| Union, Théâtre de l' | Théâtre de l'Union | France, Limoges, 20 Rue des Coopérateurs | 2012-10-22 | 2012-10-23 | 2012 | 1 | |
| University Theatre | University Theatre, Department of Theatre and Dance | United States, Boulder, 261 UCB | 1947-01-30 | 2017-11-12 | 1947–2017 | 4 | |
| Ulmer Theater | Ulmer Theater | Germany, Ulm, Herb-v-Karajan-Platz 1 | 1983-06-28 | 2006-07-13 | 1983–2006 | 7 | |
| University Playhouse, Arizona State University | University Playhouse, Arizona State University | United States, Tempe, 1001 S Forest Mall | 1963-02-13 | 1963-02-22 | 1963 | 1 | |
| Utställningen i Arvika | Utställningen i Arvika | Sweden, Arvika | 1911-06-27 | 1911-06-28 | 1911 | 1 | |
| University Playhouse, Kansas City | University Playhouse, Kansas City | United States, Kansas City, Rockhill Road | 1974-08-08 | -- | 1974 | 1 | |
| Ungdomsskolen | Ungdomsskolen | Norway, Leikanger, Kyrkjevegen 6 | 1969-10-03 | 1969-10-04 | 1969 | 1 | |
| Ulsteinvik | Ulsteinvik | Norway, Ulsteinvik | 1966-04-28 | 1995-11-16 | 1966–1997 | 4 | |
| Union Theater | Union Theater | United States, Madison, 800 Langdon St | 1950-05-02 | -- | 1950 | 1 | |
| Union Theatre | Union Theatre | England, London, 204 Union St | 2003-03-25 | 2019-02-02 | 2003–2019 | 2 | |
| Urquiza | Urquiza | Uruguay, Montevideo | 1907-10-10 | -- | 1907 | 1 | |
| Üçüncü Tiyatro | Üçüncü Tiyatro (Uucncu Tiyatro) | Turkey, ULUS / ANKARA, İstiklal Cad. Çirmen Sokak Vakıf Apt. No:8 | -- | -- | | | |
| Umewaka Nohgaku Gakuin Kaikan Theater | Umewaka Nohgaku Gakuin Kaikan Theater | Japan, Tokyo, 2-6-14 Higashi-nakano, Nakano-ku | 2005-08-09 | 2008-05-31 | 2005–2013 | 4 | |
| Universidad del Claustro de Sor Juana | Universidad del Claustro de Sor Juana | Mexico, Mexico City, José María Izazaga 92, Centro Histórico, Cuauhtémoc | 2006-04-09 | 2006-08-30 | 2006 | 1 | |
| Ueneshallen | Ueneshallen | Norway, Flekkefjord, Tunveien 18 | 1997-09-27 | 1997-10-08 | 1997 | 2 | |
| Union Theatre | Union Theatre | United States, Bakersfield | 1908-06-27 | 1908-06-27 | 1908 | 1 | |
| Ufimskij ruskii dramatičeskij teatr | Ufimskij ruskii dramatičeskij teatr | Russia, Ufa | 1964-11- | -- | 1964 | 1 | |
| University of Montana | University of Montana | United States, Missoula, 32 Campus Drive | 1972-10-21 | 1972-10-24 | 1972 | 1 | |
| Uppsala Stadsteater | Uppsala Stadsteater | Sweden, Uppsala, Kungsgatan 53 | 1955-03-18 | 2013-05-08 | 1955–2013 | 4 | |
| University of Utah | University of Utah | United States, Salt Lake City, Presidents Circle | 1909-11-23 | 1909-11-23 | 1909 | 1 | |
| University of Wisconsin | University of Wisconsin | United States, Madison | 2006-10-07 | -- | 2006 | 1 | |
| Užhorod | Užhorod | Ukraine, Užhorod | 1911-10-21 | 1911-11-04 | 1911–1941 | 7 | |
| Unity Theatre | Unity Theatre | England, London, Goldington St | 1963-11-29 | 2008-11-01 | 1963–2008 | 2 | |
| University Theatre | University Theatre | United States, New Haven, 222 York Street | 2014-02-01 | 2014-02-07 | 2014 | 1 | |
| Ushigome, Koto Engekikan Hall | Ushigome, Koto Engekikan Hall | Japan, Tokyo | 1912-01-30 | 1912-01-31 | 1912 | 1 | |
| University Workshop Theatre, Louisiana State University | University Workshop Theatre, Louisiana State University | United States, Baton Rouge | 1947-04-24 | 1947-04-26 | 1947 | 1 | |
| Uttam Manch | Uttam Manch | India, Kolkata, Manohar Pukur Road, Hazra | 2016-- | -- | 2016 | 1 | |
| University Theatre | University Theatre | United States, Iowa City, University of Iowa | 1937-02-22 | 1965-04-03 | 1937–1965 | 3 | |
| Utiel | Utiel | Spain, Utiel | 2010-09-10 | -- | 2010 | 1 | |
| University Theatre | University Theatre | United States, Sacramento, 6000 J Street Shasta Hall | 2004-11-05 | 2004-11-14 | 2004 | 1 | |
| Ulefoss | Ulefoss | Norway, Ulefoss | 1991-09-30 | -- | 1991 | 1 | |
| Umeås Theater | Umeås Theater | Sweden, Umeå | 1885-06-12 | -- | 1885 | 1 | |
| Undermain Theatre | Undermain Theatre | United States, Dallas, 3200 Main St | 2018-11-07 | 2021-06-13 | 2018–2021 | 2 | |
| University of Calgary - Department of Drama | University of Calgary, Department of Drama | Canada, Calgary, Craigie Hall 2500 University Drive NW | 1975-02-26 | 1978-03-18 | 1975–1978 | 2 | |
| USF Verftet | USF Verftet | Norway, Bergen, Georgernes Verft 12 | 1985-03-28 | 2011-07-09 | 1985–2011 | 8 | |
| University Auditorium, Nnamdi Azikiwe University | University Auditorium, Nnamdi Azikiwe University | Nigeria, Awaka | 2002-09-11 | 2002-09-11 | 2002 | 1 | |
| Ullensaker | Ullensaker | Norway, Ullensaker | 2005-04-06 | -- | 2005 | 1 | |
| Usine, Théâtre de l' | Théâtre de l'Usine | France, Éragny-sur-Oise, 33 Chemin d'Andrésy | 2017-01-20 | 2017-01-22 | 2017 | 1 | |
| Uddevalla | Uddevalla | Sweden, Uddevalla | 1991-04-02 | 1991-04-03 | 1991 | 1 | |
| Umělecká beseda na Malé straně | Umělecká beseda na Malé straně | Czech Republic, Prague | 1936-03-11 | -- | 1936 | 1 | |
| UIC Theatre | UIC Theatre | United States, Chicago, 1044 W Harrison St | 2010-10-01 | 2010-10-10 | 2010 | 1 | |
| Ungdomsmötet i Karlskoga | Ungdomsmötet i Karlskoga | Sweden, Karlskoga | 1911-06-25 | -- | 1911 | 1 | |
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