- Crannell
- Crescent City North
- Cressey
- Creston
- Crows Landing
- Crucero
- Cucamonga
- Cummings
- Calimesa
- Calipatria
- Calistoga
- Calwa
- Camarillo
- Cambria
- Cambrian Park
- Cameron Park
- Campbell
- Christie
- Coney Island
- Contra Costa Centre
- Cornwall
- Crolona Heights
- Cantua Creek
- Canyon Lake
- Canyondam
- Capitola
- Carmel-by-the-Sea
- Carmel Valley Village
- Carmichael
- Carpintería