- Canyon City
- Casa de Oro-Mount Helix
- Chappo
- Citrus Gardens Mobile Home Park
- Clover Flat
- Coronado Cays
- County Center
- Crown Island
- Calla
- Carbona
- Carnazzani Island (historical)
- Carrolton
- Cherokee
- Cochrane
- Collegeville
- Collierville
- Cometa
- California Valley
- Callender
- Cambria Pines
- Cambria Rock
- Capital Hill
- Chorro
- Cienega Seabreeze Mobile Home Park
- Cuesta-by-the-Sea
- Cuna Vista Mobile Home Park
- Cushing
- Cachuma Village
- Can Rock
- Capitan