Le Sueur County is a county located in the U.S. state of Minnesota. As of 2000, the population was 25,426. Its county seat is Le Center. The county is named for the French explorer Pierre-Charles Le Sueur who visited the area in 1700.

According to the U.S. Census Bureau, the county has a total area of 474 square miles (1,227 km²), of which 448 square miles (1,162 km²) is land and 25 square miles (66 km²) (5.35%) is water.

Official Le Sueur County website