| Theatro Pyli | Theatro Pyli | Greece, Athens | 1988-01-08 | -- | 1988 | 1 | |
| Theatro Rematias | Theatro Rematias | Greece, Athens | 1987-07-06 | 1987-07-07 | 1987 | 1 | |
| Theatro Rex | Theatro Rex | Greece, Komotini | 1940-02- | -- | 1940 | 2 | |
| Theatro Rex | Theatro Rex | Greece, Athens | 1945-11-07 | 1945-11-14 | 1945 | 1 | |
| Theatro São Pedro | Theatro São Pedro | Brazil, São Paulo, R. Barra Funda, 171 | 2018-10-07 | -- | 2018 | 1 | |
| Theatro Settas "Nikos Papakonstantinou" | Theatro Settas "Nikos Papakonstantinou" | Greece, Setta, Evia, Ano Setta | 2006-08-05 | 2006-08-05 | 2006 | 1 | |
| Theatro Sigchrono Athinas | Theatro Sigchrono Athinas | Greece, Athens, Evmolpidon 39 | 2004-12-25 | 2005-04-24 | 2004 | 1 | |
| Theatro Sporting Club | Theatro Sporting Club | Turkey, Izmir | 1909-03-03 | -- | 1909–1920 | 4 | |
| Theatro sto palio typografeio tou Empros | Theatro sto palio typografeio tou Empros | Greece, Athina, P.C., Palamidou Riga 2 | 1991-12-20 | 1995-04-16 | 1991–1994 | 2 | |
| Theatro Syntagmatos | Theatro Syntagmatos | Turkey, Samsun | 1909-12-15 | -- | 1909 | 1 | |
| Theatro Technis | Theatro Technis | England, London, 26 Crowndale Rd | 2004-10-19 | 2018-12-19 | 2004–2017 | 4 | |
| Theatro Technon | Theatro Technon | Greece, Larisa, Pineiou 9 | 2004-12-17 | 2005-01-30 | 2004 | 1 | |
| Theatro Thessalonikis | Theatro Thessalonikis | Greece, Thessaloniki | 2005-03-11 | 2005-04-24 | 2005 | 1 | |
| Theatro Thision | Theatro Thision | Greece, Athens | 2013-11-21 | 2014-02-07 | 2013 | 1 | |
| Theatro tis Imeras | Theatro tis Imeras | Greece, Athens, 20 Gennimata N. Street | 2006-05-11 | 2006-12- | 2006 | 1 | |
| Theatro tis odou Kefallinias | Theatro tis odou Kefallinias (Θέατρο Οδού Κεφαλληνίας) | Greece, Athina, Kefallinias 16 | 1994-11-04 | 1995-12-10 | 1994 | 1 | |
| Theatro Titania | Theatro Titania | Greece, Ioannina | 1940-04-05 | -- | 1940 | 1 | |
| Theatro To scholeion (Xoros B’) | Theatro To scholeion (Xoros B’) | Greece, Athens | 2008-07-27 | 2008-07-31 | 2008 | 1 | |
| Theatro ton Komodion | Theatro ton Komodion | Greece, Athens | 1894-10-29 | 1894-11-13 | 1894 | 1 | |
| Theatro tou Iliou (Kentriki skini) | Theatro tou Iliou (Kentriki skini) | Greece, Athens, Frynixou Street | 2003-02-28 | 2004-02-01 | 2003 | 2 | |
| Theatro Trianon | Theatro Trianon | Greece, Nafplio, Πλ. Συντάγματος | 2011-11-26 | 2011-11-27 | 2011 | 1 | |
| Theatro Tsocha | Theatro Tsocha | Greece, Pireus | 1898-07-31 | 1898-08-01 | 1898 | 1 | |
| Theatro Tzani Karampini | Theatro Tzani Karampini | Greece, Kalamata | 1912-01-04 | -- | 1912 | 1 | |
| Theatro Tzeni Karezi | Theatro Tzeni Karezi | Greece, Athens | 2008-05-02 | 2008-05-08 | 2008 | 1 | |
| Theatro Variete | Theatro Variete | Greece, Athens | 1895-10-21 | 1901-12-08 | 1895–1901 | 5 | |
| Theatro Viktoria | Theatro Viktoria | Greece, Athens | 1989-04-05 | 1990-12-30 | 1989 | 1 | |
| Theatro Vretania | Theatro Vretania | Greece, Athens | 1943-01-27 | 1943-02-16 | 1943 | 1 | |
| Theatro Zizania | Theatro Zizania | Egypt, Alexandria | 1903-04-06 | -- | 1903 | 1 | |
| Theatron, Kentro Politismou "Ellinikos Kosmos", Aithousa Antigoni | "Theatron", Kentro Politismou "Ellinikos Kosmos", Aithousa Antigoni | Greece, Athens | 2012-06-06 | 2012-07-01 | 2012 | 1 | |
| Théo Théatre | Le Théo Théatre | France, Paris, 20 Rue Théodore Deck | 2007-12-19 | 2008-02-07 | 2007 | 1 | |
| Theodore and Adele Shank Theatre | Theodore and Adele Shank Theatre | United States, San Diego, 9500 Gilman Drive | 2018-06-06 | 2018-06-09 | 2018 | 1 | |
| Theodore L. Hazlett, Jr. Theatre | Theodore L. Hazlett, Jr. Theatre | United States, Pittsburgh, 6 Allegheny Square East | 1984-02-17 | 1984-04-01 | 1984 | 1 | |
| Theresa L. Kaufmann Auditorium | Theresa L. Kaufmann Auditorium | United States, New York, Lexington Avenue | 1948-02-14 | 1949-12-04 | 1948–1949 | 2 | |
| Thesbiteateret | Thesbiteateret | Norway, Tønsberg, Nordlysveien 4 c, 3113 Tønsberg | 1978-03-01 | -- | 1978 | 1 | |
| Thessaloniki | Thessaloniki | Greece, Thessaloniki | 1962-03-15 | 2013-10-12 | 1962–2013 | 2 | |
| Thiasos "Oi theatrinon theates" | Thiasos "Oi theatrinon theates" | Greece, Athens | 2007-02-08 | 2007-05-13 | 2007 | 1 | |
| Thionville | NEST - CDN transfrontalier de Thionville-Grand Est | France, Thionville, 15 Route de Manom | 1991-11-15 | 2018-06-08 | 1991–2018 | 4 | |
| Thionville, Théâtre de | Théâtre de Thionville | France, Thionville, 30 Boulevard Foch | -- | -- | | | |
| Thirteen/WNET New York (USA) | Thirteen/WNET New York (USA) | United States, New York | -- | -- | | | |
| Thisted Teater | Thisted Teater | Denmark, Thisted | 1883-10-12 | -- | 1883–1907 | 2 | |
| Thiva | Thiva | Greece, Thiva | 1981-11-15 | -- | 1981 | 1 | |
| Thomas-Morus-Gymnasium | Thomas-Morus-Gymnasium | Germany, Oelde, Zur Dicken Linde 29 | 1999-01-13 | 1999-01-13 | 1999 | 1 | |
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