The Delaware County Historical Museum Complex is an open-air museum in Hopkinton, Iowa, on the grounds of the former Lenox College. Established in 1959 and run by the Delaware County Historical Society, it includes nine buildings arranged as a museum campus. The complex preserves local history in a setting connected to one of the area’s former educational institutions. Its importance comes from bringing multiple historic structures together under one organization so the county’s past can be presented in a single place.