- Upper Lehigh
- Upper Middletown
- Upper Mill
- Upper Octoraro
- Upper Peanut
- Upper Pittston
- Upper Providence
- Upper Providence Township
- Upper Reese
- Upper Saint Clair
- Upper Saint Clair
- Upper Strasburg
- Upper Two Lick
- Upper Whyel
- Upsal
- Upsonville
- Upton
- Upton
- Urban
- Urban Acres Trailer Park
- Urey
- Urey Islands
- Uriah
- Ursina
- Uswick
- Utahville
- Utica