Sheboygan is a city in and the county seat of Sheboygan County, Wisconsin, United States. The population was 50,792 at the 2000 census. It is the principal city of the Sheboygan, Wisconsin Metropolitan Statistical Area. The city is located on Lake Michigan at the mouth of the Sheboygan River, about 50 mi (81 km) north of Milwaukee and 64 mi (103 km) south of Green Bay.
According to the United States Census Bureau, the city has a total area of 14.1 square miles (36.4 km²), of which, 13.9 square miles (36.0 km²) of it is land and 0.2 square miles (0.4 km²) of it (1.07%) is water. It is located at latitude 43°45' north, longitude 87°44' west.
Sheboygan was founded in 1846. By 1849 it was known for its German population. On June 25, 1849 William Williams wrote, "Arrived at Sheboigin [sic] on the Wisconsin side, a small town population perhaps from 700 to 1000. This is a promising place. There are a great many best class of Germans settling around it. Tis all along the lake so far quite an interesting country." It was the first city in Wisconsin to elect a Socialist mayor.