| Throndhjems Theater | Throndhjems Theater | Norway, Trondheim, Prinsens Gate 20 | 1861-11-17 | 1863-11-04 | 1861–1863 | 2 | 1 |
| Teatro Massaia Borghiere | Teatro Massaia Borghiere | Italy, Torino | 1996-02-16 | 1996-02-19 | 1996 | 1 | |
| Teatro 3 de febreo | Teatro 3 de febrero | Bolivia, Sucre, Arenales 8 | 2004-09- | -- | 2004 | 1 | |
| Teatro Sperimentale | Teatro Sperimentale | Italy, Pesaro, Via Gioacchino Rossini | 1975-02-10 | 2005-02-06 | 1975–2005 | 2 | |
| Theater in Dornbirn | Theater in Dornbirn | Austria, Dornbirn | 1908-05-21 | -- | 1908–1914 | 5 | |
| Teatre del Centre Parroquial | Teatre del Centre Parroquial | Spain, Tarragona, Passatge Maragall, 3 L'Arboç, 43720 | 2025-02-02 | -- | 2025 | 1 | |
| Târgu Mureș | Târgu Mureș | Romania, Târgu Mureș | 1900-07-10 | -- | 1900–1938 | 4 | |
| Théâtre Libre | Théâtre Libre | France, Paris | 1890-05-30 | -- | 1890–1891 | 2 | |
| Teatr Miejski | Teatr Miejski | Poland, Toruń, Plac Teatralny 1, | 1922-10-10 | -- | 1922–1923 | 2 | |
| Teatro Ivelise | Teatro Ivelise | Italy, Roma, Via Capo d'Africa, 8/12, 00184 | 2022-05-07 | 2022-05-08 | 2022 | 1 | |
| Theatre Royal | Theatre Royal | England, Bristol, King Street | 1943-06-19 | -- | 1943–1963 | 3 | |
| The Greyhound Theatre | The Greyhound Theatre | England, Croydon, London | 1931-04-16 | -- | 1931 | 2 | |
| The Broadwater | The Broadwater, Main stage | United States of America | 2023-06-08 | 2023-06-25 | 2023 | 1 | |
| Trinity Square Repertory Company | Trinity Square Repertory Company | United States of America, Providence, 201 Washington Street | 1968-03-21 | 1984-01-01 | 1968–1983 | 3 | |
| The Magenta Giraffe Theatre Company | The Magenta Giraffe Theatre Company | United States of America, Detroit, 1301 W Lafayette Blvd | 2011-09-16 | 2011-10-08 | 2011 | 1 | |
| TU-Nantes | TU-Nantes | France, Nantes, Chemin de la Censive du Tertre | 2012-02-28 | 2018-02-23 | 2012–2018 | 2 | |
| Teatersalen | Teatersalen | Norway, Båtsfjord, Båtsfjord | -- | -- | | | |
| Teatro Municipal de Portimão | Teatro Municipal de Portimão | Portugal, Portimão, Largo 1º de Dezembro 34 | 2009-09-18 | 2009-09-19 | 2009 | 1 | |
| The Kramar Grand | The Kramar Grand | United States of America, Elwood | 1907-09-20 | 1907-09-20 | 1907 | 1 | |
| Theatersaal des Etablissements Tivoli | Theatersaal des Etablissements Tivoli | Germany, Weimar | 1903-11-25 | -- | 1903 | 2 | |
| Teatr Zimowy N. Golińskiego | Teatr Zimowy N. Golińskiego | Poland, Kalisz | 1882-11-23 | -- | 1882–1884 | 2 | |
| TeaterHUSET | TeaterHUSET | Denmark, Copenhagen, Magstræde 14 | 2006-10-12 | 2006-10-15 | 2006 | 1 | |
| Théâtre de l’Opsis, Le | Le Théâtre de l’Opsis | Canada, Montréal, 1600 DE LORIMIER AVE | 2017-01-30 | 2017-02-19 | 2017 | 1 | |
| Teatteri Ulpu | Teatteri Ulpu | Finland, Ulvila, Rauhantie 6 | 2005-04-09 | 2005-04-25 | 2005 | 1 | |
| Teatro del Parco | Teatro del Parco | Italy, Mestre, Venice, Via Gori, 8 | 2005-03-16 | 2005-03-17 | 2005 | 1 | |
| Terschelling | Terschelling | Netherlands, Terschelling, Friesland | 1999-06-10 | 1999-06-19 | 1999 | 1 | |
| Teatro Municipal Sá de Miranda | Teatro Municipal Sá de Miranda | Portugal, Viana do Castelo, R. de Sá de Miranda | 1997-11-07 | 1998-01-25 | 1997 | 2 | |
| Târgu Ocna | Târgu Ocna | Romania, Târgu Ocna | -- | -- | | | |
| Topoľčany | Topoľčany | Slovak Republic, Topoľčany | 1912-04-25 | -- | 1912 | 1 | |
| Theater Wit | Theater Wit | United States of America, Chicago, 1229 W Belmont Ave | 2011-02-25 | 2026-03-05 | 2011–2026 | 2 | |
| Teatr Nowy | Teatr Nowy | Poland, Zabrze, Plac Teatralny 1 | 1979-06-17 | -- | 1979 | 1 | |
| Teatro Comunale Pedrazzoli | Teatro Comunale Pedrazzoli | Italy, Fabbrico, Via Roma, 64/B, 42042 | 2023-04-15 | -- | 2023 | 1 | |
| Theater der Hansestadt Stralsund | Theater der Hansestadt Stralsund | Germany, Stralsund, Olof-Palme-Platz 6 | 1991-05-25 | -- | 1991–2005 | 3 | |
| Teaterloftet | Teaterloftet | Norway, Trondheim | 1983-01-07 | -- | 1983–1992 | 4 | |
| Teatre Municipal de Palafrugell | Teatre Municipal de Palafrugell | Spain, Palafrugell, Carrer de Santa Margarida, 1 | 2008-09-05 | -- | 2008 | 1 | |
| Teatro Comunale Niccolini | Teatro Comunale Niccolini | Italy, Via Roma, 50026 San Casciano in Val di Pesa | 2024-03-07 | 2024-03-07 | 2024 | 1 | |
| Theatre de la Tempete | Théâtre de la Tempête | France, Paris, route du Champ de manoeuvre | 1972-05-31 | 2024-03-31 | 1972–2024 | 4 | |
| Teatrul Tineretului Piatra-Neamt | Teatrul Tineretului Piatra-Neamt | Romania, Piatra Neamț, Piața Ștefan cel Mare 1 | 1966-01-30 | 2025-05-04 | 1966–2025 | 4 | |
| Theatret i Moss | Theatret i Moss | Norway, Moss | 1871-09-28 | -- | 1871–1907 | 4 | |
| Theatro Nea Skini | Theatro Nea Skini (New Stage) | Greece, Thessaloniki | 1918-06-24 | -- | 1918 | 1 | |
| Thionville | NEST - CDN transfrontalier de Thionville-Grand Est | France, Thionville, 15 Route de Manom | 1991-11-15 | 2025-10-02 | 1991–2025 | 5 | |
| Teatro Principal de San Sebastián | Teatro Principal de San Sebastián | Spain, Donostia-San Sebastian, Calle Mayor, 3, | 1965-04-25 | -- | 1965 | 1 | |
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