When the new public library was completed in 1980, the organization moved their headquarters and museum to the former library which had been completed in 1904 with a matching grant from Andrew Carnegie. As part of an effort to better reach the public, the organization moved its museum to the downtown area in 2014-2016. The Board of Trustees also renamed their organization as the Lyon County History Center.
The museum's permanent collection focusses heavily on the native inhabitants of the Great Plains, the natural environment of the Plains, and the arrival of settlers of European descent from the mid-19th century to the early 1900s. Reflecting the region's heritage as an agricultural center, many exhibits depict the centrality of farming and ranching to other industries such as transportation. The museum also includes exhibits that share the experience of Lyon County residents in times of hardship, war, and celebration.