| Teater Mungo | Teater Mungo | 2002 | 28 | |
| Teatr Telewizji | Teatr Telewizji | 1969 – 2009 | 8 | |
| Théâtre du Vieux-Colombier | Théâtre du Vieux-Colombier | 1918 | 1 | |
| Théâtre du Rideau de Bruxelles | Théâtre du Rideau de Bruxelles | 2002 | 1 | |
| Theatre of Ireland | Theatre of Ireland | 1906 | 1 | |
| Tofusha | Tofusha | 1994 | 1 | |
| Toneelgroep Amsterdam | Toneelgroep Amsterdam | 1990 – 2021 | 108 | |
| Tampere Internasjonale Teaterfestival | Tampere Internasjonale Teaterfestival | 1993 | 1 | |
| Thiasos Dimosthenis Alexiadis | Thiasos Dimosthenis Alexiadis | 1901 | 1 | |
| Teaterkompaniet Røde Rom | Teaterkompaniet Røde Rom | 2009 – 2010 | 3 | |
| Tolstoy State Theatre | Tolstoy State Theatre | | | |
| Thorvald Larsens Tourné | Thorvald Larsens Tourné | 1926 | 4 | |
| Torosha | Torosha | 1918 | 1 | |
| Tokyo Geijutsuza / Gekijo (Tokyo Art Theatre) | Tokyo Geijutsuza / Gekijo (Tokyo Art Theatre) | 1914 – 1946 | 3 | |
| Tin Alley Players | Tin Alley Players | 1945 | 1 | |
| Teatr Mały | Teatr Mały | 1905 – 1913 | 2 | |
| Telefilm Saar | Telefilm Saar | 1974 | 2 | |
| Thiasos (Konstantinos Vonaseras?) | Thiasos (Konstantinos Vonaseras?) | 1896 | 1 | |
| Thelma Holt | Thelma Holt | 1994 | 3 | |
| Theatergroep M/V | Theatergroep M/V | 2004 | 9 | |
| Theater am Schiffbauerdamm | Theater am Schiffbauerdamm | 1950 – 2008 | 8 | |
| Tel Aviv-Yafo First International Theatre Festival | Tel Aviv-Yafo First International Theatre Festival | 2009 | 1 | |
| Thiasos Kathreftis | Thiasos Kathreftis | 2006 | 1 | |
| Thiasos Christina Kalogerikou | Thiasos Christina Kalogerikou | 1914 | 1 | |
| Theater Biel Solothurn | Theater Biel Solothurn | 2003 – 2019 | 25 | |
| Teatro Paulista | Teatro Paulista | 1956 | 1 | |
| Teatr Polski pod dyr. Władysława Czajkowskiego | Teatr Polski pod dyr. Władysława Czajkowskiego | 1904 | 1 | |
| Theatre Babel | Theatre Babel | 2004 – 2005 | 11 | |
| Theater der Modernen | Theater der Modernen | 1894 – 1895 | 11 | |
| Tønder-Turneen | Tønder-Turneen | 1910 | 2 | |
| Tokyo International Players | Tokyo International Players | 2004 | 1 | |
| Teatre Romea | Teatre Romea | 2003 – 2006 | 8 | |
| TTU Tech Players | TTU Tech Players | 2006 | 1 | |
| Teatr Nowy | Teatr Nowy | 1913 | 2 | |
| Tavistock Repertory Company | Tavistock Repertory Company | 1933 – 2004 | 23 | |
| Tower Theatre, The | The Tower Theatre | 2004 – 2020 | 4 | |
| Toneelgroep De Appel | Toneelgroep De Appel | 1973 – 2003 | 5 | |
| Théâtre Libre | Théâtre Libre | 1890 – 1894 | 9 | |
| Thiasos Thomas Oikonomou-Loukia Tiveri | Thiasos Thomas Oikonomou-Loukia Tiveri | 1909 | 1 | |
| Twelve Three And A Half | Twelve Three And A Half | 2005 – 2006 | 3 | |
| Tilla Durieux mit Ensemble des Deutschen Volkstheaters Wien | Tilla Durieux mit Ensemble des Deutschen Volkstheaters Wien | 1933 | 2 | |
| Tysnesfest 09 | Tysnesfest 09 | 2009 | 1 | |
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