- Uhrichsville
- Uki
- Ukiah
- Ulen
- Ulm
- Ulysses
- Umatilla
- Underhill
- Underwood
- Union
- Union Bridge
- Union City
- Union Gap
- Union Grove
- Union Mills
- Union Pier
- Union Springs
- Uniondale
- Uniontown
- Unionville
- Universal
- Universal City
- University City
- University Heights
- University Park
- University Place
- Upland
- Upper Arlington
- Upper Darby
- Upper Marlboro
- Upper Saddle River
- Upper Saint Clair
- Upper Sandusky
- Upper Swan
- Upton
- Urbana
- Urbandale
- Urbanna
- Usk
- Utica
- Utrecht
- Uxbridge