Host cities:
| Athlete | Nation(s) | Sport(s) | Role(s) | Era | Notes |
|---|---|---|---|---|---|
| Boštjan Maček | SHO | Olympics | 2012—2016 | 1–0–0 2009 Pescara SHO gold: trap | |
| Ismail Mačev | ATH | Olympics | 1988 | 0–2–0 1987 Latakia ATH silver: 400 m; 1991 Athina ATH silver: 4×400 m relay | |
| Carlos Machado | TTE | Olympics | 2012 | 0–1–2 2005 Almería TTN silver: doubles; 2009 Pescara TTN bronze: singles; 2013 Mersin TTN bronze: team | |
| Virginie Machado | GAR | Olympics | 1992 | 0–0–1 1991 Athina GYM bronze: team | |
| Tonia Machaira | SWM | Olympics | 1996—2000 | 0–1–2 1991 Athina SWI bronze: 200 m freestyle; 1993 Linguadoca-Roussillon SWI bronze: 4×100 m freestyle relay; 2001 Tunis SWI silver: 4×100 m freestyle relay | |
| Jorge Maciel | SAL | Olympics | 1996—2000 | 0–1–0 1997 Bari SAI silver: Mistral | |
| Michel Macquet | ATH | Olympics / Opening Flagbearer | 1956—1964 | 1–0–0 1955 Barcelona ATH gold: javelin throw | |
| Federica Macrì | GAR | Olympics | 2008 | 1–0–0 2005 Almería GYM gold: team | |
| Giuseppina Macrì | JUD | Olympics | 2004 | 0–1–1 1997 Bari JUD bronze: half-lightweight -52 kg; 2001 Tunis JUD silver: extra-lightweight -48 kg | |
| Stevo Macura | ROW | Olympics | 1972 | 0–1–0 1979 Split ROW silver: coxed fours | |
| Meta Mačus | ATH | Olympics | 2000 | 0–0–1 2001 Tunis ATH bronze: 400 m hudles | |
| Abdel Madjid Mada | ATH | Olympics | 1980 | 1–0–0 1979 Split ATH gold: 10000 m | |
| Hassan Madani | WRE | Olympics | 2008—2012 | 2–0–0 2005 Almería WRE gold: freestyle lightweight -60 kg; 2009 Pescara WRE gold: freestyle lightweight -60 kg | |
| Giuseppe Maddaloni | JUD | Olympics | 2000—2008 | 1–0–1 1997 Bari JUD bronze: lightweight -71 kg; 2005 Almería JUD gold: half-middleweight -81 kg | |
| Matthieu Madelaine | SWM | Olympics | 2008 | 0–0–1 2005 Almería SWI bronze: 4×200 m freestyle relay | |
| Ali Madi | HBL | Olympics | 2000 | 0–1–1 2001 Tunis HAN silver; 2005 Almería HAN bronze | |
| Noureddine Madjhoud | BOX | Olympics | 1996—2000 | 0–1–0 1997 Bari BOX silver: featherweight -57 kg | |
| Ezio Madonia | ATH | Olympics | 1988—1996 | 3–1–0 1987 Latakia ATH gold: 4×100 m relay, silver: 100 m; 1991 Athina ATH gold: 100 m and 4×100 m relay | |
| Fátima Madrid | SWM | Olympics | 1996 | 1–0–0 1997 Bari SWI gold: 4×100 m freestyle relay | |
| Vincenzo Maenza | WRE | Olympics | 1980—1992 | 2–1–1 1979 Split WRE silver: Greco-Roman light-flyweight -48 kg; 1983 Casablanca WRE gold: Greco-Roman light-flyweight -48 kg; 1987 Latakia WRE gold: Greco-Roman flyweight -52 kg; 1991 Athina WRE bronze: Greco-Roman flyweight -52 kg | |
| Giuseppe Maffei | ATH | Olympics | 2000—2004 | 0–0–1 1997 Bari ATH bronze: 3000 m steeplechase | |
| Ivano Maffei | CRD/CTR | Olympics | 1980 | 1–0–0 1979 Split CYC gold: road time trial team | |
| Michele Maffei | FEN | Olympics | 1968—1980 | 2–0–1 1967 Tunis FEN bronze: sabre; 1975 Al-Jaza'ir FEN gold: sabre; 1979 Split FEN gold: sabre | |
| Agnese Maffeis | ATH | Olympics | 1992—1996 | 4–2–0 1987 Latakia ATH gold: shot put; 1991 Athina ATH gold: discus throw, silver: shot put; 1993 Linguadoca-Roussillon ATH gold: shot put and discus throw; 2001 Tunis ATH silver: discus throw | |
| Ramón Magariños | ATH | Olympics | 1968 | 0–1–0 1967 Tunis ATH silver: 4×400 m relay | |
| Santos Magaz | CSP | Olympics | 1980 | 1–1–0 1979 Split CAN gold: C2 1000 m, silver: C2 500 m | |
| Panagiotis Magdanis | ROW | Olympics | 2012—2016 | 0–0–1 2013 Mersin ROW bronze: lightweight single sculls | |
| Marouen Maggaiz | HBL | Olympics | 2012—2016 | 0–0–1 2005 Almería HAN bronze | |
| Andrea Magi | BOX | Olympics | 1988 | 0–1–0 1987 Latakia BOX silver: light-heavyweight -81 kg | |
| Dimitrios Magklaras | ATH | Olympics | 1960—1964 | 0–1–0 1959 Beirut ATH silver: long jump | |
| Gianluca Maglia | SWM | Olympics | 2012 | 4–1–0 2009 Pescara SWI gold: 4×200 m freestyle relay, silver: 4×100 m freestyle relay; 2013 Mersin SWI gold: 4×100 m freestyle relay, 4×200 m freestyle relay, and 4×100 m medley relay | |
| Clothilde Magnan | FEN | Olympics | 1996 | 0–0–1 1993 Linguadoca-Roussillon FEN bronze: foil | |
| Jean-Claude Magnan | FEN | Olympics / Opening Flagbearer | 1960—1972 | 1–0–0 1963 Napoli FEN gold: foil | |
| Frédéric Magné | CTR | Olympics | 1988—2000 | 0–1–0 1991 Athina CYC silver: 1000 m time trail | |
| Walter Magnifico | BKB | Olympics | 1984 | 0–1–0 1983 Casablanca BAS silver | |
| Éric Magnin | CTR | Olympics | 1992 | 0–1–0 1991 Athina CYC silver: individual time trial | |
| Filippo Magnini | SWM | Olympics | 2004—2016 | 1–2–0 2005 Almería SWI silver: 100 m freestyle; 2009 Pescara SWI gold: 4×200 m freestyle relay, silver: 100 m freestyle | |
| Fabio Magrini | WLF | Olympics | 1988 | 0–0–1 1993 Linguadoca-Roussillon WLT bronze: middle-heavyweight -91 kg | |
| Atef Mahayri | WRE | Olympics | 1980 | 0–0–1 1975 Al-Jaza'ir WRE bronze: freestyle light-heavyweight -90 kg | |
| Mohamed Mahfoud | SHO | Olympics | 2000 | 0–0–1 1987 Latakia SHO bronze: 50 m small-bore rifle prone | |
| Kamal Mahgoub | WLF | Olympics | 1952 | 2–0–0 1951 Al-Iskanderiya WLT gold: bantamweight -56 kg; 1955 Barcelona WLT gold: bantamweight -56 kg | |
| Ahmed Mahir | BOX | Olympics | 1964 | 1–0–0 1963 Napoli BOX gold: middleweight -75 kg | |
| Joseph Mahmoud | ATH | Olympics | 1984—1992 | 1–0–0 1983 Casablanca ATH gold: 3000 m steeplechase | |
| Abdel Nabi Mahran | BOX | Olympics | 1976 | 0–0–1 1975 Al-Jaza'ir BOX bronze: bantamweight -54 kg | |
| Rolf Maier | WLF | Olympics | 1960—1968 | 1–1–0 1959 Beirut WLT silver: middleweight -75 kg; 1967 Tunis WLT gold: middleweight -75 kg | |
| Jacques Maillet | ROW | Olympics | 1948—1952 | 1–0–0 1955 Barcelona ROW gold: double sculls | |
| Igor Majcen | SWM | Olympics | 1988—1996 | 0–1–0 1993 Linguadoca-Roussillon SWI silver: 1500 m freestyle (competed for Slovenia) | |
| Nače Majčen | SWM | Olympics | 1992 | 0–0–3 1987 Latakia SWI bronze: 400 m freestyle and 4×100 m freestyle relay (competed for Yugoslavia); 1993 Linguadoca-Roussillon SWI bronze: 400 m freestyle | |
| Nemanja Majdov | JUD | Olympics / YOG | 2014—2024 | 0–1–0 2018 Tarragona JUD silver: middleweight -90 kg | |
| Mohamed Majeri | BOX | Olympics / Non-starter | 1972—1976 | 0–1–0 1971 İzmir BOX silver: light-middleweight -71 kg | |
| Montserrat Majo | SWM | Olympics | 1976 | 0–0–2 1975 Al-Jaza'ir SWI bronze: 100 m butterfly and 4×100 m freestyle relay | |
| Karmele Makazaga | HBL | Olympics | 1992 | 0–0–2 1987 Latakia HAN bronze; 1991 Athina HAN bronze | |
| Ivana Maksimović-Anđušić | SHO | Olympics / Opening Flagbearer | 2012—2016 | 1–1–0 2013 Mersin SHO gold: 50 m small-bore rifle 3 positions, silver: 10 m air rifle (competed as Ivana Maksimović) | |
| Aleksandar Maksimović | WRE | Olympics | 2012 | 0–2–0 2009 Pescara WRE silver: Greco-Roman welterweight -66 kg; 2013 Mersin WRE silver: Greco-Roman welterweight -66 kg | |
| Goran Maksimović | SHO | Olympics | 1984—2000 | 0–1–0 1991 Athina SHO silver: 10 m air rifle (competed for Yugoslavia) | |
| Hedaya Malak | TKW | Olympics / Opening Flagbearer / Closing Flagbearer | 2012—2020 | 0–0–2 2013 Mersin TKW bronze: welterweight -67 kg; 2018 Tarragona TKW bronze: welterweight -67 kg | |
| Ilias Malamas | SWM | Olympics | 1984—1988 | 0–0–1 1983 Casablanca SWI bronze: 200 m backstroke | |
| Aurélie Malaussena | GAR | Olympics | 2012 | 1–0–0 2009 Pescara GYM gold: team | |
| Mladenka Maleniča | SHO | Olympics | 1988—2000 | 0–0–2 1997 Bari SHO bronze: 50 m small-bore rifle 3 positions and 10 m air rifle (competed for Croatia) | |
| Tamara Malešev | ATH | Olympics | 1992 | 1–0–0 1991 Athina ATH gold: long jump (competed for Yugoslavia) | |
| Radovan Malević | VVO | Olympics | 1980 | 1–0–0 1979 Split VOL gold | |
| Santiago Malgosa | HOC | Olympics | 1980—1984 | 0–1–0 1979 Split HOK silver | |
| Stefano Malinverni | ATH | Olympics | 1980 | 0–0–1 1979 Split ATH bronze: 4×400 m relay | |
| Mohamed El-Malky | WRE | Olympics | 1972 | 0–1–0 1975 Al-Jaza'ir WRE silver: Greco-Roman light-flyweight -48 kg | |
| Blai Mallarach | WPO | Olympics | 2012—2020 | 0–2–0 2009 Pescara WAP silver; 2013 Mersin WAP silver | |
| Mouldi Manai | BOX | Olympics | 1968 | 0–1–0 1971 İzmir BOX silver: featherweight -57 kg | |
| Laure Manaudou | SWM | Olympics / Torch Bearer | 2004—2024 | 2–0–0 2005 Almería SWI gold: 400 m freestyle and 50 m backstroke | |
| Eleuterio Mancebo | CRD | Olympics | 1992 | 1–1–0 1991 Athina CYC gold: individual pursuit; 1993 Linguadoca-Roussillon CYC silver: road time trial team | |
| Beatriz Manchón | CSP | Olympics | 1996—2008 | 0–0–1 1997 Bari CAN bronze: K2 500 m | |
| Blanca Manchón | SAL | Olympics | 2004—2020 | 1–0–0 2018 Tarragona SAI gold: RS:X | |
| Évelyne Manchon | SHO | Olympics | 1984—1992 | 1–1–1 1991 Athina SHO silver: 25 m sporting pistol; 1993 Linguadoca-Roussillon SHO gold: 10 m air pistol, bronze: 25 m sporting pistol | |
| Claudia Mandia | ARC | Olympics | 2016 | 1–0–0 2013 Mersin ARC gold: team | |
| Dušan Mandić | WPO | Olympics / Opening Flagbearer | 2012—2024 | 1–0–0 2018 Tarragona WAP gold | |
| Marko Mandič | ROW | Olympics | 1964—1972 | 0–1–0 1963 Napoli ROW silver: eights | |
| Milica Mandić | TKW | Olympics / Closing Flagbearer | 2012—2020 | 0–1–0 2013 Mersin TKW silver: heavyweight +67 kg | |
| Sandra Mandir | BKB | Olympics | 2012 | 1–1–0 2001 Tunis BAS gold (competed as Sandra Popović); 2005 Almería BAS silver (competed as Sandra Popović) | |
| Davide Manenti | ATH | Olympics / Non-starter | 2012—2020 | 2–0–0 2013 Mersin ATH gold: 4×100 m relay; 2018 Tarragona ATH gold: 4×100 m relay | |
| Laurence Manfrédi | ATH | Olympics | 2000—2004 | 0–1–0 2005 Almería ATH silver: shot put | |
| Véronique Mang | ATH | Olympics | 2004—2012 | 2–0–0 2005 Almería ATH gold: 100 m and 4×100 m relay | |
| Dimitrios Manganas | SWM | Olympics | 1996—2004 | 1–3–1 1997 Bari SWI silver: 200 m freestyle and 4×200 m freestyle relay, bronze: 400 m freestyle; 2001 Tunis SWI gold: 4×200 m freestyle relay; 2005 Almería SWI silver: 4×200 m freestyle relay | |
| Andrea Mangiante | WPO | Olympics | 2008 | 0–2–1 2001 Tunis WAP silver; 2005 Almería WAP silver; 2009 Pescara WAP bronze | |
| Carola Mangiarotti | FEN | Olympics | 1976—1980 | 0–0–1 1975 Al-Jaza'ir FEN bronze: foil | |
| Dario Mangiarotti | FEN | Olympics | 1948—1952 | 1–0–0 1951 Al-Iskanderiya FEN gold: épée team | |
| Edoardo Mangiarotti | FEN | Olympics / Referee / Opening Flagbearer / Closing Flagbearer | 1936—1972 | 2–3–1 1951 Al-Iskanderiya FEN gold: foil team and épée team, bronze: foil; 1955 Barcelona FEN silver: foil, foil team, and épée team | |
| Marta Mangué | HBL | Olympics | 2004—2016 | 1–0–0 2005 Almería HAN gold | |
| Panagiotis Manias | BKB | Olympics | 1952 | 0–0–1 1955 Barcelona BAS bronze | |
| Peter Mankoč | SWM | Olympics | 1996—2012 | 3–1–1 2001 Tunis SWI gold: 200 m medley, silver: 100 m freestyle; 2005 Almería SWI gold: 100 m butterfly and 4×100 m medley relay; 2009 Pescara SWI bronze: 100 m butterfly | |
| Luigi Mannelli | WPO | Olympics | 1956—1960 | 0–1–0 1959 Beirut WAP silver | |
| Maurizio Mannelli | WPO | Olympics | 1952 | 1–0–0 1955 Barcelona WAP gold | |
| Angelo Mannironi | WLF | Olympics | 1988 | 1–0–1 1983 Casablanca WLT bronze: lightweight -67.5 kg; 1987 Latakia WLT gold: middleweight -75 kg | |
| Sebastiano Mannironi | WLF | Olympics | 1956—1964 | 2–0–0 1955 Barcelona WLT gold: featherweight -60 kg; 1967 Tunis WLT gold: featherweight -60 kg | |
| Sergio Mannironi | WLF | Olympics | 2000 | 0–1–1 1997 Bari WLT light-heavyweight -83 kg silver: snatch, bronze: clean & jerk | |
| Predrag Manojlović | WPO | Olympics | 1976—1980 | 1–1–0 1975 Al-Jaza'ir WAP silver; 1979 Split WAP gold | |
| Diran Manoukian | HOC | Olympics | 1948—1960 | 0–0–1 1955 Barcelona HOK bronze | |
| Ana Manso | GAR | Olympics | 1984 | 2–0–0 1983 Casablanca GYM gold: horse vault and team | |
| Esmat Mansur | WLF | Olympics | 2012 | 5–1–0 2005 Almería WLT lightweight -58 kg gold: clean & jerk, silver: snatch; 2009 Pescara WLT middleweight -63 kg gold: snatch and clean & jerk; 2013 Mersin WLT light-heavyweight -69 kg gold: snatch and clean & jerk | |
| Gianfranco Mantelli | SHO | Olympics | 1976—1980 | 1–0–0 1975 Al-Jaza'ir SHO gold: 25 m rapid-fire pistol | |
| Lampis Manthos | SHO | Olympics | 1964—1976 | 0–1–0 1971 İzmir SHO silver: 50 m small-bore rifle prone | |
| Panagiotis Mantis | SAL | Olympics | 2016—2020 | 0–1–0 2013 Mersin SAI silver: 470 | |
| Efi Mantzaraki | SAL | Olympics | 2004—2008 | 0–0–1 2005 Almería SAI bronze: Laser | |
| Roxana Maracineanu | SWM | Olympics | 2000 | 1–2–2 1997 Bari SWI gold: 100 m backstroke, silver: 200 m backstroke, bronze: 4×100 m medley relay; 2001 Tunis SWI silver: 200 m backstroke, bronze: 4×100 m medley relay | |
| José Marajo | ATH | Olympics | 1976—1980 | 1–0–0 1979 Split ATH gold: 1500 m | |
| Vlasis Maras | GAR | Olympics | 2004—2016 | 1–0–0 2001 Tunis GYM gold: horizontal bar | |
| Vittorio Marcelli | CRD | Olympics | 1968 | 1–0–0 1967 Tunis CYC gold: road time trial team | |
| Christophe Marchand | SWM | Olympics | 1988—1992 | 3–1–0 1991 Athina SWI gold: 400 m freestyle, silver: 4×200 m freestyle relay; 1993 Linguadoca-Roussillon SWI gold: 400 m freestyle and 4×200 m freestyle relay | |
| Xavier Marchand | SWM | Olympics | 1996—2000 | 1–1–1 1993 Linguadoca-Roussillon SWI silver: 200 m medley, bronze: 400 m medley; 1997 Bari SWI gold: 200 m medley | |
| Umberto Marcheggiani | WRE | Olympics | 1968—1972 | 0–1–0 1967 Tunis WRE silver: freestyle middleweight -87 kg | |
| Marco Marchei | ATH | Olympics | 1980—1984 | 0–1–0 1979 Split ATH silver: marathon | |
| Gabriella Marchi | GAR | Olympics | 1972 | 1–0–1 1971 İzmir GYM gold: team, bronze: all-around | |
| Tullio Marchiori | HOC | Olympics | 1960 | 0–0–1 1963 Napoli HOK bronze | |
| Angelo Marciani | WPO | Olympics | 1956 | 1–0–0 1955 Barcelona WAP gold | |
| José María de Marco | ROW | Olympics | 1992—1996 | 0–1–0 1991 Athina ROW silver: coxless fours | |
| Eloisa Marcos | GAR | Olympics | 1976 | 0–2–0 1975 Al-Jaza'ir GYM silver: team; 1979 Split GYM silver: team | |
| Gustavo Marcos | WPO | Olympics | 2000—2004 | 0–0–1 1997 Bari WAP bronze | |
| María José Mardomingo | ATH | Olympics | 1992—1996 | 0–0–1 1991 Athina ATH bronze: 100 m hurdles | |
| Igor Marenić | SAL | Olympics | 2008—2016 | 1–1–0 2009 Pescara SAI silver: 470; 2013 Mersin SAI gold: 470 | |
| Cyrille Maret | JUD | Olympics | 2016 | 0–1–0 2009 Pescara JUD silver: half-heavyweight -100 kg | |
| Chedli El-Marghni | ATH | Olympics | 1964 | 0–1–0 1967 Tunis ATH silver: 20 km walk | |
| Mitja Margon | SAL | Olympics | 1996—2000 | 1–0–0 1997 Bari SAI gold: 470 | |
| Lamberto Mari | DIV | Olympics | 1952—1960 | 1–1–0 1959 Beirut DIV gold: platform, silver: springboard | |
| Ivette María | SWM | Olympics | 1996—2000 | 0–2–0 1997 Bari SWI silver: 100 m backstroke and 4×100 m medley relay | |
| Fernando Mariaca | WLF | Olympics | 1984—1992 | 0–2–0 1983 Casablanca WLT silver: lightweight -67.5 kg; 1987 Latakia WLT silver: lightweight -67.5 kg | |
| Felice Mariani | JUD | Olympics | 1976—1984 | 2–1–0 1975 Al-Jaza'ir JUD silver: lightweight -63 kg; 1979 Split JUD gold: extra-lightweight -60 kg; 1983 Casablanca JUD gold: extra-lightweight -60 kg | |
| Martin Marić | ATH | Olympics | 2008—2012 | 1–0–0 2013 Mersin ATH gold: discus throw | |
| Bruno Marie-Rose | ATH | Olympics | 1984—1992 | 1–0–0 1993 Linguadoca-Roussillon ATH gold: 4×100 m relay | |
| Tomislav Marijanović | JUD | Olympics | 2012 | 0–0–1 2013 Mersin JUD bronze: half-middleweight -81 kg | |
| Alicia Marín | ARC | YOG | 2014 | 0–1–0 2018 Tarragona ARC silver: Recurve team | |
| José Marín | ATH | Olympics | 1980—1992 | 0–1–1 1975 Al-Jaza'ir ATH bronze: 20 km walk; 1979 Split ATH silver: 20 km walk | |
| Luca Marin | SWM | Olympics | 2004—2016 | 0–1–0 2009 Pescara SWI silver: 400 m medley | |
| Montserrat Marín | HBL | Olympics | 1992 | 0–0–2 1991 Athina HAN bronze; 1993 Linguadoca-Roussillon HAN bronze | |
| Miguel Marina | SHO | Olympics | 1968—1972 | 0–1–0 1971 İzmir SHO silver: skeet | |
| Boško Marinko | WRE | Olympics | 1968—1972 | 1–1–0 1967 Tunis WRE silver: freestyle featherweight -63 kg; 1971 İzmir WRE gold: Greco-Roman flyweight -52 kg | |
| Massimo Marino | CTR | Olympics | 1972—1976 | 0–1–0 1971 İzmir CYC silver: sprint | |
| Luciano Marion | ROW | Olympics | 1952 | 2–0–0 1951 Al-Iskanderiya ROW gold: coxed pairs; 1955 Barcelona ROW gold: coxed fours | |
| Dragan Marjanac | HBL | Olympics | 2012 | 1–0–0 2009 Pescara HAN gold | |
| Marko Marjanović | ROW | Olympics | 2016 | 0–2–0 2013 Mersin ROW silver: double sculls; 2018 Tarragona ROW silver: single sculls | |
| Kamal Marjouane | BOX | Olympics | 1988—1992 | 2–0–0 1991 Athina BOX gold: lightweight -60 kg; 1993 Linguadoca-Roussillon BOX gold: lightweight -60 kg | |
| Matjaž Markič | SWM | Olympics | 2008 | 0–0–1 2005 Almería SWI bronze: 50 m breaststroke | |
| Anninos Markoullidis | ATH | Olympics / Opening Flagbearer | 1996—2004 | 1–1–2 1997 Bari ATH silver: 100 m, bronze: 4×100 m relay; 2001 Tunis ATH gold: 200 m, bronze: 100 m | |
| Dobrivoje Marković | HBL | Olympics | 2012 | 1–0–0 2009 Pescara HAN gold | |
| Leposava Marković | JUD | Olympics | 1992 | 0–1–0 1997 Bari JUD silver: extra-lightweight -48 kg (competed for FR Yugoslavia) | |
| Ljiljana Marković | HBL | Olympics | 1988 | 1–0–0 1991 Athina HAN gold | |
| Vladan Marković | SWM | Olympics | 1996—2008 | 0–0–3 1997 Bari SWI bronze: 100 m butterfly and 200 m butterfly (competed for FR Yugoslavia); 2001 Tunis SWI bronze: 100 m butterfly (competed for FR Yugoslavia) | |
| Georgios Marmaridis | SHO | Olympics | 1960 | 0–0–1 1959 Beirut SHO bronze: 25 m rapid-fire pistol | |
| Antonio Marmorino | CSP | Olympics | 1996 | 0–1–0 1997 Bari CAN silver: C2 500 m | |
| Mohamed Salah Marmouri | BOX | Olympics | 1996—2000 | 1–0–1 1997 Bari BOX gold: light-middleweight -71 kg; 2001 Tunis BOX bronze: light-middleweight -71 kg | |
| Zoran Maroević | BKB | Olympics | 1968 | 1–0–0 1967 Tunis BAS gold | |
| Miguel Ángel Maroto | VVO | Olympics | 1992 | 0–0–1 1991 Athina VOL bronze | |
| Raúl Maroto | FEN | Olympics | 1988—1996 | 0–1–0 1993 Linguadoca-Roussillon FEN silver: épée | |
| Milun Marović | BKB | Olympics | 1972 | 1–0–0 1971 İzmir BAS gold | |
| Uroš Marović | WPO | Olympics | 1968—1976 | 2–1–0 1967 Tunis WAP gold; 1971 İzmir WAP gold; 1975 Al-Jaza'ir WAP silver | |
| Luc Marquet | VVO | Olympics | 1992 | 2–0–0 1993 Languedoc-Roussillon VOL gold; 1997 Bari VOL gold | |
| Christian Marquis | ROW | Olympics | 1980 | 1–0–0 1979 Split ROW gold: quadruple sculls | |
| Georgios Marsellos | ATH | Olympics / Torch Bearer / Opening Flagbearer | 1960—1964 | 1–1–0 1959 Beirut ATH gold: 110 m hurdles, silver: decathlon | |
| Sante Marsili | WPO | Olympics | 1972—1980 | 1–0–0 1975 Al-Jaza'ir WAP gold | |
| Carlos Martí | WPO | Olympics | 1948 | 1–0–0 1951 Al-Iskanderiya WAP gold | |
| Jorge Martí | SAL | Olympics | 1960 | 0–1–0 1955 Barcelona SAI silver: Flying Dutchman | |
| Pavao Martić | ROW | Olympics | 1964 | 0–1–0 1963 Napoli ROW silver: eights | |
| Jean-Jacques Martigne | ROW | Olympics | 1984—1988 | 0–1–0 1991 Athina ROW silver: quadruple sculls | |
| Jean-Paul Martin du Gard | ATH | Olympics | 1952—1956 | 2–0–0 1951 Al-Iskanderiya ATH gold: 4×400 m relay; 1955 Barcelona ATH gold: 4×400 m relay | |
| Blanca Martín-Calero | HBL | Olympics | 1992 | 0–0–1 1993 Linguadoca-Roussillon HAN bronze | |
| Beatriz Martín | JUD | Olympics | 2000 | 0–0–1 1997 Bari JUD bronze: half-heavyweight -72 kg | |
| Carmen Martín | HBL | Olympics | 2012—2020 | 1–0–0 2005 Almería HAN gold | |
| Claude Martin | ROW | Olympics | 1952—1960 | 1–0–0 1955 Barcelona ROW gold: coxed pairs | |
| David Martín | WPO | Olympics / Coach | 2008—2024 | 2–1–0 2001 Tunis WAP gold; 2005 Almería WAP gold; 2009 Pescara WAP silver | |
| Isidro Martín | ROW | Olympics | 1980—1984 | 1–0–0 1979 Split ROW gold: eights | |
| Mónica Martín | GAR | Olympics | 1996 | 1–0–0 1993 Linguadoca-Roussillon GYM gold: team | |
| Isidoro Martínez-Vela | SWM | Olympics | 1948 | 0–1–0 1951 Al-Iskanderiya SWI silver: 4×200 m freestyle relay | |
| Alfonso Martínez | BKB | Olympics | 1960—1968 | 0–2–0 1959 Beirut BAS silver; 1963 Napoli BAS silver | |
| Conchita Martínez | TEN | Olympics | 1992—2004 | 1–0–0 1987 Latakia TEN gold: singles | |
| David Martínez | ATH | Olympics | 1992—2000 | 0–1–1 1991 Athina ATH bronze: discus throw; 2001 Tunis ATH silver: discus throw | |
| Ferrán Martínez | BKB | Olympics | 1988 | 0–1–0 1987 Latakia BAS silver | |
| Irene Martínez | GAR | Olympics | 1980—1984 | 2–3–2 1979 Split GYM silver: floor and team, bronze: all-around; 1983 Casablanca GYM gold: uneven bars and team, silver: floor, bronze: all-around | |
| Javier Martínez | ATH | Olympics | 1976 | 0–0–1 1975 Al-Jaza'ir ATH bronze: 4×100 m relay | |
| Javier Martínez | BOX | Olympics | 1988 | 0–0–1 1991 Athina BOX bronze: welterweight -67 kg | |
| José Luis Martínez | WLF | Olympics | 1988—1992 | 0–0–2 1987 Latakia WLT bronze: flyweight -52 kg; 1991 Athina WLT bronze: bantamweight -56 kg | |
| José Manuel Martínez | ATH | Olympics | 2004—2008 | 0–1–1 2005 Almería ATH bronze: half-marathon; 2009 Pescara ATH silver: half-marathon | |
| Juan Martínez | SWM | Olympics | 1968 | 1–0–1 1963 Napoli SWI bronze: 4×200 m freestyle relay; 1967 Tunis SWI gold: 4×100 m freestyle relay | |
| Juan Antonio Martínez | BKB | Olympics | 1968 | 0–1–0 1963 Napoli BAS silver | |
| Luis Martínez | SHO | Olympics | 2008 | 0–0–1 2001 Tunis SHO bronze: 10 m air rifle | |
| Manuel Martínez | ATH | Olympics | 1996—2008 | 2–1–0 2001 Tunis ATH gold: shot put; 2005 Almería ATH silver: shot put; 2009 Pescara ATH gold: shot put | |
| Manuel Martínez | FEN | Olympics | 1960 | 0–0–1 1959 Beirut FEN bronze: épée team | |
| María Martínez | TEN | Olympics | 2008—2012 | 0–1–0 2001 Tunis TEN silver: doubles | |
| Mayté Martínez | ATH | Olympics | 2000—2004 | 1–0–0 2005 Almería ATH gold: 4×400 m relay | |
| Rafael Martínez | GAR | Olympics | 2004—2008 | 4–0–3 2005 Almería GYM gold: all-around, floor, horizontal bar, and team, bronze: parallel bars; 2009 Pescara GYM bronze: parallel bars and team | |
| Ramón Martínez | FEN | Olympics | 1960 | 0–1–0 1959 Beirut FEN silver: sabre team | |
| Santiago Martínez | WLF | Olympics | 2004 | 1–0–2 2001 Tunis WLT middle-heavyweight -94 kg bronze: snatch and clean & jerk; 2005 Almería WLT middle-heavyweight -94 kg gold: snatch | |
| Silvia Martínez | GAR | Olympics | 1992 | 1–1–1 1991 Athina GYM gold: team, silver: all-around, bronze: horse vault | |
| Bruno Martini | HBL | Olympics | 1996—2000 | 0–1–0 1993 Linguadoca-Roussillon HAN silver | |
| Flavio Martini | CRD | Olympics | 1968 | 1–0–0 1967 Tunis CYC gold: road time trial team | |
| Marco Martino | ATH | Olympics | 1984 | 1–1–1 1983 Casablanca ATH bronze: discus throw; 1987 Latakia ATH gold: discus throw; 1991 Athina ATH silver: discus throw | |
| Stefano Martinoli | ROW | Olympics | 1956 | 0–1–0 1963 Napoli ROW silver: double sculls | |
| Oliver Martinov | ROW | Olympics | 2000 | 1–0–0 1997 Bari ROW gold: coxless fours | |
| Marija Martinović-Šestak | ATH | Olympics | 2000—2012 | 0–1–0 2001 Tunis ATH silver: triple jump (competed as Marija Martinović for FR Yugoslavia) | |
| Branko Martinović | WRE | Olympics / Non-starter | 1960—1968 | 1–0–0 1963 Napoli WRE gold: Greco-Roman lightweight -70 kg | |
| Tony Martins-Bordelo | ATH | Olympics | 1992 | 0–0–1 1991 Athina ATH bronze: 5000 m | |
| Miguel Martorell | CTR | Olympics | 1960 | 2–0–1 1959 Beirut CYC gold: road race team and team pursuit, bronze: road race | |
| Juan Martos | BKB | Olympics | 1960 | 0–1–0 1959 Beirut BAS silver | |
| Lorenzo Marugo | SWM | Olympics | 1972 | 3–1–0 1971 İzmir SWI gold: 400 m medley; 1975 Al-Jaza'ir SWI gold: 400 m medley and 4×200 m freestyle relay, silver: 200 m medley | |
| Sead Marušić | ROW | Olympics | 1988—1996 | 0–0–1 1993 Linguadoca-Roussillon ROW bronze: coxless fours (competed for Croatia) |