| Tolstoy State Theatre | Tolstoy State Theatre | | | |
| Teatr Wielki | Teatr Wielki | | | |
| Theater E | Theater E | 1994 | 1 | |
| Teatro Lirico di Cagliari | Teatro Lirico di Cagliari | 2024 | 1 | 1 |
| Teatrino dei Fondi | Teatrino dei Fondi | 2019 | 1 | 1 |
| Teatr Dom rabočih | Teatr Dom rabočih | 1918 | 1 | |
| Tom Løberg | Tom Løberg | 2010 | 1 | |
| Thiasos Nikos Moraïtis | Thiasos Nikos Moraïtis | 1918 | 1 | |
| Trupa Eugeniusza Majdrowicza | Trupa Eugeniusza Majdrowicza | 1904 | 1 | |
| Teatr dramy Orel | Teatr dramy Orel | 1944 | 1 | |
| Teatre Bis | Teatre Bis | 1997 | 1 | |
| Thiasos Panos Kalogerikos | Thiasos Panos Kalogerikos | 1910 | 1 | |
| Teatro Comunale Niccolini | Teatro Comunale Niccolini | 2024 | 1 | |
| Teatr Miejski | Teatr Miejski | 1911 | 1 | |
| Teaterfestivalen på Stiklestad | Teaterfestivalen på Stiklestad | 2010 | 1 | |
| Teatro Hamlet | Teatro Hamlet | 2015 | 1 | 1 |
| Thiasos Athanasios Marikos-Emmanouil Kantiotis | Thiasos Athanasios Marikos-Emmanouil Kantiotis | 1916 | 1 | |
| Teatro Astra | Teatro Astra | 2024 | 1 | |
| Teatr i Sąd | Teatr i Sąd | 1914 | 1 | |
| Théâtre de Liège | Théâtre de Liège | 2024 | 1 | |
| Temporada Alta | Temporada Alta | 2006 | 1 | |
| Tampere Theatre Festival | Tampere Theatre Festival | 2009 | 1 | |
| Teatr Ziemi Pomorskiej | Teatr Ziemi Pomorskiej | 1955 | 1 | |
| Thiasos Tilemachos Lepeniotis | Thiasos Tilemachos Lepeniotis | 1914 | 1 | |
| Teatr Fantazja | Teatr Fantazja | 1903 | 1 | |
| Theatre Arts Guild | Theatre Arts Guild | 2025 | 1 | |
| Tooneelvereeniging, De | De Tooneelvereeniging | 1889 | 1 | |
| Teatar «Salsa i smjah» | Teatar «Salsa i smjah» | 1924 | 1 | |
| Theater Department of Sangmyung University's College of Arts | Theater Department of Sangmyung University's College of Arts | 2023 | 1 | |
| The Embassy of the Republic of Bulgaria in the Republic of Slovenia | The Embassy of the Republic of Bulgaria in the Republic of Slovenia | 2024 | 1 | |
| Talawa Theatre Company | Talawa Theatre Company | 1996 | 1 | |
| Three P's Society of Tufts College, The | The Three P's Society of Tufts College | 1913 | 1 | |
| Teatro Randagio | Teatro Randagio | 2024 | 1 | 1 |
| Thiasos Koula Zervou | Thiasos Koula Zervou | 1921 | 1 | |
| Tivoli Teater | Tivoli Teater | 1901 | 1 | |
| Teatr Letni w Ogrodzie Bernardyńskim | Teatr Letni w Ogrodzie Bernardyńskim | 1907 | 1 | |
| Teatre d’Art | Teatre d’Art | 1922 | 1 | |
| Theatre Couture | Theatre Couture | 2000 | 1 | |
| Teatr Łódzki | Teatr Łódzki | 1906 | 1 | |
| Transvaalse Raad vir die Uitvoerende Kunste | Transvaalse Raad vir die Uitvoerende Kunste | 1985 | 1 | |
| Teatralnyj Osobnâkʺ | Teatralnyj Osobnâkʺ | 2009 | 1 | |
| Tyrili Teatret | Tyrili Teatret | 1991 | 1 | |
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