Redwood County is a county located in the U.S. state of Minnesota. As of 2000, the population was 16,815. Its county seat is Redwood Falls. The Lower Sioux Indian Reservation is entirely within the county.
According to the U.S. Census Bureau, the county has a total area of 881 square miles (2,282 kmē), of which 880 square miles (2,278 kmē) is land and 2 square miles (4 kmē) (0.17%) is water. The Redwood River flows through the county to the Minnesota River.