Grant County, South Dakota

Grant County, South Dakota
County Courthouse
Location in the U.S. state of South Dakota
South Dakota's location in the U.S.
Founded	January 8, 1878
Named for	Ulysses S. Grant
Seat	Milbank
Largest city	Milbank
Area
• Total	688 sq mi (1,782 km2)
• Land	681 sq mi (1,764 km2)
• Water	6.1 sq mi (16 km2), 0.9%
Population (est.)
• (2015)	7,142
• Density	11/sq mi (4/km²)
Congressional district	At-large
Time zone	Central: UTC-6/-5
Website	grantcounty.sd.gov

Grant County is a county located in the U.S. state of South Dakota. As of 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.

According to the U.S. Census Bureau, the county has a total area of 688 square miles (1,780 km²), of which 681 square miles (1,760 km²) is land and 6.1 square miles (16 km²) (0.9%) is water.

The lowest point in the state of South Dakota is located on Big Stone Lake at Big Stone City in Grant County, adjacent to Ortonville, Minnesota, where the lake flows into the Minnesota River.

As of the census of 2000, there were 7,847 people, 3,116 households, and 2,156 families residing in the county. The population density was 12 people per square mile (4/km²). There were 3,456 housing units at an average density of 5 per square mile (2/km²). The racial makeup of the county was 98.61% White, 0.01% Black or African American, 0.43% Native American, 0.23% Asian, 0.40% from other races, and 0.32% from two or more races. 0.55% of the population were Hispanic or Latino of any race. 52.0% were of German, 16.3% Norwegian and 5.4% American ancestry according to the 2000 census.