Bayfield County is a county located in the U.S. state of Wisconsin. As of the 2020 census, its population is 16,220. Its county seat is Washburn. The county was created in 1845 and organized in 1850. The Red Cliff Band of Lake Superior Chippewa has a reservation in Bayfield County and is the county's largest employer.

Washburn is a city and the county seat of Bayfield County, in the U.S. state of Wisconsin. The population was 2,051 at the 2020 census. The city is just east of and adjacent to the Town of Washburn. It is in northern Wisconsin, on the shore of Lake Superior's Chequamegon Bay.