National Register of Historic Places listings in Mason County, Washington

This list presents the full set of buildings, structures, objects, sites, or districts designated on the National Register of Historic Places in Mason County, Washington, and offers brief descriptive information about each of them. The National Register recognizes places of national, state, or local historic significance across the United States. Out of over 90,000 National Register sites nationwide, Washington is home to approximately 1,500, and 17 of those are found in Mason County.