Claim: Potawatomi Islands are islands that transition from Green Bay to Lake Michigan, the largest of these is Washington Island and others include Plum Island which covers an area of 1.179 square kilometres.
Evidence: The uninhabited island has a land area of 1.179 square kilometres (0.455 sq mi) or 117.87 hectares (291.3 acres). The Potawatomi Islands is the most common historic name given to the string of islands that delineate the transition from Green Bay to Lake Michigan, one of the Great Lakes. The largest of these is Washington Island, in Door County, Wisconsin. Others include Plum Island, Detroit Island, Hog Island, Pilot Island, and Rock Island.