- Utopia
- Utopia (historical)
- Umbrella Island
- Umatilla
- Uceta
- Uceta Gardens
- Uceta Heights
- Uceta Pines
- Uleta
- Unity Circle
- University
- University Square
- University Village
- University Woods
- Urania
- Urbanrest
- University West
- Usher
- Underwood Crossing
- Upper Captiva
- Useppa Island
- Urbans Mobile Home Park
- Upper Arsnicker Keys
- Umbrella Key
- Upper Harbor Key
- Upper Matecumbe Key
- Up the Grove Beach
- University Park
- University Village Mobile Home Park
- University Lakes Mobile Home Park