- Uitenhage
- Ukiah
- Union
- Union Bridge
- Union City
- Union Mills
- Uniondale
- Uniontown
- Universal City
- University City
- University Heights
- University Park
- University Place
- Upland
- Upper Arlington
- Upper Black Eddy
- Upper Darby
- Upper Falls
- Upper Freehold
- Upper Marlboro
- Upper Saddle River
- Upper Saint Clair
- Upper Sandusky
- Upperco
- Upperville
- Urbana
- Urbandale
- Urbanna
- Utica