| M&T Bank Stadium | Baltimore | 71,008 seats | September 6, 1998 | American football |
| Madison Square Garden | Manhattan | 15,925 seats | December 15, 1925 | — |
| Magness Arena | Denver | 7,200 seats | September 15, 1999 | — |
| Main Street Armory | Rochester | 6,500 seats | — | — |
| Manning Field at John L. Guidry Stadium | Louisiana | 10,500 seats | September 16, 1972 | — |
| Maple Leaf Gardens | Toronto | 12,473 seats | November 12, 1931 | ice hockey |
| Market Square Arena | Indianapolis | 16,530 seats | September 15, 1974 | ice hockey |
| Marriott Center | Provo | 20,951 seats | — | — |
| MassMutual Center | Springfield | 8,000 seats | September 5, 1972 | basketball, ice hockey |
| Matthew Knight Arena | Eugene | 12,364 seats | January 13, 2011 | — |
| McCamish Pavilion | Atlanta | 8,600 seats | November 30, 1956 | basketball |
| McCann Field House | New York | 3,200 seats | 1977 | — |
| McCulloch Park | — | 4,100 seats | 1892 | — |
| McHugh Forum | Chestnut Hill | 4,200 seats | — | — |
| McKechnie Field | Florida | 2,000 seats | 1923 | baseball |
| McKenzie Arena | Tennessee | 10,928 seats | October 8, 1982 | — |
| McNichols Sports Arena | Denver | 16,600 seats | August 22, 1975 | basketball |
| Meadowlands Arena | New Jersey | 20,049 seats | July 2, 1981 | basketball |
| Memorial Athletic and Convocation Center | — | 6,327 seats | December 2, 1950 | — |
| Memorial Auditorium | Moorhead | 6,000 seats | — | — |
| Memorial Gymnasium | Moscow | 2,500 seats | 1928 | — |
| Memorial Gymnasium | Virginia | 2,500 seats | 1924 | — |
| Memorial Stadium | Baltimore | 31,000 seats | December 2, 1922 | American football, baseball |
| Memorial Stadium | Fort Wayne | 6,516 seats | April 18, 1993 | baseball |
| Mercedes-Benz Stadium | Atlanta | 71,000 seats | August 26, 2017 | — |
| Met Center | Bloomington | 16,000 seats | 1967 | ice hockey |
| MetLife Stadium | East Rutherford | 82,500 seats | April 10, 2010 | American football |
| Metropolitan Stadium | Bloomington | 18,200 seats | April 24, 1956 | association football, American football, baseball |
| Michigan Stadium | Ann Arbor | 82,000 seats | October 1, 1927 | American football |
| Mile High Stadium | Denver | 51,706 seats | August 14, 1948 | baseball |
| Millett Hall | Ohio | 9,200 seats | December 2, 1968 | — |
| Milwaukee County Stadium | Milwaukee | 36,011 seats | April 6, 1953 | American football |
| Minneapolis Armory | Minneapolis | — | — | basketball |
| Minneapolis Auditorium | Minneapolis | — | — | — |
| Moda Center | Portland | 20,636 seats | October 12, 1995 | basketball |
| Mohegan Sun Arena | Connecticut | 9,518 seats | October 2001 | basketball |
| Montreal Forum | Ville-Marie | 17,959 seats | November 29, 1924 | ice hockey |
| Moody Coliseum | University Park | 9,007 seats | December 3, 1956 | basketball, volleyball |
| Mortgage Matchup Center | Phoenix | 19,023 seats | June 6, 1992 | basketball |
| Mount Royal Arena | Montreal | 6,000 seats | 1920 | ice hockey |
| Mountain America Stadium | Tempe | 64,248 seats | 1958 | American football |
| Mountaineer Field at Milan Puskar Stadium | Morgantown | 60,000 seats | September 6, 1980 | American football |
| Municipal Auditorium | Louisiana | — | May 30, 1930 | — |
| Municipal Stadium | Kansas City | 17,476 seats | July 3, 1923 | association football |
| Mutual Street Arena | Toronto | 6,000 seats | 1912 | ice hockey |
| MVP Arena | Albany | 15,357 seats | January 30, 1990 | ice hockey |
| Myrtle Beach Convention Center | South Carolina | 8,000 seats | — | — |