The Allenton State Wildlife Area is a wildlife area in Wisconsin along the East Branch of the Rock River (Mississippi River) tributary of the Mississippi River in western Washington County, Wisconsin. The area was once a glacial lake and is now a wooded bottomland. It is popular with birders and is part of the Great Wisconsin Birding and Nature Trail.[1] Theresa Marsh and its state wildlife area is to the park's north.[2]
The wildlife area includes habitat used by sandhill crane, marsh wren, swamp sparrow and snow geese. Rare species include the rough-legged hawk, northern harrier, bobolink and American bittern.[2]