Charlotte is a city and county seat of Eaton County, Michigan. As of the 2010 census, the city population was 9,074. Charlotte is in the centra…Charlotte is a city and county seat of Eaton County, Michigan. As of the 2010 census, the city population was 9,074. Charlotte is in the central portion of the county on the boundary between Eaton Township and Carmel Township but is politically independent of both. Interstate 69 serves the city and connects it to the state capital of Lansing. It is located 21 miles from downtown Lansing.