- Catskill
- Cattaraugus
- Cayuga
- Cayuga Heights
- Cazenovia
- Cedarhurst
- Celoron
- Center Moriches
- Centereach
- Centerport
- Central Islip
- Central Square
- Central Valley
- Centre Island
- Chenango Lake
- Columbus
- Columbus Quarter
- Corbin Corner
- Coventry
- Coventryville
- Champlain
- Chappaqua
- Chateaugay
- Cheektowaga
- Carter's Mobile Home Park
- Chasands Mobile Home Park
- Chazy Landing
- Churubusco
- Clayburg
- Cliff Haven