Corson County, South Dakota

Corson County
County
Corson County Courthouse in McIntosh, South Dakota in 1993. This building was destroyed by fire on April 10, 2006.
Location within the U.S. state of South Dakota
South Dakota's location within the U.S.
Coordinates: 45°43′N 101°11′W / 45.72°N 101.18°W / 45.72; -101.18
Country	United States
State	South Dakota
Founded	1909
Named for	Dighton Corson
Seat	McIntosh
Largest city	McLaughlin
Area
• Total	2,530 sq mi (6,600 km2)
• Land	2,470 sq mi (6,400 km2)
• Water	60 sq mi (200 km2)  2.4%
Population  (2020)
• Total	3,902
• Estimate  (2023)	3,782
• Density	1.5/sq mi (0.60/km2)
Time zone	UTC−7 (Mountain)
• Summer (DST)	UTC−6 (MDT)
Congressional district	At-large
Website	corson.sdcounties.org

Corson County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 3,902.^[1] Its county seat is McIntosh.^[2] The county was named for Dighton Corson, a native of Maine, who came to the Black Hills in 1876, and in 1877 began practicing law at Deadwood.

The county is encompassed within the Standing Rock Indian Reservation, which extends into North Dakota. The Lakota people reside primarily in the South Dakota part of the reservation; the Yanktonai and Dakota live in that part in North Dakota. The Grand River, a tributary of the Missouri River, runs through the reservation.