Sheboygan is a city in and the county seat of Sheboygan County, Wisconsin, United States. The population was 49,929 at the 2020 census. It is the principal city of the Sheboygan, Wisconsin Metropolitan Statistical Area, which has a population of 118,034. The city is located on the western shore of Lake Michigan at the mouth of the Sheboygan River, about 50 miles north of Milwaukee and 64 mi south of Green Bay.