Roberts County, South Dakota

Roberts County, South Dakota
Location within the U.S. state of South Dakota
Coordinates: 45°37′24.229″N 96°56′51.183″W / 45.62339694°N 96.94755083°W / 45.62339694; -96.94755083
Country United States
State South Dakota
FoundedMarch 8, 1883 (organized)
August 6, 1883 (organized)
Named afterS. G. Roberts
SeatSisseton
Largest citySisseton
Area
 • Total
1,135.777 sq mi (2,941.65 km2)
 • Land1,101.055 sq mi (2,851.72 km2)
 • Water34.722 sq mi (89.93 km2)  3.1%
Population
 (2020)
 • Total
10,280
 • Estimate 
(2024)
10,283
 • Density9.271/sq mi (3.580/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional districtAt-large
Websiterobertscosd.gov

Roberts County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 10,280. Its county seat is Sisseton. The county was named for S. G. Roberts of Fargo, North Dakota. It was created on March 8, 1883, and fully organized by August 6 of that year. Its boundary was altered once, in 1885.