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Brown County, South Dakota facts for kids

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Brown County
Brown County Courthouse in summer
Map of South Dakota highlighting Brown 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 July 6, 1881
Seat Aberdeen
Largest city Aberdeen
Area
 • Total 1,731 sq mi (4,480 km2)
 • Land 1,713 sq mi (4,440 km2)
 • Water 18 sq mi (50 km2)  1.0%
Population
 (2020)
 • Total 38,301
 • Estimate 
(2021)
38,101 Decrease
 • Density 22.127/sq mi (8.5431/km2)
Time zone UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
Congressional district At-large

Brown County is a county in the U.S. state of South Dakota. As of the 2020 United States Census, the population was 38,301, making it the fourth-most populous county in South Dakota. Its county seat is Aberdeen. The county is named for Alfred Brown, of Hutchinson County, South Dakota, a Dakota Territory legislator in 1879.

Brown County is part of the Aberdeen, SD Micropolitan Statistical Area.

Geography

According to the U.S. Census Bureau, the county has a total area of 1,731 square miles (4,480 km2), of which 1,713 square miles (4,440 km2) is land and 18 square miles (47 km2) (1.0%) is water.

Major highways

  • US 12.svg U.S. Highway 12
  • US 281.svg U.S. Highway 281
  • SD 10.svg South Dakota Highway 10
  • SD 37.svg South Dakota Highway 37

Adjacent counties

National protected area

Demographics

Historical population
Census Pop.
1880 353
1890 16,855 4,674.8%
1900 15,286 −9.3%
1910 25,867 69.2%
1920 29,509 14.1%
1930 31,458 6.6%
1940 29,676 −5.7%
1950 32,617 9.9%
1960 34,106 4.6%
1970 36,920 8.3%
1980 36,962 0.1%
1990 35,580 −3.7%
2000 35,460 −0.3%
2010 36,531 3.0%
2020 38,301 4.8%
2021 (est.) 38,101 4.3%
US Decennial Census
1790-1960 1900-1990
1990-2000 2010-2020

2010 census

As of the 2010 United States Census, there were 36,531 people, 15,489 households, and 9,374 families in the county. The population density was 21.3 inhabitants per square mile (8.2/km2). There were 16,706 housing units at an average density of 9.8 per square mile (3.8/km2). The racial makeup of the county was 93.2% white, 3.0% American Indian, 1.0% Asian, 0.5% black or African American, 0.1% Pacific islander, 0.4% from other races, and 1.7% from two or more races. Those of Hispanic or Latino origin made up 1.4% of the population. In terms of ancestry,

Of the 15,489 households, 28.4% had children under the age of 18 living with them, 48.5% were married couples living together, 8.1% had a female householder with no husband present, 39.5% were non-families, and 33.0% of all households were made up of individuals. The average household size was 2.27 and the average family size was 2.89. The median age was 38.6 years.

The median income for a household in the county was $45,615 and the median income for a family was $58,683. Males had a median income of $37,997 versus $28,419 for females. The per capita income for the county was $23,878. About 5.6% of families and 10.2% of the population were below the poverty line, including 9.6% of those under age 18 and 15.4% of those age 65 or over.

Communities

Cities

Towns

Census-designated places

Unincorporated communities

Townships

The county is divided into forty-four townships:

  • Aberdeen
  • Allison
  • Bates
  • Bath
  • Brainard
  • Cambria
  • Carlisle
  • Claremont
  • Columbia
  • East Hanson
  • East Rondell
  • Franklyn
  • Frederick
  • Garden Prairie
  • Garland
  • Gem
  • Greenfield
  • Groton
  • Hecla*Henry
  • Highland
  • Lansing
  • Liberty
  • Lincoln
  • Mercier
  • New Hope
  • North Detroit
  • Oneota
  • Ordway
  • Osceola
  • Palmyra
  • Portage
  • Prairiewood
  • Putney
  • Ravinia
  • Richland
  • Riverside
  • Savo
  • Shelby
  • South Detroit
  • Warner
  • West Hanson
  • Westport
  • West Rondell
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