U
- U.S. Open 9-ball Championship
- U.S. Open Badminton Championship
- U.S. Open Bowling Championship
- U.S. Open Chess Championship
- U.S. Open Crosswords Championship
- U.S. Open Cycling Championship
- U.S. Open Darts Championship
- U.S. Open Golf Championship
- U.S. Open of Surfing
- U.S. Open Polo Championship
- U.S. Open Soccer Championship
- U.S. Open Squash Championship
- U.S. Open Taekwondo Championship
- U.S. Open Tennis Championship
- UFC
- UFC 109
- UID
- Ukrainian Fashion Week
- United Nations Stakes
- United States Census
- UP2012
- US gurudwara shooting
- Uttar Pradesh Assembly Elections