Douglas County, South Dakota

Douglas County, South Dakota
Douglas County Courthouse in Armour
Location within the U.S. state of South Dakota
Coordinates: 43°23′N 98°22′W / 43.39°N 98.36°W / 43.39; -98.36
Country United States
State South Dakota
Founded1873 (created)
1882 (organized)
Named afterStephen A. Douglas
SeatArmour
Largest cityArmour
Area
 • Total
434 sq mi (1,120 km2)
 • Land432 sq mi (1,120 km2)
 • Water1.9 sq mi (4.9 km2)  0.4%
Population
 (2020)
 • Total
2,835
 • Estimate 
(2024)
2,849
 • Density6.56/sq mi (2.53/km2)
Congressional districtAt-large
Websitedouglas.sdcounties.org

Douglas County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 2,835. Its county seat is Armour. The county was established in 1873 and organized in 1882. It is named for Stephen Douglas, Illinois political figure.