U
- United Auburn Indian Community of the Auburn Rancheria of California
- United Keetoowah Band of Cherokee Indians in Oklahoma
- Upper Sioux Community, Minnesota
- Upper Skagit Indian Tribe
(previously listed as Upper Skagit Indian Tribe of Washington) - Ute Indian Tribe of the Uintah & Ouray Reservation, Utah
- Ute Mountain Tribe of the Ute Mountain Reservation, Colorado, New Mexico & Utah
- Utu Utu Gwaitu Paiute Tribe of the Benton Paiute Reservation, California
Read more about this topic: Federally Recognized Tribes