- Claremont
- Coast Guard Island
- Cape Horn
- Camanche North Shore
- Camanche Village
- Carbondale
- Clarsona
- Clinton
- Camp Eighteen
- Cana
- Centerville
- Chapmantown
- Cherokee
- Cohasset
- Craig
- Cresta
- Calaveritas
- Camp Connell
- Camp Pardee
- Canyon View
- Carmen City
- Carson Hill
- Cave City
- Cedar Vista
- Copper Cove Subdivision
- Copper Cove Village
- Cottage Springs
- Camp Klamath
- Castle Rock
- Cone Rock