Sawyer County is a county in the U.S. state of Wisconsin. As of the 2020 census, its population was 18,074. Its county seat is Hayward. The county partly overlaps with the reservation of the Lac Courte Oreilles Band of Lake Superior Chippewa Indians.

Hayward is a city in Sawyer County, Wisconsin, United States, next to the Namekagon River. Its population was 2,533 at the 2020 census. It is the county seat of Sawyer County. The city is surrounded by the Town of Hayward. The City of Hayward was formally organized in 1883.