- Ulmstead Acres
- Ulmstead Cove
- Ulmstead Estates
- Ulmstead Gardens
- Ulmstead Point
- Urbanwood
- Union Valley
- Union Corner
- Union Corners
- Union Hills
- Union Mills
- Uniontown
- Upper Hooper Island
- Unionville
- Urbana
- Urbana Overlook
- Utica
- Utica Mills Estates
- Upper Crest Estates
- Urieville
- Unity
- Upper Seneca Crest
- Unicorn
- Unicorn Crossing
- Unicorn Manor
- Upper Jutland
- Upper Hill
- Upper Ferry Acres
- Upper Ferry Estates
- Unionville