- Cady
- Caffey
- Caffey Corner
- Calcite
- Calderwood
- Calf Island
- California
- Calvin Center
- Cambria
- Cambridge Junction
- Camelot Villa Mobile Home Community
- Camelot Village Mobile Home Park
- Camp Dejacket
- Camp Lu Lay Lea
- Campbell
- Campbell Corners
- Campbells Corner
- Campbells Corners
- Canada Corners
- Canada Shores
- Canandaigua
- Canby Corners
- Candlewick Court Mobile Home Park
- Canfield Beach
- Cannonsburg
- Canterbury Estates Mobile Home Park
- Captain Kidd Island
- Carbondale
- Carland
- Carleton Mobile Home Park