Roberts County is a county located in the state of South Dakota. Based on the 2010 census, the population was 10,149. Its county seat is Sisseton. The county was named either for S. G. Roberts of Fargo, North Dakota, or for Solomon Robar, an early local French fur trader.
Roberts is named for territorial legislator S. G. Roberts.
County QuickFacts: CensusBureau Quick Facts
Roberts County, created and organized in 1883, has a name of uncertain derivation. One theory has it named for S. G. Roberts, a book publisher who was a member of the council in the Territorial Legislature. The county seat was originally located at Travare. Wilmot wanted the county seat and a court battle followed. Travare won but the records were taken by force and moved to Wilmot where it stayed until 1898 when by a similar situation the records were taken from Wilmot to Sisseton.
As reported by the Census Bureau, the county has a total area of 1,135 square miles (2,941 km2), of which,
1,101 square miles (2,852 km2) of it is land and 34 square miles (88 km2) of it (3.00%) is water.
Bordering counties are as follows: