Sheboygan County is a county in the U.S. state of Wisconsin. It is named after the Sheboygan River. As of the 2020 census, the population was 118,034. Its county seat is Sheboygan. The county was created in 1836 and organized in 1846. At the time, it was located in the Wisconsin Territory. Sheboygan County comprises the Sheboygan, WI Metropolitan Statistical Area. Part of the Holyland region is located in northwestern Sheboygan County.

The Sheboygan River is a river flowing to Lake Michigan in eastern Wisconsin in the United States. It is about 81 mi (130 km) long and enters the lake at the city of Sheboygan. The name of the river is Chippewa in origin, Shawb-wa-way-gun, meaning 'hollow bone', 'noise underground' or 'river disappearing underground'.