Cowlitz County
County in Washington State
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. Wikipedia
Population: 111,956 (2022)
Cities: Longview, Kelso, Castle Rock, and more
Congressional district: 3rd
Founded: April 21, 1854
Largest city: Longview
Seat: Kelso