- Undercliff
- Unity
- Unity Junction
- Universal
- Unionville
- Uhdey
- Unionville
- Urban Acres Trailer Park
- Upper Reese
- Uhlerstown
- Unionville
- Upper Black Eddy
- Upper Emilie
- Unionville
- Upper Dutchtown
- Union Hill
- Unionville
- University Park
- Upper Octoraro
- Upper Hillville
- Utahville
- Upper Mill
- Uriah
- Union Deposit
- Upper Providence
- Upton
- Upper Middletown
- Upper Peanut
- Union City
- Unionville