Lower Sioux Indian Reservation

Lower Sioux Indian Community
Caŋṡa'yapi (Dakota)
Čhaŋšáyapi (Lakota)
Location of the Lower Sioux Indian Community
Established1851 (1851)
CapitalMorton, Minnesota
Government
  PresidentRobert Larsen
Area
  Total
2.69 sq mi (7.0 km2)
Population
 (2020)
  Total
534
DemonymMdewakanton
Time zoneCT
Area code(s)507
Websitelowersioux.com

The Lower Sioux Indian Community, (Dakota: Caŋṡa'yapi; Lakota: Čhaŋšáyapi) also known as the Mdewakanton Tribal Reservation, is an Indian reservation located along the southern bank of the Minnesota River in Paxton and Sherman townships in Redwood County, Minnesota. Its administrative headquarters is two miles south of Morton. The reservation is located southeast of Redwood Falls, the county seat.

The area was established as part of a reservation for the Mdewakanton and Wahpekute bands of the Lower Sioux under the Treaty of Traverse des Sioux in 1851 with the federal government. It originally extended about 70 miles (110 km) along the Minnesota River and was 20 miles (30 km) wide. It was greatly reduced following the Dakota War of 1862 and various other actions. As of the 2020 census, this lower reservation had a population of 534, and a land area of 2.69 square miles (7.0 km2).