Towns
| State | City/Town | Town Title |
|---|---|---|
| California | Comptche | Comptche, CA |
| California | Compton | Compton, CA |
| California | Concord | Concord, CA |
| California | Cool | Cool, CA |
| California | Copperopolis | Copperopolis, CA |
| California | Corcoran | Corcoran, CA |
| California | Corning | Corning, CA |
| California | Corona | Corona, CA |
| California | Corona Del Mar | Corona Del Mar, CA |
| California | Coronado | Coronado, CA |
| California | Corte Madera | Corte Madera, CA |
| California | Costa Mesa | Costa Mesa, CA |
| California | Cotati | Cotati, CA |
| California | Cottonwood | Cottonwood, CA |
| California | Coulterville | Coulterville, CA |
| California | Courtland | Courtland, CA |
| California | Covelo | Covelo, CA |
| California | Covina | Covina, CA |
| California | Coyote | Coyote, CA |
| California | Crescent City | Crescent City, CA |
| California | Crescent Mills | Crescent Mills, CA |
| California | Cressey | Cressey, CA |
| California | Crest Park | Crest Park, CA |
| California | Crestline | Crestline, CA |
| California | Creston | Creston, CA |