Heritage Hill State Historical Park, also called Heritage Hill State Park, is a 48-acre open-air museum in Allouez near Green Bay, Wisconsin, United States. A Wisconsin state park, the site is operated by a non-profit organization called the Heritage Hill Foundation in partnership with the Wisconsin Department of Natural Resources (DNR). The Heritage Hill Corporation operates, maintains and develops the park under terms of a lease with the DNR. The site contains more than 30 historical structures, mostly endangered historic buildings moved from other locations plus a few modern reconstructions.