- Colfax Spring
- Columbia Village
- Comstock Ranch
- Confidence
- Cow Creek
- Crystal Falls
- Cuesta Oaks
- Cuesta Serena
- Curtis Creek Ranch
- Cabrillo Village
- Camp Bartlett
- Camulos
- Casitas Mobile Home Park
- Cat Rock
- Cavin
- Chatsworth Lake Manor
- Chrisman
- Cadenasso
- Capay
- Central
- Citrona
- Conaway
- Coniston
- Country Villa Estates
- Casa Mia Mobile Home Park
- Challenge-Brownsville
- Country Side Mobile Home Park