- Carthage
- Carthew Bay
- Cashtown Corners
- Cassburn
- Cassel
- Casselman
- Castile
- Castle Heights
- Castle Island
- Castleton
- Cavan
- Caverlys Landing
- Cecebe
- Cedar Beach
- Cedar Croft
- Cedar Lake
- Cedar Nook
- Cedar Shores
- Cedar Valley
- Cedar Village
- Cedardale
- Cedardale
- Cedarhurst Beach
- Cedarmont Beach
- Cedarville
- Cedarville
- Central Park
- Central Patricia
- Centralia
- Centre Dummer