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. These islands form the Town of Washington.
References
Potawatomi Islands Wikipedia(Text) CC BY-SA