| 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 | |
| University of South Florida | University of South Florida | United States of America, Tampa, 3837 USF Holly Drive | 2018-01-11 | 2018-01-28 | 2018 | 1 | |
| University Theatre, Indiana University | University Theatre, Indiana University | United States of America, Bloomington, 275 North Jordan Avenue | 1963-11-04 | 2019-11-17 | 1963–2019 | 5 | |
| Újpest | Újpest | Hungary, Budapest, Újpest | 1912-11-01 | -- | 1912–1913 | 2 | |
| Ulvik | Ulvik | Norway, Ulvik | 1951-04-28 | -- | 1951 | 1 | |
| University of Freiburg Aula | University of Freiburg Aula | Germany, Freiburg | 2002-12-12 | -- | 2002 | 1 | |
| Union Theatre | Union Theatre | United States of America, Missoula | 1909-01-14 | 1909-01-14 | 1909 | 1 | |
| Université Inter-Âges | Université Inter-Âges | France, Versailles, 6 impasse des gendarmes | 2019-06-20 | -- | 2019 | 1 | |
| Ulefoss | Ulefoss | Norway, Ulefoss | 1991-09-30 | -- | 1991 | 1 | |
| Utansjö | Utansjö | Sweden, Utansjö | 1989-10-01 | 1989-10-01 | 1989 | 1 | |
| University Of Arkansas Theatre | University Of Arkansas Theatre | United States of America | 2023-02-17 | 2023-02-26 | 2023 | 1 | |
| Ustinov Studio | Ustinov Studio | England, Bath, Sawclose, (Behind the Theatre Royal) | 1999-07-01 | 2025-08-23 | 1999–2025 | 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 | |
| Ullensaker | Ullensaker | Norway, Ullensaker | 2005-04-06 | -- | 2005 | 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 | |
| Uttam Manch | Uttam Manch | India, Kolkata, Manohar Pukur Road, Hazra | 2016-- | -- | 2016 | 1 | |
| Union Opera House | Union Opera House | United States of America, Missoula | 1899-04-27 | -- | 1899 | 1 | |
| University of Dhaka | University of Dhaka | Bangladesh, Dacca, Ramna | -- | -- | | | |
| 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 | |
| Ungdomsmötet i Karlskoga | Ungdomsmötet i Karlskoga | Sweden, Karlskoga | 1911-06-25 | -- | 1911 | 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 | |
| Ungdomsskolen | Ungdomsskolen | Norway, Leikanger, Kyrkjevegen 6 | 1969-10-03 | 1969-10-04 | 1969 | 1 | |
| University Theatre, University of Calgary | The University Theatre, University of Calgary | Canada, Calgary | 1970-02-11 | 1970-02-15 | 1970 | 1 | |
| Union Theater | Union Theater | United States of America, Madison, 800 Langdon St | 1950-05-02 | -- | 1950 | 1 | |
| Utica | Utica | United States of America, Utica | 1903-10-08 | 1903-10-08 | 1903 | 1 | |
| Ushigome kaikan | Ushigome kaikan (Ushigome Kaikan Hall) | Japan, Tokyo | 1924-02-07 | 1924-02-14 | 1924 | 1 | |
| Uleåborg | Uleåborg | Finland, Uleåborg | 1897-03-05 | -- | 1897 | 1 | |
| Union Theatre | Union Theatre | England, London, 204 Union St | 2003-03-25 | 2019-02-02 | 2003–2019 | 2 | |
| Ufa-Theater Friedrichstrasse | Ufa-Theater Friedrichstrasse | Germany, Berlin, Friedrichstrasse 180 | 1935-12-21 | -- | 1935 | 1 | |
| Union, Théâtre de l' | Théâtre de l'Union | France, Limoges, 20 Rue des Coopérateurs | 2012-10-22 | 2012-10-23 | 2012 | 1 | |
| Ungdommens hus | Ungdommens hus | Norway, Tromsø | 1994-03-23 | -- | 1994 | 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 Minnesota | University of Minnesota | United States of America, Morris, University of Minnesota, Morris, East 4th Street, Morris, Minnesota, USA | -- | -- | | | |
| University Theatre, University of Arizona | University Theatre, University of Arizona (University Theatre) | United States of America, Tucson | 1963-04-30 | 1963-05-04 | 1963 | 1 | |
| University of Montana | University of Montana | United States of America, Missoula, 32 Campus Drive | 1972-10-21 | 1972-10-24 | 1972 | 1 | |
| Ulefoss skole | Ulefoss skole | Norway, Ulefoss, Nome | 2006-09-21 | -- | 2006 | 1 | |
| University of Utah | University of Utah | United States of America, Salt Lake City, Presidents Circle | 1909-11-23 | 1909-11-23 | 1909 | 1 | |
| University Theatre | University Theatre | United States of America, New Haven, 222 York Street | 2014-02-01 | 2022-10-28 | 2014–2022 | 2 | |
| Urania National Film Theatre | Urania National Film Theatre | Hungary, Budapest, Rakoczi ut. 21 | 2018-01-23 | 2018-01-23 | 2018 | 1 | |
| University of North Carolina | University of North Carolina | United States of America, Chapel Hill, 209 South Road | 1920-11-20 | 1921-11-19 | 1920–1921 | 2 | |
| Užhorod | Užhorod | Ukraine, Užhorod | 1911-10-21 | 1911-11-04 | 1911–1941 | 7 | |
| Ungdomsmötet Amundön | Ungdomsmötet Amundön | Sweden, Göteborg | 1911-07-16 | -- | 1911 | 1 | |
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