Host cities:
| Athlete | Nation(s) | Sport(s) | Role(s) | Era | Notes | 
|---|---|---|---|---|---|
| Nina Morgunova |  URS  UKR | ATH | Olympics | 1972 | 1–0–0 1975 Roma ATH gold: 800 m | 
| Takahiro Mori |  JPN | SWM | Olympics | 2004 | 3–0–2 1999 Palma de Mallorca SWI bronze: 200 m medley and 400 m medley; 2001 Beijing SWI gold: 200 m medley; 2003 Daegu SWI gold: 200 m medley and 400 m medley | 
| Lucia Morico |  ITA | JUD | Olympics | 2004—2008 | 0–0–1 1999 Palma de Mallorca JUD bronze: open class | 
| Mamoru Morimoto |  JPN | ATH | Olympics | 1964 | 1–1–0 1963 Porto Alegre ATH gold: 800 m, silver: 1500 m | 
| Maiko Morio |  JPN | GAR | Olympics | 1984—1988 | 0–0–1 1985 Kobe GYM bronze: floor | 
| Koichiro Morioka |  JPN | ATH | Olympics | 2008—2016 | 0–0–2 2005 İzmir ATH bronze: 20 km walk; 2007 Bangkok ATH bronze: 20 km walk | 
| Jungo Morita |  JPN | VVO | Olympics | 1968—1972 | 1–0–0 1967 Tokyo VOL gold | 
| Carlo Mornati |  ITA | ROW | Olympics | 1996—2008 | 0–1–1 1993 Buffalo ROW silver: lightweight coxless pairs, bronze: coxless pairs | 
| Dmitry Morozov |  RUS | JUD | Olympics | 2000 | 0–2–1 1995 Fukuoka JUD silver: team, bronze: middleweight -86 kg; 2001 Beijing JUD silver: middleweight -90 kg | 
| Vladimir Morozov |  ROC  RUS | SWM | Olympics | 2012—2020 | 4–1–1 2013 Kazan SWI gold: 50 m freestyle, 100 m freestyle, 4×100 m freestyle relay, and 4×100 m medley relay, silver: 50 m backstroke, bronze: 50 m breaststroke | 
| Devon Morris |  JAM | ATH | Olympics | 1984—1992 | 1–0–0 1989 Duisburg ATH gold: 4×400 m relay | 
| Jay Mortenson |  USA | SWM | Olympics | 1988 | 1–0–1 1987 Zagreb SWI gold: 4×100 m medley relay, bronze: 100 m backstroke | 
| Leonid Moseyev |  RUS  URS | ATH | Olympics | 1976—1980 | 1–0–1 1977 Sofia ATH gold: 10000 m, bronze: 5000 m | 
| Kseniya Moskvina |  RUS | SWM | Olympics | 2008 | 0–0–1 2009 Beograd SWI bronze: 4×100 m medley relay | 
| Justyna Mospinek |  POL | ARC | Olympics | 2004—2008 | 0–0–2 2005 İzmir ARC bronze: recurve team; 2009 Beograd ARC bronze: recurve mixed team | 
| Anthony Mosse |  NZL | SWM | Olympics | 1984—1988 | 1–2–1 1983 Edmonton SWI bronze: 200 m butterfly; 1985 Kobe SWI silver: 200 m butterfly; 1987 Zagreb SWI gold: 200 m butterfly, silver: 100 m butterfly | 
| Nico Motchebon |  GER | ATH | Olympics | 1996 | 0–0–1 1993 Buffalo ATH bronze: 800 m | 
| Lucimar Moura |  BRA | ATH | Olympics | 2004—2008 | 0–1–0 2001 Beijing ATH silver: 4×100 m relay | 
| Michail Mouroutsos |  GRE | TKW | Olympics | 2000—2004 | 0–0–1 2005 İzmir TKW bronze: featherweight -67 kg | 
| Meriem Moussa |  ALG | JUD | Olympics | 2008 | 0–0–2 2007 Bangkok JUD bronze: extra-lightweight -48 kg; 2011 Shenzhen JUD bronze: half-lightweight -52 kg | 
| Franck Martial Moussima |  CMR | JUD | Olympics / Other | 2004—2008 | 0–1–0 2007 Bangkok JUD silver: half-heavyweight -100 kg | 
| Nawal El-Moutawakel |  MAR | ATH | Olympics / Administrator | 1984—2019 | 1–0–1 1985 Kobe ATH bronze: 400 m hurdles; 1987 Zagreb ATH gold: 400 m hurdles | 
| Sotirios Moutsanas |  GRE | ATH | Olympics | 1984 | 0–1–0 1981 București ATH silver: 800 m | 
| Roberto Moya |  CUB | ATH | Olympics | 1992—1996 | 0–0–1 1989 Duisburg ATH bronze: discus throw | 
| Kira Mozgalova |  RUS | SHO | Olympics | 2012 | 0–1–1 2007 Bangkok SHO silver: 25 m sporting pistol team, bronze: 10 m air pistol | 
| Aleksandr Mozhayev |  RUS  URS | FEN | Olympics | 1980 | 2–1–0 1979 Ciudad de México FEN silver: épée team; 1985 Kobe FEN gold: épée and épée team | 
| Thuso Mpuang |  RSA | ATH | Olympics | 2008 | 1–1–2 2009 Beograd ATH bronze: 200 m and 4×100 m relay; 2011 Shenzhen ATH gold: 4×100 m relay, silver: 200 m | 
| Anna Mroszczak |  POL | FEN | YOG | 2014 | 0–0–1 2019 Napoli FEN bronze: épée team | 
| Magdalena Mróz |  POL | TEN | Olympics | 1992 | 0–1–0 1997 Catania silver: doubles (competed as Magdalena Feistel) | 
| Mirosław Mruk |  POL | ROW | Olympics | 1988 | 1–0–0 1987 Zagreb ROW gold: quadruple sculls | 
| Giorgi Mshvenieradze |  GEO  URS | WPO | Olympics | 1980—1988 | 1–0–0 1985 Kobe WAP gold | 
| Nuzgari Mshvenieradze |  GEO  URS | WPO | Olympics | 1976 | 1–0–0 1973 Moskva WAP gold | 
| Carline Muir |  CAN | ATH | Olympics | 2008—2016 | 1–0–1 2009 Beograd ATH gold: 4×400 m relay, bronze: 400 m | 
| Marianne Muis |  NED | SWM | Olympics | 1988—1996 | 1–2–2 1987 Zagreb SWI gold: 4×100 m freestyle relay, silver: 4×200 m freestyle relay, bronze: 200 m medley; 1995 Fukuoka SWI silver: 100 m freestyle, bronze: 50 m freestyle | 
| Mildred Muis |  NED | SWM | Olympics | 1988—1992 | 1–2–2 1987 Zagreb SWI gold: 4×100 m freestyle relay, silver: 200 m medley and 4×200 m freestyle relay, bronze: 100 m freestyle and 4×100 m medley relay | 
| Razija Mujanović |  BIH  YUG | BKB | Olympics | 1988 | 1–0–1 1985 Kobe BAS bronze; 1987 Zagreb BAS gold | 
| Carolina Mujica |  ESP | BKB | Olympics | 1992 | 0–1–0 1991 Sheffield BAS silver | 
| Sadik Mujkič |  SLO  YUG | ROW | Olympics | 1988—1996 | 0–0–1 1987 Zagreb ROW bronze: eights (competed for Yugoslavia) | 
| Margarita Mukashova |  KAZ | ATH | Olympics | 2012—2016 | 1–0–0 2013 Kazan ATH gold: 800 m | 
| Yury Mukhin |  RUS  EUN | SWM | Olympics | 1992 | 0–0–1 1995 Fukuoka SWI bronze: 4×100 m medley relay (competed for Russia) | 
| Olha Mukomol |  UKR | SWM | Olympics | 2000—2004 | 1–1–0 2001 Beijing SWI silver: 50 m freestyle; 2003 Daegu SWI gold: 50 m freestyle | 
| Nedžad Mulabegović |  CRO | ATH | Olympics | 2004—2012 | 0–0–1 2003 Daegu ATH bronze: shot put | 
| Katalin Müller-Száll |  HUN | GAR | Olympics | 1960—1968 | 1–0–0 1963 Porto Alegre GYM gold: team (competed as Katalin Müller) | 
| Helmar Müller |  FRG | ATH | Olympics | 1968 | 1–1–0 1967 Tokyo ATH gold: 4×400 m relay, silver: 400 m | 
| Mun Yu-Ra |  KOR | WLF | Olympics | 2012 | 0–1–0 2011 Shenzhen WLT silver: light-heavyweight -69 kg | 
| Marina Munćan |  SRB | ATH | Olympics | 2012 | 1–0–0 2009 Beograd ATH gold: 1500 m | 
| Markus Münch |  GER | ATH | Olympics | 2012 | 0–0–1 2009 Beograd ATH bronze: discus throw | 
| Thomas Munkelt |  GDR | ATH | Olympics | 1976—1980 | 0–1–1 1973 Moskva ATH bronze: 110 m hurdles; 1979 Ciudad de México ATH silver: 110 m hurdles | 
| Felipe Muñoz |  MEX | SWM | Olympics / Other / Administrator | 1968—2012 | 0–0–1 1973 Moskva SWI bronze: 200 m breaststroke | 
| Andrei Muntean |  ROU | GAR | Olympics / YOG | 2010—2016 | 0–0–1 2017 Taipei GYM bronze: vault | 
| János Murányi |  HUN | ATH | Olympics | 1972 | 1–0–0 1970 Torino ATH gold: discus throw | 
| Vladimir Muravyov |  KAZ  URS | ATH | Olympics | 1980—1988 | 0–1–1 1981 București ATH silver: 4×100 m relay; 1983 Edmonton ATH bronze: 4×100 m relay | 
| Emil Mureșan |  ROU | WPO | Olympics / Non-starter | 1960—1964 | 0–0–1 1965 Budapest WAP bronze | 
| Tănase Mureșanu |  ROU | FEN | Olympics / Referee | 1960—1984 | 0–1–0 1965 Budapest FEN silver: foil team | 
| Andi Murez |  ISR | SWM | Olympics | 2016—2020 | 1–1–1 2013 Kazan SWI gold: 4×200 m freestyle relay, silver: 4×100 m freestyle relay, bronze: 4×100 m medley relay (swam in heats only) (competed for the United States) | 
| Yojiro Muro |  JPN | ATH | Olympics | 1964 | 0–1–0 1961 Sofia ATH silver: 4×100 m relay | 
| Shigenobu Murofushi |  JPN | ATH | Olympics / Other | 1972—1984 | 0–0–1 1967 Tokyo ATH bronze: hammer throw | 
| Sei Muroya |  JPN | FBL | Olympics | 2016 | 0–0–1 2015 Gwangju FTB bronze | 
| Patrick Murphy |  AUS | SWM | Olympics | 2004—2008 | 0–1–0 2003 Daegu SWI silver: 4×100 m freestyle relay | 
| Sean Murphy |  CAN | SWM | Olympics | 1988 | 0–1–0 1985 Kobe SWI silver: 200 m backstroke | 
| Fergus Murray |  GBR | ATH | Olympics | 1964 | 0–0–1 1965 Budapest ATH bronze: 5000 m | 
| Milan Muškatirović |  SRB  YUG | WPO | Olympics | 1960—1964 | 1–0–0 1959 Torino WAP gold | 
| Kemal Muslubaş |  TUR | SAL | Olympics | 2004—2008 | 0–1–0 2005 İzmir SAI silver: Laser men | 
| Aliya Mustafina |  RUS | GAR | Olympics | 2012—2016 | 3–1–0 2013 Kazan GYM gold: all-around, uneven bars, and team, silver: balance beam | 
| Marin Mustață |  ROU | FEN | Olympics | 1976—1984 | 1–0–2 1977 Sofia FEN gold: sabre team; 1979 Ciudad de México FEN bronze: sabre; 1981 București FEN bronze: sabre team | 
| Emir Mutapčić |  BIH  YUG | BKB | Olympics | 1984 | 1–1–0 1983 Edmonton BAS silver; 1987 Zagreb BAS gold | 
| Līna Mūze |  LAT | ATH | Olympics | 2012—2020 | 0–1–0 2015 Gwangju ATH silver: javelin throw | 
| Alwyn Myburgh |  RSA | ATH | Olympics | 2000—2008 | 1–0–0 2001 Beijing ATH gold: 400 m hurdles | 
| Volodymyr Mykhailenko |  UKR | ATH | Olympics | 2000 | 0–1–0 2001 Beijing ATH silver: decathlon | 
| Andriy Mykhailychenko |  UKR | GAR | Olympics | 2004 | 1–1–0 2003 Daegu GYM gold: horizontal bar, silver: team | 
| John Mykkanen |  USA | SWM | Olympics | 1984 | 0–1–0 1985 Kobe SWI silver: 400 m freestyle | 
| Valentyna Myronchuk |  UKR | ATH | Olympics | 2016 | 1–1–0 2017 Taipei ATH gold: 20 km walk team; 2019 Napoli ATH silver: 20 km walk team | 
| Anatoly Myshkin |  RUS  URS | BKB | Olympics | 1976—1980 | 0–1–0 1973 Moskva BAS silver | 
| Jana Myšková-Klusáčková |  CZE | SWM | Olympics | 2004—2008 | 0–0–1 2005 İzmir SWI bronze: 100 m freestyle (competed as Jana Myšková) | 
| Piotr Myszka |  POL | SAL | Olympics | 2016—2020 | 0–2–0 2005 İzmir SAI silver: Windsurfer men, silver: team | 
| Dmytro Mytrofanov |  UKR | BOX | Olympics | 2016 | 1–0–0 2013 Kazan BOX gold: middleweight -75 kg | 
| Amadou N'Diaye |  SEN | ATH | Olympics | 2016 | 0–1–0 2013 Kazan ATH silver: 400 m hurdles | 
| Elsa N'Guessan |  FRA | SWM | Olympics | 2004 | 0–0–2 2005 İzmir SWI bronze: 4×100 m freestyle relay and 4×200 m freestyle relay | 
| Jonathan N'Senga |  BEL | ATH | Olympics | 1996—2000 | 1–2–0 1995 Fukuoka ATH gold: 110 m hurdles; 1997 Catania ATH silver: 110 m hurdles; 1999 Palma de Mallorca ATH silver: 110 m hurdles | 
| Heiki Nabi |  EST | WRE | Olympics / Other | 2012—2016 | 0–0–1 2005 İzmir WRE bronze: Greco-Roman heavyweight -96 kg | 
| Khurshid Nabiyev |  UZB | JUD | Olympics | 2008 | 1–0–0 2007 Bangkok JUD gold: middleweight -90 kg | 
| Oleksandr Nadtoka |  UKR | ROW | Olympics | 2016 | 0–2–0 2013 Kazan ROW silver: double sculls; 2015 Gwangju ROW silver: eights | 
| Kensuke Nagai |  JPN | FBL | Olympics | 2012 | 0–0–1 2009 Beograd FTB bronze | 
| Tomoko Nagai |  JPN | SWM | Olympics | 2004 | 0–0–2 2003 Daegu SWI bronze: 100 m freestyle and 4×100 m medley relay | 
| Yuri Nagai |  JPN | HOC | Olympics | 2016—2020 | 0–0–1 2013 Kazan HOK bronze | 
| Takanori Nagase |  JPN | JUD | Olympics | 2016—2020 | 2–0–0 2013 Kazan JUD gold: half-middleweight -81 kg and team | 
| Gerd Nagel |  FRG | ATH | Olympics | 1984 | 1–0–2 1979 Ciudad de México ATH gold: high jump; 1981 București ATH bronze: high jump; 1985 Kobe ATH bronze: high jump | 
| István Nagy |  HUN | ATH | Olympics | 1980 | 0–1–0 1981 București ATH silver: 200 m | 
| Péter Nagy |  HUN | WLF | Olympics | 2012—2020 | 1–0–0 2011 Shenzhen WLT gold: super-heavyweight +105 kg | 
| Tímea Nagy |  HUN | FEN | Olympics | 1996—2004 | 6–0–0 1989 Duisburg FEN gold: épée team; 1993 Buffalo FEN gold: épée team; 1995 Fukuoka FEN gold: épée and épée team; 1997 Catania FEN gold: épée and épée team | 
| Viktor Nagy |  HUN | WPO | Olympics | 2012—2020 | 0–1–0 2005 İzmir WAP silver | 
| Zsigmond Nagy |  HUN | ATH | Olympics | 1960—1964 | 1–1–1 1959 Torino ATH silver: shot put; 1961 Sofia ATH bronze: shot put; 1963 Porto Alegre ATH gold: shot put | 
| Miroslava Najdanovski |  SRB  SCG | SWM | Olympics | 2004—2012 | 0–0–1 2009 Beograd SWI bronze: 100 m freestyle (competed for Serbia) | 
| Mai Nakagawa |  JPN | DIV | Olympics | 2008—2012 | 0–0–3 2007 Bangkok DIV bronze: platform and synchronized platform; 2015 Gwangju DIV bronze: platform | 
| Isao Nakajima |  JPN | SWM | Olympics | 1964 | 0–0–1 1963 Porto Alegre SWI bronze: 200 m butterfly | 
| Kanami Nakamaki |  JPN | SWA | Olympics | 2016 | 0–2–0 2013 Kazan SYN silver: team and team Free Routine Combination | 
| Katsumi Nakamura |  JPN | SWM | Olympics | 2016—2020 | 0–2–2 2013 Kazan SWI silver: 4×100 m medley relay; 2017 Taipei SWI silver: 50 m freestyle, bronze: 100 m freestyle and 4×100 m medley relay | 
| Kenzo Nakamura |  JPN | JUD | Olympics | 1996—2000 | 1–0–1 1995 Fukuoka JUD gold: lightweight -71 kg, bronze: team | 
| Mai Nakamura |  JPN | SWM | Olympics | 1996—2000 | 1–1–0 2001 Beijing SWI gold: 100 m backstroke, silver: 50 m backstroke | 
| Reiko Nakamura |  JPN | SWM | Olympics | 2004—2008 | 2–1–1 2001 Beijing SWI gold: 200 m backstroke; 2003 Daegu SWI gold: 200 m backstroke, silver: 100 m backstroke, bronze: 4×100 m medley relay | 
| Yuko Nakanishi |  JPN | SWM | Olympics | 2000—2008 | 1–0–0 2001 Beijing SWI gold: 200 m butterfly | 
| Nozomi Nakano-Sato |  JPN | FEN | Olympics | 2012—2020 | 0–0–2 2007 Bangkok FEN bronze: foil team; 2009 Beograd FEN bronze: épée | 
| Ayako Nakano |  JPN | SWM | Olympics | 1988—1992 | 0–1–1 1993 Buffalo SWI silver: 4×100 m medley relay, bronze: 100 m freestyle | 
| Hiroyuki Nakano |  JPN | ATH | Olympics | 2012 | 0–1–0 2011 Shenzhen ATH silver: 4×400 m relay | 
| Peko Nakano |  JPN | VBV | Olympics | 1996 | 1–0–0 1985 Kobe VOL gold | 
| Satoru Nakano |  JPN | SWM | Olympics | 1964—1968 | 0–0–2 1967 Tokyo SWI bronze: 4×100 m freestyle relay and 4×200 m freestyle relay | 
| Takashi Nakano |  JPN | SWM | Olympics | 2008 | 0–3–0 2003 Daegu SWI silver: 200 m backstroke; 2005 İzmir SWI silver: 200 m backstroke; 2007 Bangkok SWI silver: 200 m backstroke | 
| Miki Nakao |  JPN | SWM | Olympics | 1996—2000 | 2–0–0 1997 Catania SWI gold: 200 m backstroke; 1999 Palma de Mallorca SWI gold: 200 m backstroke | 
| Takuya Nakase |  JPN | GAR | Olympics | 2008 | 2–1–0 2009 Beograd GYM gold: parallel bars and team, silver: horizontal bar | 
| Masami Nakata |  JPN | GRY | Olympics | 2000 | 0–2–1 2003 Daegu RGY silver: group all-around and group 5 ribbons, bronze: group 3 hoops + 2 balls | 
| Katsuhiko Nakaya |  BRA | ATH | Olympics | 1980—1984 | 0–0–1 1981 București ATH bronze: 4×400 m relay | 
| Akinori Nakayama |  JPN | GAR | Olympics | 1968—1972 | 4–0–0 1965 Budapest GYM gold: all-around and team; 1967 Tokyo GYM gold: all-around and team | 
| Seira Nakayama |  JPN | FEN | Olympics | 2012 | 0–1–0 2005 İzmir FEN silver: sabre team | 
| Danira Nakić |  CRO  YUG | BKB | Olympics | 1988 | 1–0–0 1987 Zagreb BAS gold | 
| Nam Hyeon-Hui |  KOR | FEN | Olympics | 2004—2016 | 1–2–0 2003 Daegu FEN gold: foil, silver: foil team; 2005 İzmir FEN silver: foil team | 
| Andrea Nannini |  ITA | VVO | Olympics | 1976 | 1–0–0 1970 Torino VOL gold | 
| Ryan Napoleon |  AUS | SWM | Olympics | 2012 | 1–0–1 2013 Kazan SWI gold: 400 m freestyle, bronze: 4×200 m freestyle relay | 
| Arminas Narbekovas |  LTU  URS | FBL | Olympics | 1988 | 1–0–0 1987 Zagreb FTB gold | 
| Ante Nardeli |  CRO  YUG | WPO | Olympics | 1960—1964 | 2–0–0 1959 Torino WAP gold; 1961 Sofia WAP gold | 
| Kenji Narisako |  JPN | ATH | Olympics | 2008 | 1–1–0 2005 İzmir ATH gold: 400 m hurdles, silver: 4×400 m relay | 
| Oleksandr Nartov |  UKR | ATH | Olympics | 2008 | 0–0–1 2007 Bangkok ATH bronze: high jump | 
| Marvin Nash |  CAN | ATH | Olympics | 1976 | 0–1–0 1975 Roma ATH silver: 4×100 m relay | 
| Steve Nash |  CAN | BKB | Olympics | 2000 | 0–1–0 1993 Buffalo BAS silver | 
| Rozaliya Nasretdinova |  RUS | SWM | Olympics / YOG | 2014—2016 | 1–0–1 2015 Gwangju SWI gold: 50 m freestyle, bronze: 4×100 m freestyle relay | 
| Katja Nass |  GER | FEN | Olympics | 1996—2000 | 1–1–1 1993 Buffalo FEN bronze: épée team; 1995 Fukuoka FEN gold: foil team, silver: épée | 
| Liliana Năstase |  ROU | ATH | Olympics | 1992—1996 | 1–1–0 1985 Kobe ATH silver: heptathlon; 1987 Zagreb ATH gold: heptathlon | 
| Vasile Năstase |  ROU | ROW | Olympics | 1992 | 2–0–0 1987 Zagreb ROW gold: coxed fours; 1989 Duisburg ROW gold: coxed fours | 
| Musa Nastuiev |  UKR | JUD | Olympics | 2004 | 0–1–0 1999 Palma de Mallorca JUD silver: half-lightweight -66 kg | 
| Goran Nava |  SRB | ATH | Olympics | 2008 | 0–1–1 2009 Beograd ATH silver: 800 m, bronze: 1500 m | 
| Mohamed Reza Navaie |  IRI | WRE | Olympics | 1976 | 0–1–0 1973 Moskva WRE silver: freestyle featherweight -62 kg | 
| Ignas Navakauskas |  LTU | CSP | Olympics | 2016 | 1–0–0 2013 Kazan CAN gold: K1 200 m | 
| Mara Navarria |  ITA | FEN | Olympics | 2012—2020 | 0–0–1 2009 Beograd FEN bronze: épée team | 
| Daria Navumava |  BLR | WLF | Olympics | 2016—2020 | 0–1–0 2017 Taipei WLT silver: middle-heavyweight -75 kg | 
| Anastasiya Nazarenko |  RUS | GRY | Olympics | 2012 | 3–0–0 2013 Kazan RGY gold: group all-around, group 10 clubs, and group 3 balls + 2 ribbons | 
| Anna Nazarova |  RUS | ATH | Olympics | 2012 | 1–0–0 2011 Shenzhen ATH gold: long jump | 
| Irina Nazarova |  RUS  URS | ATH | Olympics | 1980 | 1–0–1 1981 București ATH gold: 4×400 m relay, bronze: 200 m | 
| Nataliya Nazarova |  RUS | ATH | Olympics | 2000—2012 | 2–0–0 2005 İzmir ATH gold: 400 m and 4×400 m relay | 
| Armen Nazaryan |  ARM | JUD | Olympics | 2004—2012 | 0–0–1 2007 Bangkok JUD bronze: half-lightweight -66 kg | 
| Vladimir Nazlymov |  RUS  URS | FEN | Olympics / Referee | 1968—1988 | 3–0–1 1970 Torino FEN gold: sabre team, bronze: sabre; 1973 Moskva FEN gold: sabre and sabre team | 
| Aurel Neagu |  ROU | WRE | Olympics | 1980 | 0–0–1 1981 București WRE bronze: freestyle bantamweight -57 kg | 
| Dragoș Neagu |  ROU | ROW | Olympics | 1988—1992 | 2–0–0 1987 Zagreb ROW gold: coxless pairs; 1989 Duisburg ROW gold: coxless pairs | 
| Lia Neal |  USA | SWM | Olympics | 2012—2016 | 1–0–0 2015 Gwangju SWI gold: 4×100 m freestyle relay | 
| György Nébald |  HUN | FEN | Olympics | 1980—1992 | 0–2–0 1977 Sofia FEN silver: sabre team; 1979 Ciudad de México FEN silver: sabre team | 
| Rudolf Nébald |  HUN | FEN | Olympics | 1980 | 0–1–0 1979 Ciudad de México FEN silver: sabre team | 
| Yelena Nechayeva |  RUS | FEN | Olympics | 2004—2008 | 2–2–1 2001 Beijing FEN gold: sabre team; 2003 Daegu FEN silver: sabre and sabre team; 2005 İzmir FEN gold: sabre team, bronze: sabre | 
| Emilian Necula |  ROU | GAR | Olympics | 1984 | 2–0–1 1981 București GYM gold: horizontal bar and team, bronze: rings | 
| Veronica Necula |  ROU | ROW | Olympics | 1988—1992 | 1–1–0 1993 Buffalo ROW gold: quadruple sculls. silver: coxless fours | 
| Anastasiya Nedobiha |  UKR | DIV | Olympics | 2016 | 1–0–0 2017 Taipei DIV gold: mixed synchronized platform | 
| Diego Negri |  ITA | SAL | Olympics | 2000—2008 | 0–0–1 1999 Palma de Mallorca SAI bronze: Laser | 
| Iulia Negură |  ROU | ATH | Olympics | 1996 | 2–0–0 1993 Buffalo ATH gold: 10000 m; 1995 Fukuoka ATH gold: 10000 m | 
| Nicolae Neguț |  ROU | WRE | Olympics | 1968—1972 | 0–0–1 1973 Moskva WRE bronze: Greco-Roman light-heavyweight -90 kg | 
| Kathrin Neimke |  GDR  GER | ATH | Olympics | 1988—1996 | 0–1–0 1987 Zagreb ATH silver: shot put (competed for East Germany) | 
| Adam Nelson |  USA | ATH | Olympics | 2000—2008 | 0–1–0 1999 Palma de Mallorca ATH silver: shot put | 
| Carey Nelson |  CAN | ATH | Olympics | 1988—1996 | 0–1–0 1985 Kobe ATH silver: 5000 m | 
| John Nelson |  USA | SWM | Olympics | 1964—1968 | 1–0–0 1967 Tokyo SWI gold: 4×200 m freestyle relay | 
| Van Nelson |  USA | ATH | Olympics | 1968 | 0–2–0 1967 Tokyo ATH silver: 5000 m and 10000 m | 
| Zsolt Nemcsik |  HUN | FEN | Olympics | 2000—2008 | 1–1–0 1997 Catania FEN silver: sabre team; 1999 Palma de Mallorca FEN gold: sabre team | 
| Zoltán Nemere |  HUN | FEN | Olympics | 1964—1968 | 2–1–0 1963 Porto Alegre FEN silver: épée team; 1965 Budapest FEN gold: épée and épée team | 
| Miklós Németh |  HUN | ATH | Olympics / Other | 1968—1980 | 1–0–0 1970 Torino ATH gold: javelin throw | 
| Zsolt Németh |  HUN | ATH | Olympics | 1996—2000 | 1–0–0 1999 Palma de Mallorca ATH gold: hammer throw | 
| Zsolt Németh |  HUN | FEN | Olympics | 1992 | 1–1–0 1985 Kobe FEN gold: foil team; 1989 Duisburg FEN silver: foil team | 
| Cornel Nemțoc |  ROU | ROW | Olympics | 1996—2000 | 1–0–0 1993 Buffalo ROW gold: coxed fours | 
| Andrea Nencini |  ITA | VVO | Olympics | 1976 | 1–0–0 1970 Torino VOL gold | 
| Margarita Nesterova |  RUS | SWM | Olympics | 2012 | 2–0–1 2013 Kazan SWI gold: 4×100 m freestyle relay and 4×100 m medley relay (swam in heats only); 2015 Gwangju SWI bronze: 4×100 m freestyle relay | 
| Hein-Direck Neu |  FRG | ATH | Olympics | 1968—1976 | 0–2–0 1967 Tokyo ATH silver: discus throw; 1970 Torino ATH silver: discus throw | 
| Nadine Neumann |  AUS | SWM | Olympics | 1996 | 0–1–1 1995 Fukuoka SWI silver: 200 m breaststroke, bronze: 100 m breaststroke | 
| Kiley Neushul |  USA | WPO | Olympics | 2016 | 1–0–0 2017 Taipei WAP gold | 
| Larissa Nevierov |  ITA | SAL | Olympics | 2000—2008 | 0–0–1 1999 Palma de Mallorca SAI bronze: Europe | 
| Maureen New |  CAN | SWM | Olympics | 1984 | 0–0–1 1983 Edmonton SWI bronze: 4×100 m freestyle relay | 
| Brent Newdick |  NZL | ATH | Olympics | 2012 | 0–1–1 2009 Beograd ATH silver: decathlon; 2013 Kazan ATH bronze: decathlon | 
| Joy Newman |  GBR | DIV | Olympics | 1964 | 1–0–0 1965 Budapest DIV gold: platform | 
| Ng Yan Yee |  MAS | DIV | Olympics | 2012—2020 | 0–0–1 2011 Shenzhen DIV bronze: team | 
| Patapol Ngernsrisuk |  THA | BDM | Olympics | 2004 | 2–0–0 2007 Bangkok BDM gold: doubles and team | 
| Quedjau Nhabali |  UKR | JUD | Olympics | 2016—2020 | 0–0–1 2011 Shenzhen JUD bronze: team | 
| Ni Hong |  CHN | FEN | Olympics | 2008 | 0–0–1 2009 Beograd FEN bronze: sabre | 
| Ousmane Niang |  SEN | ATH | Olympics | 2000 | 0–0–1 1999 Palma de Mallorca ATH bronze: 4×400 m relay | 
| Günther Nickel |  FRG | ATH | Olympics | 1972 | 0–1–0 1970 Torino ATH silver: 110 m hurdles | 
| Christian Nicolau |  FRA | ATH | Olympics | 1968 | 0–0–1 1970 Torino ATH bronze: 4×400 m relay | 
| Cristina Nicolau |  ROU | ATH | Olympics | 2000 | 0–0–1 1997 Catania ATH bronze: long jump | 
| Wayde van Niekerk |  RSA | ATH | Olympics / Other | 2016—2020 | 0–0–1 2013 Kazan ATH bronze: 4×400 m relay | 
| Ivan Nifontov |  RUS | JUD | Olympics | 2012 | 0–0–1 2007 Bangkok JUD bronze: team | 
| Gabriel Nigon |  SUI | FEN | Olympics | 1984 | 0–1–0 1981 București FEN silver: épée team | 
| Aleksey Nikanchikov |  BLR  URS | FEN | Olympics | 1964—1968 | 0–1–1 1965 Budapest FEN silver: épée team, bronze: épée | 
| Viktoriya Nikishina |  RUS | FEN | Olympics | 2008 | 0–0–1 2003 Daegu FEN bronze: foil team | 
| Bohdan Nikishyn |  UKR | FEN | Olympics / Other | 2004—2020 | 1–0–0 2003 Daegu FEN gold: épée team | 
| Mandy Niklaus |  GDR | FEN | Olympics | 1980 | 1–0–1 1979 Ciudad de México FEN gold: foil team, bronze: foil (competed as Mandy Dick) | 
| Volodymyr Nikolaichuk |  UKR | SWM | Olympics | 1996—2004 | 1–1–2 2001 Beijing SWI silver: 4×100 m medley relay, bronze: 100 m backstroke; 2003 Daegu SWI gold: 4×100 m medley relay, bronze: 100 m backstroke | 
| Jelena Nikolić |  SRB | VVO | Olympics | 2008—2016 | 0–1–0 2009 Beograd VOL silver | 
| Valentina Nikonova |  RUS  URS | FEN | Olympics | 1976 | 0–2–0 1973 Moskva FEN silver: foil and foil team | 
| Igor Nikulin |  RUS  EUN | ATH | Olympics | 1992 | 0–0–2 1981 București ATH bronze: hammer throw (competed for the Soviet Union); 1985 Kobe ATH bronze: hammer throw (competed for West Germany) | 
| Alexandru Nilca |  ROU | FEN | Olympics | 1976—1980 | 1–0–0 1977 Sofia FEN gold: sabre team | 
| Issam Nima |  ALG | ATH | Olympics / Non-starter | 2008—2012 | 0–1–0 2005 İzmir ATH silver: long jump | 
| Yevheniya Nimchenko |  UKR | ROW | Olympics | 2016 | 1–1–1 2013 Kazan ROW bronze: lightweight coxless fours; 2015 Gwangju ROW gold: lightweight coxless fours, silver: coxless pairs | 
| Luis Niño |  MEX | DIV | Olympics | 1964—1968 | 0–1–0 1967 Tokyo DIV silver: 3 m springboard | 
| Kazuhiro Ninomiya |  JPN | JUD | Olympics | 1976 | 1–0–0 1967 Tokyo JUD gold: half-middleweight -93 kg | 
| Violeta Ninova-Yordanova |  BUL | ROW | Olympics | 1988—1992 | 0–1–0 1987 Zagreb ROW silver: quadruple sculls (competed as Violeta Ninova) | 
| Ljudmila Ninova |  AUT | ATH | Olympics | 1992—1996 | 0–1–0 1987 Zagreb ATH silver: long jump (competed for Bulgaria) | 
| Rangsiya Nisaisom |  THA | TKW | Olympics | 2012 | 0–0–1 2015 Gwangju TKW bronze: featherweight -57 kg | 
| Darko Nišavić |  SRB  YUG | WRE | Olympics | 1976—1980 | 0–2–0 1973 Moskva WRE silver: Greco-Roman light-heavyweight -90 kg; 1977 Sofia WRE silver: Greco-Roman light-heavyweight -90 kg | 
| Daisuke Nishikawa |  JPN | GAR | Olympics | 1988—1992 | 0–3–1 1991 Sheffield GYM silver: all-around and team, bronze: rings; 1993 Buffalo GYM silver: floor |