| Thiasos Panos Kalogerikos | Thiasos Panos Kalogerikos | 1910 | 1 | |
| Tavistock Repertory Company | Tavistock Repertory Company | 1933 – 2004 | 23 | |
| Transvaalse Raad vir die Uitvoerende Kunste | Transvaalse Raad vir die Uitvoerende Kunste | 1985 | 1 | |
| Teaterfestivalen på Stiklestad | Teaterfestivalen på Stiklestad | 2010 | 1 | |
| Toneelgroep De Appel | Toneelgroep De Appel | 1973 – 2003 | 5 | |
| Trupa Anastazego Trapszy i Bolesława Kremskiego | Trupa Anastazego Trapszy i Bolesława Kremskiego | 1882 | 1 | |
| Thiasos Athanasios Marikos-Emmanouil Kantiotis | Thiasos Athanasios Marikos-Emmanouil Kantiotis | 1916 | 1 | |
| Twelve Three And A Half | Twelve Three And A Half | 2005 – 2006 | 3 | |
| Tara Arts UK | Tara Arts UK | 2006 | 18 | |
| Trupa Eugeniusza Majdrowicza | Trupa Eugeniusza Majdrowicza | 1904 | 1 | |
| TTU Tech Players | TTU Tech Players | 2006 | 1 | |
| Thanhouser Company | Thanhouser Company | 1909 | 3 | |
| Temporada Alta | Temporada Alta | 2006 | 1 | |
| Theater Oberhausen | Theater Oberhausen | 1999 – 2016 | 18 | |
| Thiasos Tilemachos Lepeniotis | Thiasos Tilemachos Lepeniotis | 1914 | 1 | |
| Teatr Wielki | Teatr Wielki | | | |
| Thiasos tis Ellinikis Komodias – Eftychios Vonaseras-Evangel | Thiasos tis Ellinikis Komodias – Eftychios Vonaseras-Evangel | 1898 | 1 | |
| Thiasos Evangelos Pantopoulos | Thiasos Evangelos Pantopoulos | 1903 | 3 | |
| Theatrinon Theatres | Theatrinon Theatres | 2006 – 2007 | 4 | |
| Trupa Karola Adwentowicza | Trupa Karola Adwentowicza | 1908 | 10 | |
| Theaterfestival Deutscher Sprache | Theaterfestival Deutscher Sprache | 2002 – 2003 | 2 | |
| Thanhouser | Thanhouser | 1911 | 1 | |
| Teater Grimsborken | Teater Grimsborken | 2005 – 2007 | 91 | |
| Theatre Four | Theatre Four | 1963 | 1 | |
| Three P's Society of Tufts College, The | The Three P's Society of Tufts College | 1913 | 1 | |
| Theatraubling | Theatraubling | 1997 – 2001 | 2 | |
| Toneelgroep Amsterdam | Toneelgroep Amsterdam | 1990 – 2021 | 107 | |
| Teatar «Salsa i smjah» | Teatar «Salsa i smjah» | 1924 | 1 | |
| Teatrón | Teatrón | 1989 | 1 | |
| Thalia Theater | Thalia Theater | 1975 – 2011 | 20 | |
| Teater Västernorrland | Teater Västernorrland | 1996 – 2001 | 6 | |
| Theater am Bülowplatz | Theater am Bülowplatz | 1918 | 5 | |
| Tin Alley Players | Tin Alley Players | 1945 | 1 | |
| Thiasos Nikolaos Plessas | Thiasos Nikolaos Plessas | 1911 | 4 | |
| Theatergruppe Sankt Georgen, Die | Die Theatergruppe Sankt Georgen | 2001 | 1 | |
| Thiasos (Konstantinos Vonaseras?) | Thiasos (Konstantinos Vonaseras?) | 1896 | 1 | |
| Thiasos Koula Zervou | Thiasos Koula Zervou | 1921 | 1 | |
| Tisch School Of The Arts | Tisch School Of The Arts | 2005 – 2007 | 2 | |
| Thiasos Dimosthenis Alexiadis | Thiasos Dimosthenis Alexiadis | 1901 | 1 | |
| Teatr Letni w Ogrodzie Bernardyńskim | Teatr Letni w Ogrodzie Bernardyńskim | 1907 | 1 | |
| Trupa operetkowa Juliana Grabińskiego | Trupa operetkowa Juliana Grabińskiego | 1884 | 1 | |
| Tyrili Teatret | Tyrili Teatret | 1991 | 1 | |
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