| Marlborough College | Marlborough College | England, Marlborough, Wiltshire, Bath Road | 1999-04-29 | -- | 1999 | 1 | |
| Moskovskij dramatičeskij teatr | Moskovskij dramatičeskij teatr | Russia, Moscow | 1957-09-18 | -- | 1957 | 1 | |
| Music and Dramatic Arts Building, Louisiana State University | Music and Dramatic Arts Building, Louisiana State University | United States of America, Baton Rouge | 1937-01-14 | 1999-10-02 | 1937–1999 | 2 | |
| Moineşti | Moineşti | Romania, Moineşti | -- | -- | | | |
| Midtbygda Sentralskole | Midtbygda Sentralskole | Norway, Solfjellsjøen, Dønna, Solfjellsjøen, 8820 Dønna | 1971-03-13 | -- | 1971–1978 | 2 | |
| Mĕstské oblastní divadlo Kolín | Mĕstské oblastní divadlo Kolín | Czech Republic, Kolín | 1954-11-13 | -- | 1954–1957 | 2 | |
| Mozarts Plads | Mozarts Plads | Denmark, Hillerød, Kongens Vrænge 2 | 2014-08-29 | 2014-08-31 | 2014 | 1 | |
| Maskavas Latviešu teātris | Maskavas Latviešu teātris | Russia, Moscow, Moscow | 1917-01-14 | -- | 1917 | 1 | |
| Münchner Künstlertheater | Münchner Künstlertheater | Germany, Munich | 1909-08-20 | -- | 1909 | 1 | |
| Madách Kamara Színház | Madách Kamara Színház | Hungary, Budapest, Erzsébet körút 31 | 1920-04-15 | 1920-04-30 | 1920–1974 | 4 | |
| Matadero Madrid | Matadero Madrid | Spain, Madrid, Plaza de Legazpi, 8 | 2008-03-27 | 2008-04-27 | 2008–2020 | 2 | |
| Malraux - Scène nationale Chambéry Savoie | Malraux - Scène nationale Chambéry Savoie | France, Chambéry, 67 Place Président Mitterand | 2012-02-07 | 2014-04-25 | 2012–2014 | 2 | |
| Milwaukee Repertory Theater | Milwaukee Repertory Theater | United States of America, Milwaukee | 1967-08-01 | 1967-08-01 | 1967 | 1 | |
| Montgomery Theatre | Montgomery Theatre | United States of America, Montgomery | 1903-10-24 | 1904-11-12 | 1903–1904 | 3 | |
| Muziekgebouw aan 't IJ | Muziekgebouw aan 't IJ | Netherlands, Amsterdam, Piet Heinkade 1 | 2013-06-02 | 2013-06-04 | 2013 | 1 | |
| Mo i Rana | Mo i Rana | Norway, Mo i Rana | 1954-05-04 | -- | 1954–2005 | 9 | |
| Morosco's | Morosco's | United States of America, Los Angeles | 1899-11-10 | 1906-07-19 | 1899–1906 | 4 | |
| Mystic Seaport Museum | Mystic Seaport Museum | United States of America, Mystic, 75 Greenmanville Avenue | 2022-07-16 | -- | 2022 | 1 | |
| Meta-Teatro | Meta-Teatro | Italy, Rome, Via Natale Del Grande, 21 | 1988-03-16 | 1988-04-10 | 1988–1989 | 2 | |
| Metropolitan | Metropolitan | United States of America, Minneapolis | 1906-12-06 | 1910-08-10 | 1906–1910 | 2 | |
| Metropol-Theater | Metropol-Theater | Germany, Berlin, Friedrichstraße 100-102 | 1903-09-23 | 1905-06-11 | 1903–1910 | 4 | |
| Micklefield Hall | Micklefield Hall | England, Rickmansworth, Hertfordshire, Sarratt Rd, Sarratt | 2014-03-22 | 2014-03-28 | 2014 | 1 | |
| Malmö Stadsteater | Malmö Stadsteater | Sweden, Malmö, Kalendegatan 12 | 1951-11-29 | 2023-01-28 | 1951–2022 | 9 | |
| Moskovski teatr na Taganke | Moskovski teatr na Taganke | Russia, Moscow, Zemlyanoy Val, 76/21 | 2013-06-12 | -- | 2013 | 1 | |
| Minneapolis Theater Garage | Minneapolis Theater Garage | United States of America, 711 W Franklin Ave | 1998-07-31 | 1998-08-30 | 1998 | 1 | |
| M/S Vesterålen | M/S Vesterålen | Norway, Tromsø | 1994-03-24 | -- | 1994 | 1 | |
| Maximteatern | Maximteatern | Sweden, Borlänge, Tunagatan 42, | 2010-10-26 | -- | 2010 | 1 | |
| Městské divadlo Pardubice | Městské divadlo Pardubice | Czech Republic, Pardubice | 1939-10-03 | -- | 1939 | 1 | |
| Machinefabriek, Theater de | Theater de Machinefabriek | Netherlands, Groningen, Bloemstraat 38 | 2013-04-07 | 2016-05-14 | 2013–2016 | 3 | |
| Mestno gledališče Celje | Mestno gledališče Celje | Slovenia, Celje | 1925-10-23 | -- | 1925–1934 | 2 | |
| Minot University Black Box | Minot University Black Box | United States of America, Minot, 500 University Ave W | 2006-10-11 | 2006-10-12 | 2006 | 1 | |
| Micşuneştii Mari | Micşuneştii Mari | Romania, Micşuneştii Mari | -- | -- | | | |
| Memorial Hall Wish Theater | Memorial Hall Wish Theater | United States of America, Brunswick | 2007-03-01 | 2007-03-03 | 2007 | 1 | |
| Molde kino | Molde kino | Norway, Molde, Gotfried Lies Plass 1. 6415 Molde | 1963-02-20 | 1984-10-31 | 1963–1984 | 7 | |
| Mannheim | Mannheim | Germany, Mannheim | -- | -- | | | |
| Mariehamn | Mariehamn | Finland, Åland Islands | 1999-10-09 | 1999-10-24 | 1999 | 1 | |
| Moustier-Ventadour - Château de Ventadour | Moustier-Ventadour - Château de Ventadour | France | 2023-08-01 | 2023-07-21 | 2023 | 1 | |
| Microtheater | Microtheater | Netherlands, GX Delft, Kerkstraat 19 | 1994-11-15 | 1994-12-17 | 1994 | 1 | |
| Main Theatre, University of California | Main Theatre, University of California | United States of America, Davis, 1 Shields Ave | 1992-03-05 | 2000-12-10 | 1992–2000 | 3 | |
| Main Stage Theatre | Main Stage Theatre | United States of America, Addison, 15650 Addison Rd | 2018-10-12 | 2018-11-04 | 2018 | 1 | |
| Murray Hill Theatre | Murray Hill Theatre | United States of America, New York, 160 E. 34th Street | 1905-04-30 | -- | 1905 | 2 | |
| Masque Theater | Masque Theater | United States of America, New York | 1966-04-18 | -- | 1966 | 1 | |
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