Cities - U
- U.S. Air Force Academy [2]
- Uhland [11]
- Uhrichsville [1]
- Ukiah [13]
- Ulysses [4]
- Umatilla [1]
- Umbarger [5]
- Umpqua [1]
- Underhill [2]
- Underwood [1]
- Unicoi [2]
- Union [21]
- Union City [33]
- Union Gap [1]
- Union Grove [2]
- Uniondale [40]
- Uniontown [14]
- Unionville [1]
- Universal City [652]
- University City [8]
- University Park [2]
- University Place [7]
- Unterägeri [1]
- Upland [25]
- Upper Arlington [6]
- Upper Darby [6]
- Upper Freehold [1]
- Upper Marlboro [13]
- Upper Saddle River [12]
- Upper Sandusky [2]
- Urbana [21]
- Urbandale [24]
- Utica [11]
- Utopia [72]
- Uvalde [543]
- Uxbridge [7]