A Wisconsin state park is an area of land in the U.S. state of Wisconsin preserved by the state for its natural, historic, or other resources. The state park system in Wisconsin includes both state parks and state recreation areas. Wisconsin currently has 51 state park units, covering more than 60,570 acres (245.1 km2) in state parks and state recreation areas. Each unit was created by an act of the Wisconsin Legislature and is maintained by the Wisconsin Department of Natural Resources, Division of Parks and Recreation. The Division of Forestry manages a further 471,329 acres (1,907.40 km2) in Wisconsin's state forests.
Several Wisconsin state parks contain resources that have been recognized on a national level. Chippewa Moraine State Recreation Area, Devil's Lake State Park, and Interstate State Park are units of the Ice Age National Scientific Reserve, while the Wyalusing Hardwood Forest in Wyalusing State Park is a National Natural Landmark. Two Wisconsin state parks contain National Historic Landmarks, both of which are Native American archaeological sites: Aztalan and Copper Culture. 15 state parks contain a total of 23 separate listings on the National Register of Historic Places (NRHP). These are the two previously mentioned National Historic Landmarks, plus Lake Farms Archaeological District at Capital Springs State Recreation Area, Copper Falls State Park, six individual buildings at Heritage Hill State Historical Park (Baird Law Office, Cotton House, Fort Howard Hospital, Fort Howard Officers' Quarters, Fort Howard Ward Building, and Tank Cottage), High Cliff Mounds at High Cliff State Park, the Seth Peterson Cottage in Mirror Lake State Park, the Raddatz Rockshelter at Natural Bridge State Park, Stonefield partially within Nelson Dewey State Park, Eagle Bluff Lighthouse in Peninsula State Park, the Roche-a-Cri Petroglyphs in Roche-a-Cri State Park, the shot tower in Tower Hill State Park, Whitefish Dunes-Bay View Site in Whitefish Dunes State Park, Wyalusing State Park Mounds Archaeological District in Wyalusing State Park, and four listings in Rock Island State Park: the Pottawatomie Lighthouse, Rock Island Historic District, Thordarson Estate Historic District, and a water tower.