| Theatre of Ireland | Theatre of Ireland | 1906 | 1 | |
| Theatre Office Natori, The | The Theatre Office Natori | 1999 – 2012 | 24 | |
| Theatre Vertigo | Theatre Vertigo | 2007 | 1 | |
| Théâtre Vidy-Lausanne | Théâtre Vidy-Lausanne | 1993 – 2014 | 31 | |
| Theatrinon Theatres | Theatrinon Theatres | 2006 – 2007 | 4 | |
| Theatro Circo | Theatro Circo | 2007 – 2008 | 6 | |
| Theatron Odeiou | Theatron Odeiou | 1919 | 3 | |
| Thelma Holt | Thelma Holt | 1994 | 3 | |
| Therese Elfforss' Sällskap | Therese Elfforss' Sällskap | 1876 – 1879 | 9 | |
| Thiaso Xenofon Isaïas | Thiaso Xenofon Isaïas | 1903 | 1 | |
| Thiasos (Konstantinos Vonaseras?) | Thiasos (Konstantinos Vonaseras?) | 1896 | 1 | |
| Thiasos (Olympia Lalaouni-Damaskou?) | Thiasos (Olympia Lalaouni-Damaskou?) | 1907 | 1 | |
| Thiasos (Rozalia Nika?) | Thiasos (Rozalia Nika?) | 1910 | 1 | |
| Thiasos Athanasios Marikos-Emmanouil Kantiotis | Thiasos Athanasios Marikos-Emmanouil Kantiotis | 1916 | 1 | |
| Thiasos Christina Kalogerikou | Thiasos Christina Kalogerikou | 1914 | 1 | |
| Thiasos Christina Kalogerikou-Anthi Miliadou | Thiasos Christina Kalogerikou-Anthi Miliadou | 1916 | 2 | |
| Thiasos Dimitrios Angelakis | Thiasos Dimitrios Angelakis | 1900 – 1901 | 3 | |
| Thiasos Dimosthenis Alexiadis | Thiasos Dimosthenis Alexiadis | 1901 | 1 | |
| Thiasos Eftychios Vonaseras | Thiasos Eftychios Vonaseras | 1894 – 1904 | 5 | |
| Thiasos Ellinikis Komodias Michaïl Iakovidis | Thiasos Ellinikis Komodias Michaïl Iakovidis | 1909 | 2 | |
| Thiasos Evangelia Paraskevopoulou | Thiasos Evangelia Paraskevopoulou | 1898 | 2 | |
| Thiasos Evangelos Pantopoulos | Thiasos Evangelos Pantopoulos | 1903 | 3 | |
| Thiasos Kathreftis | Thiasos Kathreftis | 2006 | 1 | |
| Thiasos Koula Zervou | Thiasos Koula Zervou | 1921 | 1 | |
| Thiasos Kyveli Adrianou | Thiasos Kyveli Adrianou | 1907 – 1928 | 44 | |
| Thiasos Marika Kotopouli | Thiasos Marika Kotopouli | 1918 – 1945 | 6 | |
| Thiasos Michaïl Arniotakis | Thiasos Michaïl Arniotakis | 1899 | 2 | |
| Thiasos Nikolaos Plessas | Thiasos Nikolaos Plessas | 1911 | 4 | |
| Thiasos Nikos Moraïtis | Thiasos Nikos Moraïtis | 1918 | 1 | |
| Thiasos Panos Kalogerikos | Thiasos Panos Kalogerikos | 1910 | 1 | |
| Thiasos Smaragda Isaïa | Thiasos Smaragda Isaïa | 1902 | 1 | |
| Thiasos Thomas Oikonomou | Thiasos Thomas Oikonomou | 1906 – 1924 | 26 | |
| Thiasos Thomas Oikonomou-Loukia Tiveri | Thiasos Thomas Oikonomou-Loukia Tiveri | 1909 | 1 | |
| Thiasos Tilemachos Lepeniotis | Thiasos Tilemachos Lepeniotis | 1914 | 1 | |
| Thiasos tis Ellinikis Komodias – Eftychios Vonaseras-Evangel | Thiasos tis Ellinikis Komodias – Eftychios Vonaseras-Evangel | 1898 | 1 | |
| Thomas Cortes' Skuespillerselskab | Thomas Cortes' Skuespillerselskab | 1857 – 1878 | 25 | |
| Thorvald Koefods Selskab | Thorvald Koefods Selskab | 1900 | 1 | |
| Thorvald Larsens Tourné | Thorvald Larsens Tourné | 1926 | 4 | |
| Three P's Society of Tufts College, The | The Three P's Society of Tufts College | 1913 | 1 | |
| Tilla Durieux mit Ensemble des Deutschen Volkstheaters Wien | Tilla Durieux mit Ensemble des Deutschen Volkstheaters Wien | 1933 | 2 | |
| Tin Alley Players | Tin Alley Players | 1945 | 1 | |
| Tisch School Of The Arts | Tisch School Of The Arts | 2005 – 2007 | 2 | |
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