- Cascade Sun Mobile Home Estates
- Cascadel Woods
- Casey Corner
- Casitas Mobile Home Park
- Casitas Springs
- Casket Rock
- Casmalia
- Caspar
- Cassel
- Castaic
- Castaic Junction
- Castella
- Castle Crag
- Castle Gardens
- Castle Park
- Castle Rock
- Castle Rock
- Castle Rock
- Castle Rock
- Castle Rock Springs
- Castro City
- Caswell
- Cat Rock
- Catheys Valley
- Catlett
- Cave City
- Cavin
- Cayton
- Cazadero
- Cecile