Towns
| State | City/Town | Town Title |
|---|---|---|
| California | Cantil | Cantil, CA |
| California | Cantua Creek | Cantua Creek, CA |
| California | Canyon | Canyon, CA |
| California | Canyon Country | Canyon Country, CA |
| California | Canyon Dam | Canyon Dam, CA |
| California | Capay | Capay, CA |
| California | Capistrano Beach | Capistrano Beach, CA |
| California | Capitola | Capitola, CA |
| California | Cardiff By The Sea | Cardiff By The Sea, CA |
| California | Carlotta | Carlotta, CA |
| California | Carlsbad | Carlsbad, CA |
| California | Carmel | Carmel, CA |
| California | Carmel By The Sea | Carmel By The Sea, CA |
| California | Carmel Valley | Carmel Valley, CA |
| California | Carmichael | Carmichael, CA |
| California | Carnelian Bay | Carnelian Bay, CA |
| California | Carpinteria | Carpinteria, CA |
| California | Carson | Carson, CA |
| California | Caruthers | Caruthers, CA |
| California | Casmalia | Casmalia, CA |
| California | Caspar | Caspar, CA |
| California | Cassel | Cassel, CA |
| California | Castaic | Castaic, CA |
| California | Castella | Castella, CA |
| California | Castro Valley | Castro Valley, CA |