Manitowoc, WI

ZIP code 54220 includes Sturgeon Bay, Wisconsin, the county seat of Door County, on the shore of Green Bay. Notable landmarks include the Door County Maritime Museum, which features exhibits on Great Lakes history and shipbuilding; the historic Michigan Street Bridge, a lift bridge across the Sturgeon Bay Ship Canal; and the Door County Historical Museum, which presents the area’s local history. The waterfront reflects the city’s maritime heritage.