| IM Mushilla (1966), Isabella |  KEN | – |
| HM Mushom, Hakon |  NOR | 1993 |
| AM Mushonga (1981), Aneso |  ZIM | – |
| BM Musić, Bakir |  BIH | 2006 |
| MM Musiiwa, Manonoke | ZIM | – |
| SM Musil, Samantha |  USA | 1988 |
| NM Musilova, Nikola |  CZE | 2006 |
| TM Musinde, Tom | KEN | 1979 |
 Musinschi, Iaroslav |  MDA | 1976 |
| IM Musiyenko, Ihor |  UKR | 1993 |
| NM Musiyenko, Nikolay Triple jump |  URS | 1959 |
| MM Muskan, Muskan |  IND | 2008 |
| JM Muskovic, Jovan |  JUG | 1947 |
| AM Musku, Aarno |  FIN | 1939–1997 |
| OM Muskwe, Osman |  GBR | 1985 |
| EM Musler, Elodie |  FRA | 1984 |
| AM Muslim, Ashraf |  EGY | 2003 |
| MM Muslim (1971), Mohamed Ismail | EGY | – |
| HM Muslina (1972), Helena |  INA | – |
| DM Musobo, Deogracius |  UGA | 1997 |
| AM Musoev, Abdurauf |  TJK | 1996 |
| EM Musonda, Evelyn |  ZAM | – |
| MM Musonge, Moses | UGA | 1968 |
| WM Musonik (1957), Wilson | KEN | – |
| AM Musonye (1958), Adriano | KEN | – |
| JM Muspratt , J. P. | GBR | – |
| EM Mussard, Emma | FRA | 2002 |
| MM Musselmann, Marie |  PER | – |
| VM Mussi, Viviana |  ARG | 1982 |
| MM Musso, Maria |  ITA | 1931–2024 |
| EM Mustafa, Esraa Mohamed | EGY | 1997 |
| HM Mustafa, H. |  SYR | – |
| MM Mustafa, Mohammed Nazi |  MAS | – |
| WM Mustafa, Walid Jamal | EGY | 1977 |
| AM Mustafa (1977), Akbar | MAS | – |
| MM Mustafa Ahmed, Moaz Mohamed | EGY | 1995 |
 Mustafa Seoud, Amr Ibrahim Sprints | EGY | 1986 |
| EM Mustafic, Eva |  CRO | 1998 |
| SM Mustafic, Selma |  SRB | 1995 |
| MM Mustafov, Mustafa |  BUL | 1963 |
| NM Mustalahti, Niilo | FIN | 2002 |
| MM Mustapha, Mohamed Elfi |  SIN | 1987 |
| SM Mustapha, Samir | SYR | – |
| DM Mustapic, Dragan Discus throw | JUG | 1963 |
| IM Mustapic (1931), Ivan | JUG | 1931 |
| IM Mustapic (1966), Ivan | CRO | 1966 |
| NM Mustata, Nicolae |  ROU | 1941 |
| MM Musteata, Marius Constantin | ROU | 1997 |
| HM Mustelier, Hector |  CUB | 1976 |
| PM Muster, Peter |  SUI | 1952 |
| WM Musto, Wilson | KEN | 1976 |
| TM Mustonen, Topias | FIN | 2007 |
| AM Musukuma (1962), Alick | ZAM | – |
| GM Musumusu, Gaston |  NCL | 1960 |
| JM Musungu, Joyce Jepkosgei | KEN | 1988 |
| .M Musyafidah, . | INA | – |
| GM Musyoki, Gladys Sprints · Long jump | KEN | 1994 |
| MM Musyoki, Mike | KEN | 1956 |
| FM Musyoki (1953), Francis | KEN | – |
| NM Musyoki (1968), Ngotho | KEN | – |
| LM Muta, Leticia |  TAN | – |
| DM Mutafchieva, Desislava | BUL | 1984 |
| SM Mutafov, Slavi | BUL | 2000 |
| SM Mutahi, Sammy | KEN | 1989 |
| AM Mutai, Abel Steeplechase | KEN | 1988 |
| BM Mutai, Beatrice | KEN | 1987 |
| DM Mutai, Daniel | KEN | – |
| EM Mutai, Emmanuel | KEN | 1984 |
| EM Mutai, Ezekiel | UGA | 2001 |
| GM Mutai, Geoffrey | KEN | 1981 |
| JM Mutai, Jeremiah | KEN | 1992 |
| MM Mutai, Mark | KEN | 1978 |
| MM Mutai, Mueni | KEN | – |
| SM Mutai, Solomon | UGA | 1992 |
| VM Mutai, Vincent | KEN | 1994 |
| CM Mutakanyi, Crispen | ZIM | 1970 |
| RM Mutale, Ruth | ZAM | 2004 |
| NM Mutalipov, Nodirbek |  UZB | 2001 |
| OM Mutanda, Olga |  CIV | 1967 |
| TM Mutanga, Tinashe | ZIM | 1993 |
| OM Mutanya, Obert | ZAM | 1981 |
| DM Mutariswa, Donovan | ZIM | 2001 |
 Mutay, Büşra |  TUR | 1994 |
| EM Muteb Sand, Endry |  COD | – |
| SM Muthali, Susan | ZAM | – |
 Muthee, Damaris | KEN | 1994–2022 |
| .M Muthen, . |  REU | – |
| EM Muthoka (1975), Elizabeth | KEN | – |
| PM Muthoni (2004), Peninah | KEN | – |
| TM Muthoni Gateri, Teresiah | KEN | 2002 |
| OM Muthumala, Omaya |  SRI | 1997 |
| NM Muthunayake, Nadeeka | SRI | 1980 |
| MM Muthurathinam, Mokavi | IND | 2002 |
| PM Muthusamy, Pandi | IND | 1983 |
| IM Muthuthandri, I.N.C. | SRI | – |
| NM Mutiara (2006), Nurul | INA | – |
| TM Mutie, Tom | KEN | 1994 |
 Mutile Yavi, Winfred OG Steeplechase |  BRN | 1999 |
| GM Mutinda, George | KEN | 2001 |
| JM Mutinda, John | KEN | – |
