Coos County, New Hampshire

Coos County is a county in New Hampshire with an estimated population of 31,372 in 2023. 1 cities, towns and Census places in it are indexed here.

Largest places in Coos County

About Coos County

Coos 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.