- Upper Holleman Island (historical)
- Una
- Unaka Springs
- Underwood
- Underwood
- Unicoi
- Union
- Union
- Union
- Union
- Union
- Union
- Union Central
- Union City
- Union Cross
- Union Grove
- Union Grove
- Union Grove
- Union Grove
- Union Grove
- Union Grove
- Union Grove
- Union Heights
- Union Hill
- Union Hill
- Union Hill
- Union Hill
- Union Hill
- Union Hill
- Union Ridge