Lewis County on the map of Washington 2024. Cities, roads, borders and directions in Lewis County of Washington.

Lewis County is found in the southern part of the state of Washington. This beautiful county is named after Meriwether Lewis (1774-1809), the co-captain of the Lewis and Clark Expedition. The population of Lewis County exceeds 82 thousand people. The county, formed in 1845, covers an area of 2403 square miles. The county seat of Lewis County is Chehalis. This map shows the borders of Lewis County as well as neighboring counties, including major highways and natural objecsts as of 2024. 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 Lewis County.