The Mother of All Counties

The Lewis County Historical Society and Museum celebrates the storied history of Lewis County, Washington. Founded on December 21, 1845, Lewis County once stretched at one point from the Cowlitz River to the south and north to Sitka, Alaska. Come celebrate our rural heritage of the hop fields and timber industry to the Chehalis and Cowlitz Native American tribes.

Discover the History of Lewis County

Join us in preserving history

Historical Society Membership

Become a member of the Lewis County Historical Museum family with a museum membership! Your membership to the Historical Society family helps support historical preservation, education, and digitization programs throughout the Museum.

Visit us on April 1-2

Come on down to the Southwest Washington Fairgrounds on April 1st-2nd at 10am-4pm for the Model Train Show & Swap Meet! What a fun adventure for the entire family to run trains and start your own hobby at home!

Model Train Show & Swap Meet

Visit our Historic Archives

Historical Society Research Library

The research library holds countless archives and records chronicling the entire history of Lewis County.