Eau Claire is a city in Eau Claire and Chippewa counties in the U.S. state of Wisconsin. It is the county seat of Eau Claire County. It had a population of 69,421 in 2020, making it the state's eighth-most populous city. It is the principal city of the Eau Claire metropolitan area, locally known as the Chippewa Valley, and is also part of the larger Eau Claire–Menomonie combined statistical area.

Chippewa County is a county located in the U.S. state of Wisconsin. It is named for the historic Chippewa people, also known as the Ojibwe, who long controlled this territory. As of the 2020 census, the population was 66,297. Its county seat is Chippewa Falls. The county was founded in 1845 from Crawford County, then in the Wisconsin Territory, and organized in 1853.