Roberts County

Also known as Roberts County, South Dakota, Roberts County, SD

county in South Dakota, United States

Key facts

Country: United States
State: South Dakota
Founded: March 8, 1883 (organized) , August 6, 1883 (organized)
Named after: S. G. Roberts
Seat: Sisseton
Largest city: Sisseton
Total: 1,135.777 sq mi (2,941.65 km )
Land: 1,101.055 sq mi (2,851.72 km )
Water: 34.722 sq mi (89.93 km ) 3.1%
Estimate 2025: 10,255
Density: 9.3/sq mi (3.6/km )
Time zone: UTC−6 ( Central )
Summer dst

Article

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.

Geography