Columbia County, Washington

Columbia County is a county in Washington with an estimated population of 4,053 in 2023. 1 cities, towns and Census places in it are indexed here.

Largest places in Columbia County

About Columbia County

Columbia County is one of the counties of Washington. County governments in Washington 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.