Sanborn County, South Dakota

Sanborn County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 2,330.[2] Its county seat and largest city is Woonsocket.[3] The county was created by the Dakota Territorial legislature on May 1, 1883, with land partitioned from Miner County. It was fully organized by July 18, 1883.[4]

Sanborn County, South Dakota
Steam-powered automobile by E.S. Callihan in Woonsocket (1884)
Steam-powered automobile by E.S. Callihan in Woonsocket (1884)
Map of South Dakota highlighting Sanborn County
Location within the U.S. state of South Dakota
Coordinates: 44°02′N 98°05′W / 44.03°N 98.09°W / 44.03; -98.09
Country United States
State South Dakota
Founded1883
Named afterGeorge W. Sanborn
SeatWoonsocket
Largest cityWoonsocket
Area
  Total
570 sq mi (1,500 km2)
  Land569 sq mi (1,470 km2)
  Water1.2 sq mi (3.1 km2)  0.2%
Population
 (2020)
  Total
2,330
  Estimate 
(2025)[1]
2,388 Increase
  Density4.2/sq mi (1.6/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional districtAt-large

Geography

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The terrain of Sanborn County consists of rolling hills, largely devoted to agriculture. The James River flows southward through the east-central part of the county, and the SW part of the country is drained by Dry Run Creek.[5] The terrain slopes to the south and to the southeast; its highest point is in its SW corner, at 1,358 ft (414 m) ASL.[6] The county has a total area of 570 square miles (1,500 km2), of which 569 square miles (1,470 km2) is land and 1.2 square miles (3.1 km2) (0.2%) is water.[7]

Major highways

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Adjacent counties

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Protected areas

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  • McCoy Lake State Public Shooting Area[5]

Lakes and reservoirs

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Source:[5]

  • Long Lake
  • Twin Lakes (partial)

Demographics

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Historical population
CensusPop.Note
18904,610
19004,464−3.2%
19106,60748.0%
19207,87719.2%
19307,326−7.0%
19405,754−21.5%
19505,142−10.6%
19604,641−9.7%
19703,697−20.3%
19803,213−13.1%
19902,833−11.8%
20002,675−5.6%
20102,355−12.0%
20202,330−1.1%
2025 (est.)2,388Increase2.5%
U.S. Decennial Census:[8][9][10][11][2][12]

2020 census

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As of the 2020 census, there were 2,330 people, 936 households, and 630 families residing in the county.[13] The population density was 4.1 inhabitants per square mile (1.6/km2). Of the residents, 24.2% were under the age of 18 and 20.9% were 65 years of age or older; the median age was 40.5 years. For every 100 females there were 107.9 males, and for every 100 females age 18 and over there were 108.6 males.[13]

The racial makeup of the county was 93.8% White, 0.1% Black or African American, 1.1% American Indian and Alaska Native, 0.4% Asian, 0.4% from some other race, and 4.2% from two or more races. Hispanic or Latino residents of any race comprised 2.4% of the population.[14]

There were 936 households in the county, of which 31.4% had children under the age of 18 living with them and 16.8% had a female householder with no spouse or partner present. About 28.7% of all households were made up of individuals and 13.1% had someone living alone who was 65 years of age or older.[13]

There were 1,134 housing units, of which 17.5% were vacant. Among occupied housing units, 78.2% were owner-occupied and 21.8% were renter-occupied. The homeowner vacancy rate was 1.6% and the rental vacancy rate was 6.8%.[13]

2010 census

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As of the 2010 census, there were 2,355 people, 975 households, and 630 families in the county. The population density was 4.1 inhabitants per square mile (1.6/km2). There were 1,172 housing units at an average density of 2.1 units per square mile (0.81 units/km2). The racial makeup of the county was 98.0% white, 0.3% American Indian, 0.2% Asian, 0.6% from other races, and 1.1% from two or more races. Those of Hispanic or Latino origin made up 1.2% of the population. In terms of ancestry.

Of the 975 households, 24.2% had children under the age of 18 living with them, 55.0% were married couples living together, 6.3% had a female householder with no husband present, 35.4% were non-families, and 31.1% of all households were made up of individuals. The average household size was 2.24 and the average family size was 2.79. The median age was 47.1 years.

The median income for a household in the county was $44,732 and the median income for a family was $56,304. Males had a median income of $32,361 versus $23,724 for females. The per capita income for the county was $21,055. About 7.7% of families and 12.7% of the population were below the poverty line, including 21.4% of those under age 18 and 15.1% of those age 65 or over.

Communities

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City

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Towns

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Census-designated place

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Unincorporated community

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Townships

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  • Afton
  • Benedict
  • Butler
  • Diana
  • Elliott
  • Floyd
  • Jackson
  • Letcher
  • Logan
  • Oneida
  • Ravenna
  • Silver Creek
  • Twin Lake
  • Union
  • Warren
  • Woonsocket

Politics

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Sanborn County has been a swing county in the past, but in recent decades has tended to vote Republican. In 64% of the national elections since 1960, the county selected the Republican Party candidate (as of 2020).

United States presidential election results for Sanborn County, South Dakota[15]
Year Republican Democratic Third party(ies)
No.%No.%No.%
1892 564 55.62% 95 9.37% 355 35.01%
1896 530 50.72% 500 47.85% 15 1.44%
1900 628 51.56% 549 45.07% 41 3.37%
1904 1,013 74.05% 265 19.37% 90 6.58%
1908 847 57.70% 513 34.95% 108 7.36%
1912 0 0.00% 577 37.13% 977 62.87%
1916 711 42.00% 898 53.04% 84 4.96%
1920 1,125 49.89% 517 22.93% 613 27.18%
1924 1,184 47.34% 327 13.07% 990 39.58%
1928 1,576 54.08% 1,321 45.33% 17 0.58%
1932 860 26.21% 2,398 73.09% 23 0.70%
1936 1,174 36.64% 1,919 59.89% 111 3.46%
1940 1,732 55.34% 1,398 44.66% 0 0.00%
1944 1,212 54.84% 998 45.16% 0 0.00%
1948 990 48.03% 1,046 50.75% 25 1.21%
1952 1,761 66.05% 905 33.95% 0 0.00%
1956 1,327 50.48% 1,302 49.52% 0 0.00%
1960 1,254 50.10% 1,249 49.90% 0 0.00%
1964 912 39.43% 1,401 60.57% 0 0.00%
1968 1,024 49.71% 956 46.41% 80 3.88%
1972 1,064 49.60% 1,074 50.07% 7 0.33%
1976 881 46.08% 1,025 53.61% 6 0.31%
1980 1,178 60.97% 628 32.51% 126 6.52%
1984 1,080 63.72% 611 36.05% 4 0.24%
1988 815 51.10% 770 48.28% 10 0.63%
1992 595 36.96% 632 39.25% 383 23.79%
1996 630 43.81% 647 44.99% 161 11.20%
2000 767 60.49% 468 36.91% 33 2.60%
2004 817 57.29% 581 40.74% 28 1.96%
2008 669 55.43% 500 41.43% 38 3.15%
2012 688 61.70% 389 34.89% 38 3.41%
2016 819 72.93% 241 21.46% 63 5.61%
2020 905 76.37% 257 21.69% 23 1.94%
2024 929 76.65% 259 21.37% 24 1.98%

Education

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See also

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References

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  1. "QuickFacts". United States Census Bureau. Retrieved March 31, 2026.
  2. 1 2 "State & County QuickFacts". United States Census Bureau. Retrieved March 20, 2024.
  3. "Find a County". National Association of Counties. Retrieved June 7, 2011.
  4. "History of SD Counties/Sanborn (accessed February 8, 2019)". Archived from the original on May 8, 2021. Retrieved February 8, 2019.
  5. 1 2 3 Sanborn County SD Google Maps (accessed February 8, 2019)
  6. ""Find an Altitude" Google Maps (accessed February 8, 2019)". Archived from the original on May 21, 2019. Retrieved February 8, 2019.
  7. "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved March 28, 2015.
  8. "U.S. Decennial Census". United States Census Bureau. Retrieved July 20, 2014.
  9. "Historical Census Browser". University of Virginia Library. 2007. Archived from the original on December 12, 2009. Retrieved July 20, 2014.
  10. Forstall, Richard L. (March 27, 1995). "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Archived from the original on February 19, 1999. Retrieved July 20, 2014.
  11. "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Archived (PDF) from the original on March 27, 2010. Retrieved July 20, 2014.
  12. "County Population Totals and Components of Change: 2020-2025". Retrieved March 27, 2026.
  13. 1 2 3 4 "2020 Decennial Census Demographic Profile (DP1)". United States Census Bureau. United States Census Bureau. 2021. Retrieved 2025-12-04.
  14. "2020 Decennial Census Redistricting Data (Public Law 94-171)". United States Census Bureau. United States Census Bureau. 2021. Retrieved 2025-12-04.
  15. Leip, David. "Atlas of US Presidential Elections". uselectionatlas.org. Retrieved April 15, 2018.
  16. "2020 CENSUS - SCHOOL DISTRICT REFERENCE MAP: Sanborn County, SD" (PDF). United States Census Bureau. Retrieved April 10, 2024. - Text list

44°02′N 98°05′W / 44.03°N 98.09°W / 44.03; -98.09