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Clay County, South Dakota
Map of South Dakota highlighting Clay County
Location in the state of South Dakota
Map of USA SD
South Dakota's location in the U.S.
Founded information needed
Seat Vermillion
 - Total
 - Land
 - Water

417 sq mi (1,080 km²)
412 sq mi (1,067 km²)
5 sq mi (13 km²), 1.22%
 - (2000)
 - Density

34/sq mi (13/km²)

Clay County is a county located in the U.S. state of South Dakota. As of 2000, the population is 13,537. Its name is in honor of Henry Clay, famous American statesman, member of the United States Senate from Kentucky and United States Secretary of State in the 19th century. Its county seat is Vermillion6.


According to the U.S. Census Bureau, the county has a total area of 1,079 km² (417 sq mi). 1,066 km² (412 sq mi) of it is land and 13 km² (5 sq mi) of it (1.22%) is water.

Townships Edit

The county is divided into twelve townships: Bethel, Fairview Garfield, Glenwood, Meckling, Norway, Pleasant Valley, Prairie Center, Riverside, Spirit Mound, Star, Vermillion.

Major HighwaysEdit

Adjacent Counties Edit


Historical populations
Census Pop.
1900 9,316
1910 8,711 −6.5%
1920 9,654 10.8%
1930 10,088 4.5%
1940 9,592 −4.9%
1950 10,993 14.6%
1960 10,810 −1.7%
1970 12,923 19.5%
1980 13,689 5.9%
1990 13,186 −3.7%
2000 13,537 2.7%
Est. 2006 12,867 −4.9%

As of the census2 of 2000, there were 13,537 people, 4,878 households, and 2,721 families residing in the county. The population density was 13/km² (33/sq mi). There were 5,438 housing units at an average density of 5/km² (13/sq mi). 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.

There were 4,878 households out of which 28.00% had children under the age of 18 living with them, 45.00% were married couples living together, 8.10% had a female householder with no husband present, and 44.20% were non-families. 31.00% of all households were made up of individuals and 8.00% had someone living alone who was 65 years of age or older. The average household size was 2.32 and the average family size was 2.93.

In the county, the population was spread out with 18.80% under the age of 18, 31.50% from 18 to 24, 23.80% from 25 to 44, 15.80% from 45 to 64, and 10.10% who were 65 years of age or older. The median age was 25 years. For every 100 females there were 94.30 males. For every 100 females age 18 and over, there were 92.50 males.

Cities and towns Edit

Coordinates: 42°55′N 96°58′W / 42.92, -96.97

This page uses content from the English language Wikipedia. The original content was at Clay County, South Dakota. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License.

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