Cowlitz County, Washington

Cowlitz County is a county in Washington with an estimated population of 112,864 in 2023. 5 cities, towns and Census places in it are indexed here.

Largest places in Cowlitz County

About Cowlitz County

Cowlitz 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.