- Cedar Island
- Cedar Island
- Cedar Land
- Centerville
- Chaffinch Island
- Charles Island
- City of Milford (balance)
- City Point
- Clam Island
- Clintonville
- Cut in Two Island
- Clarks Corner
- Calves Island
- Calves Island Bar
- Center Groton
- Chesterfield
- Clarks Falls
- Clarks Village
- Clayville
- Conning Towers-Nautilus Park
- Cormorant Rock
- Crescent Beach
- Crescent Park
- Crowley Corner
- Chaffeeville
- Conantville
- Canton Valley
- Cheshire
- Cannondale
- Canterbury