| MARMAC 302 A Shortfall Of Gravitas, SpaceX Autonomous Spaceport Drone Ship | - | US | 0 | SHIP |
| MARMAC 303 Just Read The Instructions, SpaceX Autonomous Spaceport Drone Ship | - | US | 0 | SHIP |
| MARMAC 304 Of Course I Still Love You, SpaceX Autonomous Spaceport Drone Ship | - | US | 0 | SHIP |
| MARS Pad 0A | - | | 0 | LP |
| MARS Pad 0B | - | | 0 | LP |
| MARS Pad 0C | - | | 0 | LP |
| MARS Pad 0D | - | | 0 | LP |
| Masikryon Ski Resort, Wonsan/Kittaeryong (Gitdaeryung), Kangwon-do (Kalma Airport, Wonsan/Kittaeryong (Gitdaeryung), Kangwon-do) | - | | 0 | LP |
| MAST launcher, Launch Area 4, Wallops Flight Facility (Wallops Flight Facility, Wallops Island, Virginia) | - | | 0 | LP |
| Matagorda Island, Texas | - | US | 0 | LS |
| Matagorda Island, Texas (location) | - | | 0 | LS |
| Mayak-1 silo, GTsP-4, Kapustin Yar (GTsP-4, Kapustin Yar, Volgograd, Rossiya) | - | | 0 | LP |
| Mayak-2 silo, GTsP-4, Kapustin Yar (GTsP-4, Kapustin Yar, Volgograd, Rossiya) | - | | 24 | LP |
| McGregor Range, Fort Bliss, New Mexico (White Sands) (Hueco Range, Fort Bliss, Texas) | - | | 0 | LP |
| McMurdo Station, Ross Ice Shelf, New Zealand Antarctic Territory | - | NZ | 0 | LS |
| Meck Island, USAKA, Marshall Islands (US Army Kwajalein Atoll (USAKA), Marshall Islands) | - | | 0 | LP |
| Mercury, Nevada | - | US | 0 | LS |
| Mercury, Nevada (location) | - | | 0 | LS |
| MESOS launch point, Black Rock Desert, Nevada | - | | 0 | LP |
| Meteo Rocket Ship Launch Area, 180E 0N (AntiMeridian), Pacific Ocean | Pacific Ocean | US | 0 | LZ |
| Meteo Rocket Ship Launch Area, 54E 6N (Chain Ridge), Indian Ocean (Meteo Rocket Ship Launch Area, Indian Ocean) | Indian Ocean | | 0 | LP |
| Meteo Rocket Ship Launch Area, 65E 0N (Carlsberg Ridge), Indian Ocean (Meteo Rocket Ship Launch Area, Indian Ocean) | Indian Ocean | | 0 | LP |
| Meteo Rocket Ship Launch Area, 65E 10S (Indian Cordillera), Indian Ocean M9163 (Meteo Rocket Ship Launch Area, Indian Ocean) | Indian Ocean | | 0 | LP |
| Meteo Rocket Ship Launch Area, 65E 40S, Central Indian Ocean (Meteo Rocket Ship Launch Area, Indian Ocean) | Indian Ocean | | 0 | LP |
| Meteo Rocket Ship Launch Area, 70E 0N Indian Ocean (Meteo Rocket Ship Launch Area, Indian Ocean) | Indian Ocean | | 0 | LP |
| Meteo Rocket Ship Launch Area, Indian Ocean | Indian Ocean | SU | 0 | LP |
| Meteo Rocket Ship Launch Area M9046, 65E 20S (Rodrigues Ridge), Indian Ocean (Meteo Rocket Ship Launch Area, Indian Ocean) | Indian Ocean | | 0 | LP |
| Meteo Rocket Ship Launch Area, Minia Seamount region, N Atlantic Ocean | Atlantic Ocean | SU | 0 | LZ |
| Meteo Rocket Ship Launch Area, Ninety East Ridge region, Indian Ocean | Indian Ocean | SU | 0 | LZ |
| Meteo Rocket Ship Launch Area, Ontong Java Plateau region, SW Pacific Ocean | - | SU | 0 | LZ |
| Meteo Rocket Ship Launch Area, Somali Abyssal Plain, Indian Ocean | - | SU | 0 | LZ |
| Meteo Rocket Ship Launch Area, Somali Abyssal Plain, Indian Ocean (location) | - | | 0 | LZ |
| Meteo Rocket Ship Launch point, Leclaire Rise, Kerguelen Is. (Kerguelen Range, Port-Aux-Francais, Kerguelen Island) | - | | 0 | LP |
| MHV BAR | - | | 0 | LP |
| MHV KVAL | - | | 0 | LP |
| MHV LP1 | - | | 0 | LP |
| MHV LP3 | - | | 0 | LP |
| MHV RW12/30 | - | | 0 | LP |
| MHV RW30 | - | | 0 | LP |
| Michigan Cruise 1956, Launch Point 1 (USS Rushmore U. Michigan Cruise 1956) | Atlantic Ocean | | 0 | LP |
| Michigan Cruise 1956, Launch Point 2 (USS Rushmore U. Michigan Cruise 1956) | Atlantic Ocean | | 0 | LP |
| Michigan Cruise 1956, Launch Point 3 (USS Rushmore U. Michigan Cruise 1956) | Atlantic Ocean | | 0 | LP |
| Michigan Cruise 1956, Launch Point 4 (USS Rushmore U. Michigan Cruise 1956) | Atlantic Ocean | | 0 | LP |
| Michigan Cruise 1956, Launch Point 5 (USS Rushmore U. Michigan Cruise 1956) | Atlantic Ocean | | 0 | LP |
| Mid-Atlantic Regional Spaceport, Wallops Island, Virginia | - | US | 0 | LP |
| MID LP1 | - | | 0 | LP |
| MID LP1 (location) | - | | 0 | LP |
| MID LP2 | - | | 0 | LP |
| MID LP2 (location) | - | | 0 | LP |
| MID LP3 | - | | 0 | LP |