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Grant County, South Dakota facts for kids

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Grant County
County Courthouse
County Courthouse
Map of South Dakota highlighting Grant County
Location within the U.S. state of South Dakota
Map of the United States highlighting South Dakota
South Dakota's location within the U.S.
Country  United States
State  South Dakota
Founded 1873 (created)
January 8, 1878 (organized)
Named for Ulysses S. Grant
Seat Milbank
Largest city Milbank
Area
 • Total 688 sq mi (1,780 km2)
 • Land 681 sq mi (1,760 km2)
 • Water 6.1 sq mi (16 km2)  0.9%
Population
 (2020)
 • Total 7,556
 • Estimate 
(2021)
7,519 Decrease
 • Density 10.983/sq mi (4.240/km2)
Time zone UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
Congressional district At-large

Grant County is a county in the U.S. state of South Dakota. As of the 2020 United States Census, the population was 7,556. 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.

Geography

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.

Major highways

  • I-29.svg Interstate 29
  • US 12.svg U.S. Highway 12
  • US 81.svg U.S. Highway 81
  • SD 15.svg South Dakota Highway 15
  • SD 20.svg South Dakota Highway 20
  • SD 123.svg South Dakota Highway 123
  • SD 158.svg South Dakota Highway 158

Adjacent counties

Demographics

Historical population
Census Pop.
1880 3,010
1890 6,814 126.4%
1900 9,103 33.6%
1910 10,303 13.2%
1920 10,880 5.6%
1930 10,729 −1.4%
1940 10,552 −1.6%
1950 10,233 −3.0%
1960 9,913 −3.1%
1970 9,005 −9.2%
1980 9,013 0.1%
1990 8,372 −7.1%
2000 7,847 −6.3%
2010 7,356 −6.3%
2020 7,556 2.7%
2021 (est.) 7,519 2.2%
US Decennial Census
1790-1960 1900-1990
1990-2000 2010-2020

2010 census

As of the 2010 United States Census, there were 7,356 people, 3,089 households, and 2,076 families in the county. The population density was 10.8 inhabitants per square mile (4.2/km2). There were 3,526 housing units at an average density of 5.2 per square mile (2.0/km2). The racial makeup of the county was 97.1% white, 0.5% American Indian, 0.3% Asian, 0.1% black or African American, 1.1% from other races, and 0.8% from two or more races. Those of Hispanic or Latino origin made up 2.3% of the population. In terms of ancestry, 49.9% were German, 16.8% were Norwegian, 8.9% were Irish, 6.7% were Swedish, 5.6% were English, and 5.2% were American.

Of the 3,089 households, 28.1% had children under the age of 18 living with them, 57.2% were married couples living together, 6.1% had a female householder with no husband present, 32.8% were non-families, and 29.6% of all households were made up of individuals. The average household size was 2.35 and the average family size was 2.89. The median age was 45.1 years.

The median income for a household in the county was $42,625 and the median income for a family was $56,250. Males had a median income of $36,204 versus $25,567 for females. The per capita income for the county was $22,887. About 7.0% of families and 11.6% of the population were below the poverty line, including 13.8% of those under age 18 and 17.8% of those age 65 or over.

Communities

Cities

Towns

Unincorporated communities

Townships

The county is divided into seventeen townships:

  • Adams
  • Alban
  • Big Stone
  • Blooming Valley
  • Farmington
  • Georgia
  • Grant Center
  • Kilborn
  • Lura
  • Madison
  • Mazeppa
  • Melrose
  • Osceola
  • Stockholm
  • Troy
  • Twin Brooks
  • Vernon

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