The Washington State Historical Society is the historical society of the U.S. state of Washington.
Based in Tacoma, it is a 501(c)(3) nonprofit and is a trustee agency of the state.
The society owns and operates the Washington State History Museum.
The society's official journal is Columbia: The Magazine of Northwest History.
In 2016, the publication received a Leadership in History Award of Merit from the American Association for State and Local History.