- Charlotte Center
- Chedwel
- Cherry Creek Mobile Home Park
- Cherry Hill
- Clark
- Clear Creek
- Clymer Center
- Clymer Hill
- Colburns
- Conewango Valley
- Connelly Park
- Cook Corners
- Cordova
- Cottage Park
- Cottage Park
- Cowdens Corner
- Crestview Estates
- Cutting
- Canajoharie
- Canandaigua
- Canaseraga
- Canastota
- Canisteo
- Cape Vincent
- Carle Place
- Carthage
- Cassadaga
- Castile
- Castleton-on-Hudson
- Castorland