South Dakota Counties
South Dakota County map
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South Dakota Counties

There are sixty-six counties in the state of South Dakota. Todd County and Oglala Lakota County are the only counties in South Dakota which do not have their own county seats

Grant County, South Dakota

Grant County Education, Geography, and History

Grant County, South Dakota Courthouse

Grant County is a county located in the state of South Dakota. Based on the 2010 census, the population was 7,356. The county seat is Milbank. The county was founded in 1873 and organized in 1878. It is named for Ulysses S. Grant, 18th President of the United States.

Etymology - Origin of Grant County Name

Grant is named for American Civil War general and US President Ulysses S. Grant.


County QuickFacts: CensusBureau Quick Facts

Grant County History

Grant County as organized in 1878; however, no business was ever transacted, no elections held, as required by law, and the organization appeared to have gone by default. The county was attached to Deuel County for judiciary purposes. In June, 1878, a new petition was presented to the Governor asking for organization. The first county Commissioners board meeting was held June 17, 1878 and the county seat temporarily located at Inkpa City. Soon after the town of Milbank was erected action was started to make it the county seat. An election was held in November 1881 between 3 different towns. Milbank claimed to have won. The matter went to court and Milbank was named the county seat.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 688 square miles (1,782 km2), of which, 683 square miles (1,768 km2) of it is land and 5 square miles (14 km2) of it (0.78%) is water.

Neighboring Counties

Bordering counties are as follows:

  • Roberts County, South Dakota - north
  • Big Stone County, Minnesota - northeast
  • Lac qui Parle County, Minnesota - east
  • Deuel County, South Dakota - south
  • Codington County, South Dakota - southwest
  • Day County, South Dakota - west


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