Boulder County, Colorado
Boulder County is a county in Colorado with an estimated population of 326,831 in 2023. 8 cities, towns and Census places in it are indexed here.
Largest places in Boulder County
Boulder 105,898Longmont 98,630Lafayette 30,439Louisville 20,390Superior 13,361Lyons 2,151Nederland 1,488Jamestown 245
About Boulder County
Boulder County is one of the counties of Colorado. County governments in Colorado 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.