Eau Claire is a city in Chippewa and Eau Claire counties in the west-central part of the U.S. state of Wisconsin. Located almost entirely in Eau Claire County, for which it is the county seat, the city had a population of 65,883 at the 2010 census, making it the state's ninth-largest city. Eau Claire is the principal city of the Eau Claire, Wisconsin Metropolitan Statistical Area, which is a part of the Eau Claire-Menomonie Combined Statistical Area.