| Ungdomsmötet Amundön | Ungdomsmötet Amundön | Sweden, Göteborg | 1911-07-16 | -- | 1911 | 1 | |
| Ungdomsmötet i Karlskoga | Ungdomsmötet i Karlskoga | Sweden, Karlskoga | 1911-06-25 | -- | 1911 | 1 | |
| Ungdomsmötet i Lidköping | Ungdomsmötet i Lidköping | Sweden, Lidköping | 1911-06-23 | -- | 1911 | 1 | |
| Ungdomsskolen | Ungdomsskolen | Norway, Leikanger, Kyrkjevegen 6 | 1969-10-03 | 1969-10-04 | 1969 | 1 | |
| Unió republicana | Unió republicana | Spain, Barcelona, Gracia | 1908-04-28 | -- | 1908 | 2 | |
| Union Hall, University of Adelaide | Union Hall, University of Adelaide | Australia, Adelaide, North Terrace | 1960-08-31 | 1960-11-26 | 1960 | 2 | |
| Union Theater | Union Theater | United States of America, Madison, 800 Langdon St | 1950-05-02 | -- | 1950 | 1 | |
| Union Theatre | Union Theatre | Australia, Parkville, University of Melbourne, Union House, Ground Floor, Union Rd | 1945-07-02 | -- | 1945–1947 | 2 | |
| Union Theatre | Union Theatre | United States of America, Bakersfield | 1908-06-27 | 1908-06-27 | 1908 | 1 | |
| Union Theatre | Union Theatre | England, London, 204 Union St | 2003-03-25 | 2019-02-02 | 2003–2019 | 2 | |
| Union Theatre | Union Theatre | United States of America, Missoula | 1909-01-14 | 1909-01-14 | 1909 | 1 | |
| Union, Théâtre de l' | Théâtre de l'Union | France, Limoges, 20 Rue des Coopérateurs | 2012-10-22 | 2012-10-23 | 2012 | 1 | |
| Unitarian Assembly Theatre | Unitarian Assembly Theatre | United States of America, Minneapolis | 1928-12-12 | 1928-12-13 | 1928–1934 | 3 | |
| Unitarian Parish House | Unitarian Parish House | United States of America, Anaconda | 1910-05-25 | 1910-05-25 | 1910 | 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 | |
| United States | United States | United States of America, United States | 1911-05-02 | 1952-03-09 | 1911–2017 | 46 | |
| Unity Theatre | Unity Theatre | England, London, Goldington St | 1963-11-29 | 2008-11-01 | 1963–2008 | 2 | |
| 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 | |
| Universidad Nacional Autónoma de México | Universidad Nacional Autónoma de México (UNAM) | Mexico, Ciudad de México, Av Universidad 3000, Copilco Universidad, Coyoacán. | 1976-03-16 | -- | 1976 | 1 | |
| Université Cheikh-Anta-Diop | Université Cheikh-Anta-Diop | Senegal, Dakar | 2021-05-25 | -- | 2021 | 1 | |
| Université Inter-Âges | Université Inter-Âges | France, Versailles, 6 impasse des gendarmes | 2019-06-20 | -- | 2019 | 1 | |
| Université Populaire du Faubourg Saint-Antoine | Université Populaire du Faubourg Saint-Antoine | France, Paris, 157 rue du Faubourg Saint-Antoine | 1908-10-04 | -- | 1908 | 1 | |
| Universitetet i Urbygningen | Universitetet i Urbygningen | Norway, Oslo, Karl Johans gate 47 | 1990-09-07 | 1990-09-14 | 1990–2006 | 3 | |
| Universitetsbiblioteket i Oslo (UiO) | Universitetsbiblioteket i Oslo (UiO) | Norway, Oslo, Moltke Moes vei 39 | 2008-02-29 | -- | 2008 | 1 | |
| University Auditorium | University Auditorium | United States of America, Columbia, Columbia | 1920-04-05 | -- | 1920 | 1 | |
| University Auditorium, Nnamdi Azikiwe University | University Auditorium, Nnamdi Azikiwe University | Nigeria, Awaka | 2002-09-11 | 2002-09-11 | 2002 | 1 | |
| University Of Arkansas Theatre | University Of Arkansas Theatre | United States of America | 2023-02-17 | 2023-02-26 | 2023 | 1 | |
| 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 | |
| University of Dhaka | University of Dhaka | Bangladesh, Dacca, Ramna | -- | -- | | | |
| University of Freiburg Aula | University of Freiburg Aula | Germany, Freiburg | 2002-12-12 | -- | 2002 | 1 | |
| University of Iowa Theatre Department | University of Iowa Theatre Department | United States of America, Iowa City, 200 N Riverside Dr | 2006-09-16 | 2006-09-17 | 2006 | 1 | |
| University of Minnesota | University of Minnesota | United States of America, Morris, University of Minnesota, Morris, East 4th Street, Morris, Minnesota, USA | -- | -- | | | |
| University of Montana | University of Montana | United States of America, Missoula, 32 Campus Drive | 1972-10-21 | 1972-10-24 | 1972 | 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 | |
| University of Sheffield Drama Studio | University of Sheffield Drama Studio | England, Sheffield, Shearwood Rd | 2007-09-24 | 2018-09-22 | 2007–2018 | 3 | |
| 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 of Southern Maine | University of Southern Maine | United States of America, Gorham | 1986-04-11 | 1986-04-12 | 1986 | 1 | |
| University of Texas, The | The University of Texas | United States of America, Austin, 1 University Station | 1911-02-01 | 1911-02-01 | 1911 | 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 of Victoria | University of Victoria | Canada, Victoria, 3800 Finnerty Rd | 2002-03-14 | 2002-03-30 | 2002 | 1 | |
| University of Waterloo | University of Waterloo | Canada, Waterloo, 200 University Ave W | 1963-10-22 | -- | 1963 | 1 | |
| University of Wisconsin | University of Wisconsin | United States of America, Madison | 2006-10-07 | -- | 2006 | 1 | |
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