| Moineşti | Moineşti | Romania, Moineşti | -- | -- | | | |
| Mogilevskij Dramatičeski Teatr | Mogilevskij Dramatičeski Teatr (Mahilioŭ Regional Drama Theater) | Belarus, Mogilev, Pieršamajskaja St 7 | -- | -- | | | |
| Melbourne | Melbourne | Australia, Melbourne | -- | -- | | | |
| Murighiol | Murighiol | Romania, Murighiol | -- | -- | | | |
| Marxzell | Marxzell | Germany, Marxzell | -- | -- | | | |
| Moreni | Moreni | Romania, Moreni | -- | -- | | | |
| Meerbusch | Meerbusch | Germany, Meerbusch | -- | -- | | | |
| Micşuneştii Mari | Micşuneştii Mari | Romania, Micşuneştii Mari | -- | -- | | | |
| Magdeburg | Magdeburg | Germany, Magdeburg | -- | -- | | | |
| Miorcani (Rădăuţi-Prut) | Miorcani (Rădăuţi-Prut) | Romania, Miorcani (Rădăuţi-Prut) | -- | -- | | | |
| Moskovski dramatičeski teatr imeni A. Puškina | Moskovski dramatičeski teatr imeni A. Puškina | Russia, Moscow, Tverskoy Blvd, 23 | -- | 2019-05-18 | 2018 | 2 | |
| Middelburg | Middelburg | Netherlands, Middelburg | -- | -- | | | |
| Meiningen | Meiningen | Germany, Meiningen | -- | -- | | | |
| Manhatten | Manhatten | United States, Manhatten | -- | -- | | | |
| Mexico City | Mexico City | Mexico, Mexico City | -- | -- | | | |
| Marrucino | Teatro | Italy, Chieti | -- | -- | | | |
| Mărăşeşti | Mărăşeşti | Romania, Mărăşeşti | -- | -- | | | |
| Meteleu(Scutelnici) | Meteleu (Scutelnici) | Romania, Meteleu(Scutelnici) | -- | -- | | | |
| Manchester | Manchester | England, Manchester | -- | -- | | | |
| Mannheim | Mannheim | Germany, Mannheim | -- | -- | | | |
| Murfatlar (Basarabi) | Murfatlar (Basarabi) | Romania, Murfatlar (Basarabi) | -- | -- | | | |
| Mátray Béla Társulata | Mátray Béla Társulata | Romania, Arad | -- | -- | | | |
| Mélo d'Amélie | Mélo d'Amélie | France, Paris, 4 Rue Marie Stuart | -- | -- | | | |
| Mărculeşti | Mărculeşti | Romania, Mărculeşti | -- | -- | | | |
| Městské oblastní divadlo | Městské oblastní divadlo | Czech Republic, Kolín | -- | -- | | | |
| Măcin | Măcin | Romania, Măcin | -- | -- | | | |
| Milwaukee Repertory Theater | Milwaukee Repertory Theater | United States, Milwaukee | -- | -- | | | |
| Murnau | Murnau | United States, Murnau | -- | -- | | | |
| Michael Schimmel Center for the Arts | Michael Schimmel Center for the Arts | United States, New York, Spruce Street | -- | -- | | | |
| Molun zhongxue (Molun School) | Molun zhongxue (Molun School) | China, Shanghai | -- | -- | | | |
| Mindre Teatern | Mindre Teatern | Sweden, Gothenburg, Södra Hamngatan 61 | 1871-12-29 | 1890-05-09 | 1871–1892 | 11 | |
| Malmö Teater | Malmö Teater | Sweden, Malmö | 1872-02-01 | 1928-04-16 | 1872–1936 | 23 | |
| Marienwerder | Marienwerder | Poland, Kwidzyn | 1878-- | -- | 1878 | 1 | |
| Møllergadens Theater - Folketheatret | Møllergadens Theater - Folketheatret | Norway, Kristiania (Oslo) | 1878-11-06 | 1884-04-19 | 1878–1884 | 4 | |
| Mikhailovsky Theatre | Mikhailovsky Theatre | Russia, St. Petersburg, Arts Square | 1878-11-20 | -- | 1878 | 1 | |
| Middelfart Teater | Middelfart Teater | Denmark, Middelfart | 1883-10-19 | -- | 1883–1909 | 6 | |
| Moss | Moss | Norway, Moss | 1883-11-16 | 1971-10-07 | 1883–1982 | 10 | |
| Macauleys Theater | Macauleys Theater | United States, Louisville, 315 W Broadway | 1883-12-07 | 1906-12-29 | 1883–1906 | 3 | |
| Miskolc | Miskolc | Hungary, Miskolc | 1889-11-05 | 1928-02-16 | 1889–1944 | 29 | |
| Mezőtúr | Mezőtúr | Hungary, Mezőtúr | 1890-04-09 | -- | 1890–1930 | 6 | |
| Makó | Makó | Hungary, Makó | 1890-05-12 | -- | 1890–1940 | 14 | |
| Malyj Teatr | Malyj Teatr | Russia, Moscow, ul. Bol'shaya Serpuhovskaya, 44 | 1892-01-14 | -- | 1892–1972 | 9 | |
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