Longview is a city situated in Cowlitz County in the state of Washington, United States. It serves as the principal city of the Longview, Washington Metropolitan Statistical Area, which encompasses the entirety of Cowlitz County. As of the 2020 census, the city had a population of 37,818, making it the most populous municipality within the county.
Geographically, Longview is located in southwestern Washington at the confluence of the Cowlitz and Columbia rivers. The city shares a border with Kelso to the east, which serves as the county seat.