Jefferson County, New York
Jefferson County is a county in New York with an estimated population of 114,787 in 2023. 19 cities, towns and Census places in it are indexed here.
Largest places in Jefferson County
Watertown 24,157Carthage 3,264West Carthage 1,754Clayton 1,701Adams 1,678Sackets Harbor 1,364Black River 1,237Philadelphia 1,150Dexter 1,008Alexandria Bay 951Brownville 939Theresa 747Cape Vincent 728Evans Mills 621Chaumont 598Antwerp 512Glen Park 445Mannsville 320Deferiet 255
About Jefferson County
Jefferson County is one of the counties of New York. County governments in New York handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.