| 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 | |
| TITAN Teatergruppe | TITAN Teatergruppe | 2008 | 1 | |
| TITAN Teaterskole | TITAN Teaterskole | 2009 | 1 | |
| Tivoli Teater | Tivoli Teater | 1901 | 1 | |
| TLTA Produktion | TLTA Produktion | 2023 – 2024 | 4 | 1 |
| Tofusha | Tofusha | 1994 | 1 | |
| Tokyo Geijutsuza / Gekijo (Tokyo Art Theatre) | Tokyo Geijutsuza / Gekijo (Tokyo Art Theatre) | 1914 – 1946 | 3 | |
| Tokyo International Players | Tokyo International Players | 2004 | 1 | |
| Tokyo Stage Society | Tokyo Stage Society | 1912 | 1 | |
| Tolstoy State Theatre | Tolstoy State Theatre | | | |
| Tom Løberg | Tom Løberg | 2010 | 1 | |
| Tomskij dramatičeskij teatr imeni Čkalova | Tomskij dramatičeskij teatr imeni Čkalova (Chkalov Tomsk Drama Theatre) | 1957 | 1 | |
| Toneelgroep Amsterdam | Toneelgroep Amsterdam | 1990 – 2021 | 108 | |
| Toneelgroep De Appel | Toneelgroep De Appel | 1973 – 2003 | 5 | |
| Tooneelvereeniging, De | De Tooneelvereeniging | 1889 | 1 | |
| Torinokai | Torinokai | 1983 – 1994 | 3 | |
| Torosha | Torosha | 1918 | 1 | |
| Tourism East Flores Municipal Office | Tourism East Flores Municipal Office | 2019 | 1 | |
| Tournée Gabrieli Zapolskiej | Tournée Gabrieli Zapolskiej | 1887 | 1 | |
| Tournée Harriet Bosse | Tournée Harriet Bosse | 1924 | 2 | |
| Tournée trupy Karola Adwentowicza | Tournée trupy Karola Adwentowicza | 1908 | 31 | |
|
|
