Blue Earth County is a county in the State of Minnesota. As of the 2020 census, the population was 69,112. Its county seat is Mankato. The county is named for the Blue Earth River and for the deposits of blue-green clay once evident along the... Wikipedia
Cities: Lake Crystal, Eagle Lake, Mapleton, and more
County seat: Mankato
Population: 69,631 (2022)
Congressional district: 1st
Founded: March 5, 1853
Named for: Blue Earth River