backstroke; 2018 Glasgow SWM silver: 4×100 m medley relay, bronze: 4×100 m freestyle relay | |
| Susanne Nielsson | SWM | Olympics | 1976—1980 | 0–1–0 1977 Jönköping SWM silver: 200 m breaststroke | |
| Moniek Nijhuis | SWM | Olympics | 2012 | 0–0–1 2014 Berlin SWM bronze: 50 m breaststroke | |
| Boris Nikitin | SWM | Olympics | 1956—1960 | 1–1–0 1958 Budapest SWM gold: 4×200 m freestyle relay, silver: 400 m freestyle | |
| Volodymyr Nikolaichuk | SWM | Olympics | 1996—2004 | 1–1–1 2000 Helsinki SWM silver: 100 m backstroke, bronze: 4×100 m medley relay; 2004 Madrid SWM gold: 4×100 m medley relay | |
| Gennady Nikolayev | SWM | Olympics | 1956—1960 | 1–0–0 1958 Budapest SWM gold: 4×200 m freestyle relay | |
| Malin Nilsson | SWM | Olympics | 1992—1996 | 0–3–0 1993 Sheffield SWM silver: 4×100 m freestyle relay and 4×200 m freestyle relay; 1995 Wien SWM silver: 200 m freestyle | |
| Suzanne Nilsson | SWM | Olympics / Non-starter | 1984—1988 | 0–0–1 1985 Sofia SWM bronze: 4×200 m freestyle relay | |
| Ann-Margret Nirling | DIV | Olympics | 1936 | 0–1–0 1938 London DIV silver: platform | |
| Carola Nitschke | SWM | Olympics | 1976 | 1–1–0 1977 Jönköping SWM gold: 4×100 m medley relay, silver: 100 m breaststroke | |
| Sylvie Le Noach | SWM | Olympics | 1972—1976 | 0–0–1 1974 Wien SWM bronze: 4×100 m freestyle relay | |
| Ute Noack | SWM | Olympics | 1964 | 1–1–0 1962 Leipzig SWM gold: 4×100 m medley relay, silver: 100 m butterfly (competed for East Germany) | |
| Peter Nocke | SWM | Olympics | 1976 | 9–1–0 1974 Wien SWM gold: 100 m freestyle, 200 m freestyle, 4×100 m freestyle relay, 4×200 m freestyle relay, and 4×100 m medley relay; 1977 Jönköping SWM gold: 100 m freestyle, 200 m freestyle, 4×100 m freestyle relay, and 4×100 m medley relay, silver: 4×200 m freestyle relay | |
| Kathleen Nord | SWM | Olympics | 1988 | 5–1–2 1983 Roma SWM gold: 400 m medley, silver: 200 m medley; 1985 Sofia SWM gold: 200 m medley and 400 m medley; 1987 Strasbourg SWM gold: 200 m butterfly, bronze: 400 m medley; 1989 Bonn SWM gold: 200 m butterfly, bronze: 100 m butterfly | |
| Inger Nordbø | DIV | Olympics | 1936—1948 | 0–0–2 1934 Magdeburg SWM bronze: 200 m breaststroke, DIV bronze: platform (competed as Inger Kragh) | |
| Sara Nordenstam | SWM | Olympics | 2008—2012 | 1–1–0 2010 Budapest SWM silver: 200 m breaststroke; 2012 Debrecen SWM gold: 200 m breaststroke | |
| Bengt Nordwall | SWM | Olympics | 1960—1964 | 0–0–1 1962 Leipzig SWM bronze: 4×100 m freestyle relay | |
| Yevgeny Novikov | SWM | Olympics | 1964 | 1–0–0 1966 Utrecht SWM gold: 4×200 m freestyle relay | |
| Olga Novokshchenova | SWA | Olympics | 1996—2004 | 6–0–0 1993 Sheffield SWA gold: team; 1995 Wien SWA gold: team; 1997 Sevilla SWA gold: team; 1999 İstanbul SWA gold: team; 2000 Helsinki SWA gold: team; 2004 Madrid SWA gold: team Free | |
| Anna Ntountounaki | SWM | Olympics | 2016—2024 | 1–0–0 2020/2021 Budapest SWM gold: 100 m butterfly | |
| Letizia Nuzzo | SWA | Olympics | 1996 | 0–0–1 1997 Sevilla SWA bronze: team | |
| Eva Nyberg | SWM | Olympics | 1988—1992 | 0–0–1 1985 Sofia SWM bronze: 4×200 m freestyle relay | |
| Imre Nyéki | SWM | Olympics | 1948—1952 | 2–0–2 1947 Monte Carlo SWM bronze: 4×200 m freestyle relay; 1954 Torino SWM gold: 100 m freestyle and 4×200 m freestyle relay; 1958 Budapest SWM bronze: 4×200 m freestyle relay | |
| Stefan Nystrand | SWM | Olympics | 2000—2012 | 1–7–3 2000 Helsinki SWM silver: 4×100 m medley relay; 2002 Berlin SWM silver: 4×100 m freestyle relay; 2004 Madrid SWM silver: 50 m freestyle; 2006 Budapest SWM silver: 100 m freestyle; 2008 Eindhoven SWM gold: 4×100 m freestyle relay, silver: 100 m freestyle, bronze: 50 m freestyle and 4×100 m medley relay; 2010 Budapest SWM silver: 50 m freestyle, bronze: 4×100 m freestyle relay; 2012 Debrecen SWM silver: 50 m freestyle | |
| Siobhan-Marie O'Connor | SWM | Olympics | 2012—2016 | 2–1–1 2016 London SWM gold: 4×100 m medley relay and 4×100 m medley mixed relay, silver: 200 m medley; 2018 Glasgow SWM bronze: 4×100 m medley relay | |
| Gary O'Toole | SWM | Olympics | 1988—1992 | 0–1–0 1989 Bonn SWM silver: 200 m breaststroke | |
| Helge Öberg | DIV | Olympics | 1924—1928 | 0–1–0 1926 Budapest DIV silver: platform | |
| Tjaša Oder | SWM | Olympics | 2012—2016 | 0–0–1 2016 London SWM bronze: 800 m freestyle | |
| Alexander Dale Oen | SWM | Olympics | 2004—2008 | 2–4–0 2006 Budapest SWM silver: 100 m breaststroke; 2008 Eindhoven SWM gold: 100 m breaststroke, silver: 50 m breaststroke and 200 m breaststroke; 2010 Budapest SWM gold: 100 m breaststroke, silver: 200 m breaststroke | |
| Mattias Ohlin | SWM | Olympics | 2000—2004 | 0–2–1 1999 İstanbul SWM bronze: 4×100 m medley relay; 2000 Helsinki SWM silver: 4×100 m medley relay; 2002 Berlin SWM silver: 4×100 m freestyle relay | |
| Mariya Ohurtsova | SWM | Olympics | 2000 | 0–0–1 2002 Berlin SWM bronze: 4×100 m medley relay (swam in heats only) |