Clay County, South Dakota

Last updated

Clay County
County
VermilionSD ClayCountyCourthouse.jpg
Clay County Courthouse
Map of South Dakota highlighting Clay County.svg
Location within the U.S. state of South Dakota
South Dakota in United States.svg
South Dakota's location within the U.S.
Coordinates: 42°55′N96°58′W / 42.92°N 96.97°W / 42.92; -96.97
CountryFlag of the United States.svg United States
StateFlag of South Dakota.svg  South Dakota
Founded1862
Named after Henry Clay
Seat Vermillion
Largest cityVermillion
Area
 • Total
417 sq mi (1,080 km2)
 • Land412 sq mi (1,070 km2)
 • Water5.1 sq mi (13 km2)  1.2%
Population
 (2020)
 • Total
14,967
 • Estimate 
(2023)
15,431 Increase2.svg
 • Density36/sq mi (14/km2)
Time zone UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
Congressional district At-large
Website www.claycountysd.org

Clay County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 14,967. [1] The county seat is Vermillion, [2] which is also home to the University of South Dakota. The county is named for Henry Clay, American statesman, US Senator from Kentucky, and United States Secretary of State in the 19th century. [3] Clay County comprises the Vermillion, SD Micropolitan Statistical Area , which is also included in the Sioux City-Vermillion, Iowa-SD-Nebraska Combined Statistical Area.

Contents

History

The future Clay County area was opened for legal settlement in 1859. In Autumn 1859, Ahira A. Partridge (who would become the first elected sheriff of the county) crossed the Missouri river into the Dakota territory, and became the first white man to settle, on 160 acres of land that now underlies Vermillion. [4] In 1862 the county was formally organized. The Clay County Courthouse was built in 1912.

Clay County is the name of 17 other counties in the United States, most of them named for Henry Clay.

Geography

Clay County lies on the south line of South Dakota. The south boundary line of Clay County abuts the north line of the state of Nebraska (across the Missouri River). The Missouri River flows southeast along the south boundary line of Clay County. A small drainage creek flows into the county from Turner County, draining the central and eastern portions of the county and discharging into the river. Smaller drainages move water from the western county areas into the river. In addition to sloping into the drainage through the center of the county, the terrain generally slopes to the south. [5] The area is largely devoted to agriculture. [6]

The county has a total area of 417 square miles (1,080 km2), of which 412 square miles (1,070 km2) is land and 5.1 square miles (13 km2) (1.2%) is water. [7] It is the smallest county by area in South Dakota.

Adjacent counties

Major highways

Protected areas

Demographics

Historical population
CensusPop.Note%±
1870 2,621—
1880 5,00190.8%
1890 7,50950.1%
1900 9,31624.1%
1910 8,711−6.5%
1920 9,65410.8%
1930 10,0884.5%
1940 9,592−4.9%
1950 10,99314.6%
1960 10,810−1.7%
1970 12,92319.5%
1980 13,6895.9%
1990 13,186−3.7%
2000 13,5372.7%
2010 13,8642.4%
2020 14,9678.0%
2024 (est.)15,245 [8] 1.9%
U.S. Decennial Census [9]
1790-1960 [10] 1900-1990 [11]
1990-2000 [12] 2010-2020 [1]

2020 census

As of the 2020 census, there were 14,967 people, 5,564 households, and 2,795 families residing in the county. [13] The population density was 36.3 inhabitants per square mile (14.0/km2). There were 6,180 housing units.

2010 census

As of the 2010 census, there were 13,864 people, 5,110 households, and 2,628 families in the county. The population density was 33.6 inhabitants per square mile (13.0/km2). There were 5,639 housing units at an average density of 13.7 per square mile (5.3/km2). The racial makeup of the county was 91.1% White, 3.1% American Indian, 1.7% Asian, 1.3% black or African American, 0.5% from other races, and 2.3% from two or more races. Those of Hispanic or Latino origin made up 2.0% of the population. In terms of ancestry, 43.9% were German, 16.4% were Norwegian, 15.8% were Irish, 8.7% were English, 5.4% were Swedish, and 1.8% were American.

Of the 5,110 households, 24.7% had children under the age of 18 living with them, 40.9% were married couples living together, 7.3% had a female householder with no husband present, 48.6% were non-families, and 32.4% of all households were made up of individuals. The average household size was 2.28 and the average family size was 2.91. The median age was 25.0 years.

The median income for a household in the county was $37,198 and the median income for a family was $61,159. Males had a median income of $37,059 versus $28,016 for females. The per capita income for the county was $19,518. About 8.0% of families and 24.0% of the population were below the poverty line, including 13.6% of those under age 18 and 6.7% of those age 65 or over.

Racial/ethnic makeup

The racial makeup of the county was 92.78% White, 1.00% Black or African American, 2.66% Native American, 1.95% Asian, 0.01% Pacific Islander, 0.29% from other races, and 1.31% from two or more races. 0.89% of the population were Hispanic or Latino of any race. 32.0% were of German, 15.6% Norwegian, 9.9% Irish and 5.4% English ancestry.

Religion

From 2000 Census data, over 50% consider themselves "unclaimed". [14]

Education

Communities

Cities

Town

Census-designated places

Unincorporated communities

Townships

Politics

Largely due to the presence of the University of South Dakota, Clay County has consistently voted for Democratic Party candidates for president from 1988 onward, frequently by double digit margins. In 2000, 2016, 2020, and 2024, it was the only county in the Dakotas without a Native American majority to vote Democratic for president.

United States presidential election results for Clay County, South Dakota [19]
Year Republican Democratic Third party(ies)
No. %No. %No. %
2024 2,57445.50%2,94452.04%1392.46%
2020 2,45643.10%3,08354.11%1592.79%
2016 2,10941.61%2,60851.45%3526.94%
2012 2,14741.02%2,95556.46%1322.52%
2008 2,29636.78%3,80861.01%1382.21%
2004 2,69243.87%3,31554.03%1292.10%
2000 2,36346.29%2,63851.67%1042.04%
1996 2,00836.04%2,98053.48%58410.48%
1992 1,86930.96%2,82646.82%1,34122.22%
1988 2,30744.37%2,85954.98%340.65%
1984 3,05752.63%2,71146.68%400.69%
1980 3,00447.56%2,27135.96%1,04116.48%
1976 2,64749.93%2,59348.92%611.15%
1972 2,51847.05%2,82152.71%130.24%
1968 2,24951.28%2,00645.74%1312.99%
1964 1,80240.95%2,59959.05%00.00%
1960 2,77259.61%1,87840.39%00.00%
1956 2,63257.72%1,92842.28%00.00%
1952 3,30270.05%1,41229.95%00.00%
1948 2,22851.09%2,08047.70%531.22%
1944 1,97052.31%1,79647.69%00.00%
1940 2,46352.08%2,26647.92%00.00%
1936 1,69233.60%3,07060.97%2735.42%
1932 1,51432.74%3,04065.74%701.51%
1928 2,57363.42%1,47436.33%100.25%
1924 1,41542.30%49214.71%1,43842.99%
1920 1,88561.88%90729.78%2548.34%
1916 1,00044.52%1,20753.74%391.74%
1912 00.00%92941.00%1,33759.00%
1908 1,29159.94%80337.28%602.79%
1904 1,72377.40%36116.22%1426.38%
1900 1,38756.41%1,03742.17%351.42%
1896 1,23853.36%1,06145.73%210.91%
1892 91853.65%1649.59%62936.76%

See also

References

  1. 1 2 "State & County QuickFacts". United States Census Bureau. Retrieved March 21, 2024.
  2. ↑ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
  3. ↑ Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. p.  83.
  4. ↑ Kingsbury, George (1915). Smith, George (ed.). History of Dakota Territory, Vol. 4. Chicago: S.J. Clarke. pp.  654–657.
  5. ↑ ""Find an Altitude" Google Maps (accessed January 31, 2019)". Archived from the original on May 21, 2019. Retrieved February 1, 2019.
  6. ↑ Clay County SD Google Maps (accessed January 31, 2019)
  7. ↑ "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Retrieved March 23, 2015.
  8. ↑ "County Population Totals and Components of Change: 2020-2024" . Retrieved March 15, 2025.
  9. ↑ "U.S. Decennial Census". United States Census Bureau. Retrieved March 23, 2015.
  10. ↑ "Historical Census Browser". University of Virginia Library. Archived from the original on August 11, 2012. Retrieved March 23, 2015.
  11. ↑ Forstall, Richard L., ed. (March 27, 1995). "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved March 23, 2015.
  12. ↑ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. April 2, 2001. Retrieved March 23, 2015.
  13. ↑ "US Census Bureau, Table P16: Household Type". United States Census Bureau. Retrieved March 20, 2024.
  14. ↑ "Clay County, SD Denominational groups". Association of Religion Date Archives (ARDA). 2000. Retrieved January 25, 2009.
  15. ↑ Alsen SD Google Maps (accessed January 31, 2019)
  16. ↑ Dalesburg SD Google Maps (accessed January 31, 2019)
  17. ↑ Greenfield SD Google Maps (accessed January 31, 2019)
  18. ↑ Hub City SD Google Maps (accessed January 31, 2019)
  19. ↑ Leip, David. "Atlas of US Presidential Elections". uselectionatlas.org. Retrieved April 13, 2018.

42°55′N96°58′W / 42.92°N 96.97°W / 42.92; -96.97

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