- City Point
- Clam Island
- Clarks Corner
- Clarks Falls
- Clarks Village
- Clayville
- Clinton
- Clinton Beach
- Clintonville
- Club Island
- Coachlight Village
- Cobalt
- Cobalt Landing
- Cockenoe Island
- Colchester
- Colebrook
- Coley Town
- Collinsville
- Colonial Mobile Home Park
- Columbia
- Compo
- Conantville
- Conning Towers-Nautilus Park
- Contentment Island
- Copps Island
- Copps Rocks
- Cormorant Rock
- Corner of the Pines
- Cornfield Park
- Cornwall