- Covington
- Custer
- Clinton
- Cactus Island
- Cactus Islands
- Camp Orkila
- Canoe Island
- Castle Island
- Cayou Island
- Cemetery Island
- Center Island
- Charles Island
- Clark Island
- Cliff Island
- Cluster Islands
- Colville Island
- Coon Island
- Crab Island
- Crane Island
- Canoe
- Cap Sante
- Carriage Estates Mobile Home Park
- Cedar Lane Mobile Estates
- Cedardale
- Chuckanut Junction
- Cokedale
- Colonial Mobile Home Park
- Cone Islands
- Corkindale
- Country Mobile Home Court