- Cedar Valley
- Cedarbrook Mobile Home Park
- Cedardale
- Cedarhurst
- Cedarville
- Cedarville
- Cedarville
- Cedonia
- Cemetery Island
- Center Island
- Center Mobile Park
- Centerville
- Central Ferry
- Central Park
- Central Valley
- Central Valley Mobile Home Park
- Centralia
- Ceres
- Cha-Choo-Sen
- Chaffee
- Chain Hill
- Chambers
- Chard
- Charles Island
- Charleston
- Charter Oak
- Charwood Mobile Home Park
- Chattaroy
- Chautauqua
- Chehalis