- Cairo
- Calcium
- Caledonia
- Callicoon
- Calverton
- Cambria Heights
- Cambridge
- Camden
- Camillus
- Campbell
- Canajoharie
- Canandaigua
- Canarsie
- Canaseraga
- Canastota
- Candor
- Canisteo
- Canton
- Cape Vincent
- Carle Place
- Carmel
- Carmel Hamlet
- Caroga Lake
- Carthage
- Cassadaga
- Cassville
- Castile
- Castleton-on-Hudson
- Castorland
- Cato
- Catskill
- Cattaraugus
- Cayuga
- Cayuga Heights
- Cazenovia
- Cedarhurst
- Celoron
- Center Moriches
- Centereach
- Centerport
- Centerport
- Central Bridge
- Central Islip
- Central Square
- Central Valley
- Centre Island
- Chadwicks
- Champlain
- Chappaqua
- Charleston
- Chateaugay
- Chatham
- Chaumont
- Chautauqua
- Chazy
- Cheektowaga
- Chelsea
- Chenango Bridge
- Cherry Creek
- Cherry Valley
- Chester
- Chestertown
- Chestnut Ridge
- Chinatown
- Chittenango
- Churchville
- Cicero
- Cincinnatus
- City Island
- Clarence
- Clarence Center
- Clark Mills
- Clarkson
- Claverack-Red Mills
- Clay
- Clayton
- Clayville
- Cleveland
- Clifton
- Clifton Park
- Clifton Springs
- Clinton
- Clinton Corners
- Clintondale
- Clyde
- Clymer
- Cobleskill
- Cockaigne Ski Area
- Coeymans
- Cohocton
- Cohoes
- Cold Brook
- Cold Spring
- Cold Spring Harbor
- College Point
- Colonie
- Colton
- Columbus
- Commack
- Concord
- Conesus Hamlet
- Coney Island
- Congers
- Constableville
- Constantia
- Coopers Plains
- Cooperstown
- Copake Lake
- Copenhagen
- Copiague
- Coram
- Corfu
- Corinth
- Corning
- Cornwall
- Corona
- Cortland
- Cortland West
- Cortlandt Manor
- Country Knolls
- Cove Neck
- Coxsackie
- Cragsmoor
- Cranberry Lake
- Croghan
- Crompond
- Cropseyville
- Croton-on-Hudson
- Crown Heights
- Crown Point
- Crugers
- Crystal Beach
- Cuba
- Cumberland Head
- Cumminsville
- Cutchogue
- Cuylerville
- Cypress Hills
