Cowlitz County on the map of Washington as of 2026. Cities, roads, borders and directions in Cowlitz County of Washington.

Cowlitz County is found in the southwestern part of the state of Washington. This beautiful county is named after Cowlitz, an Indian tribe. The population of Cowlitz County exceeds 111 thousand people. The county, formed in 1854, covers an area of 1139 square miles. The county seat of Cowlitz County is Kelso. This map shows the borders of Cowlitz County as well as neighboring counties, including major highways and natural objecsts as of 2026. Zoom in or out of the map using the plus/minus panel. Move the center of this map by dragging it. Also check out the satellite map of Cowlitz County.