- Uhrichsville
- Ulm's Mobile Home Court I
- Ulm's Mobile Home Court II
- Ulric
- Union
- Union City
- Union Corners
- Union Furnace
- Union Ridge
- Union Station
- Unionport
- Uniontown
- Uniontown
- Unionvale
- Unionville
- Unionville
- Unionville
- Unionville
- Unionville
- Unionville Center
- Uniopolis
- Unity
- Unity
- University Heights
- Uno
- Upland Heights
- Upper Arlington
- Upper Arlington
- Upper Dayton View
- Upper Fivemile