| Union, Théâtre de l' | Théâtre de l'Union | France, Limoges, 20 Rue des Coopérateurs | 2012-10-22 | 2012-10-23 | 2012 | 1 | |
| University of Minnesota | University of Minnesota | United States of America, Morris, University of Minnesota, Morris, East 4th Street, Morris, Minnesota, USA | -- | -- | | | |
| Urquiza | Urquiza | Uruguay, Montevideo | 1907-10-10 | -- | 1907 | 1 | |
| Upstairs at the Gatehouse | Upstairs at the Gatehouse | England, London, Highgate Village | 2015-10-13 | 2015-10-17 | 2015 | 1 | |
| Urania National Film Theatre | Urania National Film Theatre | Hungary, Budapest, Rakoczi ut. 21 | 2018-01-23 | 2018-01-23 | 2018 | 1 | |
| Umewaka nōgaku gakuin kaikan | Umewaka nōgaku gakuin kaikan (Umewaka Nohgaku Gakuin Kaikan Theater) | Japan, Tokyo, 2-6-14 Higashi-nakano, Nakano-ku | 2005-08-09 | 2008-05-31 | 2005–2013 | 4 | |
| UCSB Main Theatre | UCSB Main Theatre | United States of America, Santa Barbara | 1984-07-19 | 1984-07-28 | 1984 | 1 | |
| Ueneshallen | Ueneshallen | Norway, Flekkefjord, Tunveien 18 | 1997-09-27 | 1997-10-08 | 1997 | 2 | |
| University of Sheffield Drama Studio | University of Sheffield Drama Studio | England, Sheffield, Shearwood Rd | 2007-09-24 | 2018-09-22 | 2007–2018 | 3 | |
| Union Theatre | Union Theatre | United States of America, Bakersfield | 1908-06-27 | 1908-06-27 | 1908 | 1 | |
| Uppsala Stadsteater | Uppsala Stadsteater | Sweden, Uppsala, Kungsgatan 53 | 1955-03-18 | 2013-05-08 | 1955–2013 | 4 | |
| Újpest | Újpest | Hungary, Budapest, Újpest | 1912-11-01 | -- | 1912–1913 | 2 | |
| University of Wisconsin | University of Wisconsin | United States of America, Madison | 2006-10-07 | -- | 2006 | 1 | |
| Unitarian Universalist Church of Raleigh | Unitarian Universalist Church of Raleigh | United States of America, Raleigh, 3313 Wade Ave | 2013-04-12 | 2013-04-13 | 2013 | 1 | |
| Ufimskij russkij dramatičeskij teatr | Ufimskij russkij dramatičeskij teatr (Ufa Russian Dramatic Theatre) | Russia, Ufa, Ulitsa Zaki Validi, 34 | 1964-11- | -- | 1964 | 1 | |
| Unity Theatre | Unity Theatre | England, London, Goldington St | 1963-11-29 | 2008-11-01 | 1963–2008 | 2 | |
| University of Freiburg Aula | University of Freiburg Aula | Germany, Freiburg | 2002-12-12 | -- | 2002 | 1 | |
| Undercoft | The Undercroft | England, Peterborough | 2023-03-28 | 2023-04-01 | 2023 | 1 | |
| Utiel | Utiel | Spain, Utiel | 2010-09-10 | -- | 2010 | 1 | |
| Utansjö | Utansjö | Sweden, Utansjö | 1989-10-01 | 1989-10-01 | 1989 | 1 | |
| Uusi Teatteri | Uusi Teatteri | Sweden, Stockholm, Västmannagatan 56 | 1898-- | -- | 1898–1916 | 2 | |
| University Theatre at UGA | University Theatre at UGA | United States of America, Athens, Corner of Lumpkin and Baldwin | 1970-11-18 | 1970-11-21 | 1970 | 1 | |
| Ulefoss | Ulefoss | Norway, Ulefoss | 1991-09-30 | -- | 1991 | 1 | |
| University of Wisconsin - Green Bay | University of Wisconsin - Green Bay | United States of America, Green Bay, 2420 Nicolet Dr | 2008-02-29 | 2008-03-07 | 2008 | 1 | |
| Umeås Theater | Umeås Theater | Sweden, Umeå | 1885-06-12 | -- | 1885 | 1 | |
| USF Verftet | USF Verftet | Norway, Bergen, Georgernes Verft 12 | 1985-03-28 | 2011-07-09 | 1985–2011 | 8 | |
| University Theatre | University Theatre, Department of Theatre and Dance | United States of America, Boulder, 261 UCB | 1947-01-30 | 2017-11-12 | 1947–2017 | 4 | |
| Ullensaker | Ullensaker | Norway, Ullensaker | 2005-04-06 | -- | 2005 | 1 | |
| University Playhouse, Arizona State University | University Playhouse, Arizona State University | United States of America, Tempe, 1001 S Forest Mall | 1963-02-13 | 1963-02-22 | 1963 | 1 | |
| Union Theater | Union Theater | United States of America, Madison, 800 Langdon St | 1950-05-02 | -- | 1950 | 1 | |
| Undermain Theatre | Undermain Theatre | United States of America, Dallas, 3200 Main St | 2018-11-07 | 2021-06-13 | 2018–2021 | 2 | |
| Umělecká beseda na Malé straně | Umělecká beseda na Malé straně | Czech Republic, Prague | 1936-03-11 | -- | 1936 | 1 | |
| Ungdomsskolen | Ungdomsskolen | Norway, Leikanger, Kyrkjevegen 6 | 1969-10-03 | 1969-10-04 | 1969 | 1 | |
| Ungdomsmötet i Karlskoga | Ungdomsmötet i Karlskoga | Sweden, Karlskoga | 1911-06-25 | -- | 1911 | 1 | |
| Umeå | Umeå | Sweden, Umeå | 1990-10-26 | 1990-10-27 | 1990 | 1 | |
| Union Theatre | Union Theatre | England, London, 204 Union St | 2003-03-25 | 2019-02-02 | 2003–2019 | 2 | |
| University Theatre, University of Calgary | The University Theatre, University of Calgary | Canada, Calgary | 1970-02-11 | 1970-02-15 | 1970 | 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 | |
| Ussel - Château de la Diège | Ussel - Château de la Diège | France | 2023-07-30 | 2023-07-21 | 2023 | 1 | |
| Uleåborg | Uleåborg | Finland, Uleåborg | 1897-03-05 | -- | 1897 | 1 | |
| 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 | |
| University of Southern Maine | University of Southern Maine | United States of America, Gorham | 1986-04-11 | 1986-04-12 | 1986 | 1 | |
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