- Carlmar
- Clarkston Heights
- Clarkston Heights-Vineland
- Cloverland
- Craige
- Chaffee
- Clover Island
- Cooks Island (historical)
- Chiwaukum
- Chumstick
- Coffee Pot Island
- Coles Corner
- Conifer Mobile Home Park
- Cakesosta
- Carroll Island
- Cedar Glen Mobile Home Park
- Cedar Grove Mobile Home Park
- Cedar Hills Mobile Home Park
- City Center Mobile Home Park
- Clasen Cove Estates Mobile Home Park
- Classet
- Coville
- Crane
- Crescent
- Caples
- Caples Landing
- Coal Creek
- Columbia Heights
- Columbia Valley Gardens
- Cottonwood Island