- Chapel Island
- Chasm Falls
- Cooks Mill
- Corey Island
- Coreys
- Cold Brook
- Cold Spring Harbor
- Colonie
- Commack
- Canada Lake
- Caroga Lake
- Carpenters Corners
- Cork
- Cranberry Creek
- Crum Creek
- Congers
- Constableville
- Constantia
- Cooperstown
- Cookville
- Country Meadows
- Copake Lake
- Copenhagen
- Copiague
- Coram
- Corinth
- Cornwall-on-Hudson
- Cortland
- Country Knolls
- Cove Neck