County · Washington

Cowlitz County

Cowlitz County is a county located in the U.S. state of Washington. As of the 2020 census, its population was 110,730. The county seat is Kelso, and its largest city is Longview. The county was formed in April 1854. Its name derives from the anglicized version of the Cowlitz Indian term Cow-e-liske, meaning either 'river of shifting sands' or 'capturing the medicine spirit.' Cowlitz comprises the Longview, WA Metropolitan statistical area, which is also included in the Portland-Vancouver-Salem, OR-WA Combined statistical area.

Governance bodies

Board of County Commissioners Primary
governing council

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Reference data (Census of Governments 2022)

Census ID (PID6): 176794
FIPS state: 53
FIPS county: 015
FIPS place: 99015
Census record name: COUNTY OF COWLITZ
Mailing address: 207 N 4TH AVE, KELSO 98626