Fairfax County, Virginia

Fairfax County is a county in Virginia with an estimated population of 1,141,878 in 2023. 3 cities, towns and Census places in it are indexed here.

Largest places in Fairfax County

About Fairfax County

Fairfax County is one of the counties of Virginia. County governments in Virginia 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.