The Kandiyohi County Historical Society is a local history museum in Willmar, Minnesota, United States. Formerly known as the Old Settlers Association, it was founded in 1897 to "discover, preserve and share the story of Kandiyohi County and its people." The archives and Lawson research library are the principal sources used by KCHS staff, volunt…The Kandiyohi County Historical Society is a local history museum in Willmar, Minnesota, United States. Formerly known as the Old Settlers Association, it was founded in 1897 to "discover, preserve and share the story of Kandiyohi County and its people." The archives and Lawson research library are the principal sources used by KCHS staff, volunteers, and visitors to carry out this mission today and into the future. On average, the museum has 9,000 visitors annually.