| Stadium | Location | Capacity | Opened |
|---|---|---|---|
| U.S. Bank Stadium | Minneapolis | 70,000 seats | July 22, 2016 |
| UBS Arena | — | — | November 19, 2021 |
| UCLA Straus Stadium | Los Angeles | 5,800 seats | May 20, 1984 |
| Unieuro Arena | Province of Forlì-Cesena, Forlì, Emilia-Romagna | 5,676 seats | March 29, 1987 |
| Union Base-Ball Grounds | Illinois | — | 1871 |
| United Center | Illinois | 23,500 seats | August 18, 1994 |
| University Hall Turf Field | Virginia | 2,500 seats | — |
| University of Illinois Ice Arena | Champaign | 2,000 seats | 1931 |
| UW–Milwaukee Panther Arena | Milwaukee | 12,700 seats | April 9, 1950 |