- Chard
- Crater
- Crest Island
- Clarkston
- Carlisle East
- Carlisle West
- Cedarville
- Cohassett
- Country Estates Mobile Home Park
- Crawfords Mobile Home Court
- Cle Elum
- Clear Lake
- Camano Island
- Camp Diana
- Captains Choice
- Columbia Beach
- Cornet
- Country Place Mobile Home Park
- Coveland
- Clyde Hill
- Camp Discovery
- Coyle
- Craven Penninsula (historical)
- Cohassett Beach
- Camelot Square Mobile Home Park
- Campton
- Canterbury Square Mobile Home Park
- Canyon View Mobile Home Park
- Cascade
- Cascade Mobile Villa