Sullivan County, New Hampshire

Sullivan County is a county in New Hampshire with an estimated population of 43,969 in 2023. 1 cities, towns and Census places in it are indexed here.

Largest places in Sullivan County

About Sullivan County

Sullivan County is one of the counties of New Hampshire. County governments in New Hampshire 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.