- Calcium
- Caledonia
- Callicoon
- Camillus
- Canajoharie
- Canandaigua
- Canaseraga
- Canastota
- Canisteo
- Cape Vincent
- Carle Place
- Carthage
- Cassadaga
- Castile
- Castleton-on-Hudson
- Castorland
- Catskill
- Cattaraugus
- Cayuga
- Cayuga Heights
- Cazenovia
- Cedarhurst
- Celoron
- Center Moriches
- Centereach
- Centerport
- Central Islip
- Central Square
- Central Valley
- Centre Island
