 The Little Cobb River flows northwesterly through the SE part of the county, meeting with the Cobb River which flows northerly through the lower part of the county into the Blue Earth River.The Le Sueur River also flows west-northwesterly through the SE part of the county, discharging into the Blue Earth River.The county terrain consists of low rolling hills, with the area (except around built-up zones, and in areas carved by runoff) devoted to agriculture.