- Source: Union County, South Dakota
Union County is the southernmost county in the U.S. state of South Dakota. As of the 2020 census, the population was 16,811, making it the 13th most populous county in South Dakota. Its county seat has been Elk Point since April 30, 1865. Originally named Cole County, its name was changed to Union on January 7, 1864, because of Civil War sentiment.
Union County is part of the Sioux City, IA–NE–SD Metropolitan Statistical Area. The Progressive Farmer rated Union County second in the "2006 Best Place to Live Survey" in the U.S., because "its schools are good, its towns neat and its people friendly".
History
Founded on April 10, 1862, as Cole County, it was renamed Union County on January 7, 1864, when its boundaries were changed to encompass land previously part of neighboring Lincoln County. The county seat was moved from Richland to Elk Point on April 30, 1865.
Geography
Union County lies on the southeast corner of South Dakota. Its east boundary line abuts the west boundary line of the State of Iowa (across the Big Sioux River), and its south/southwest boundary line abuts the north boundary line of the State of Nebraska (across the Missouri River). The Brule Creek flows southeasterly across the central part of the county, emptying into the Big Sioux. The county terrain consists of rolling hills, devoted to agriculture except around built-up areas. The terrain slopes to the south and east; its highest point is near its northwest corner, at 1,509 ft (460 m) ASL. The county has a total area of 467 square miles (1,210 km2), of which 461 square miles (1,190 km2) is land and 6.6 square miles (17 km2) (1.4%) is water. It is the fifth-smallest county in South Dakota by area.
= Major highways
== Adjacent counties
== Protected areas
== Lakes
=Burbank Lake (partial)
McCook Lake
Mud Lake
Demographics
= 2020 census
=As of the 2020 census, there were 16,811 people, 6,822 households, and 4,613 families in the county. The population density was 36.5 inhabitants per square mile (14.1/km2). There were 7,215 housing units.
= 2010 census
=As of the 2010 census, there were 14,399 people, 5,756 households, and 4,043 families in the county. The population density was 31.3 inhabitants per square mile (12.1/km2). There were 6,280 housing units at an average density of 13.6 per square mile (5.3/km2). The racial makeup of the county was 95.5% white, 0.9% Asian, 0.7% black or African American, 0.6% American Indian, 0.1% Pacific islander, 0.7% from other races, and 1.6% from two or more races. Those of Hispanic or Latino origin made up 2.1% of the population. In terms of ancestry, 42.0% were German, 18.2% were Norwegian, 17.7% were Irish, 7.9% were English, 6.8% were Swedish, and 3.7% were American.
Of the 5,756 households, 32.8% had children under the age of 18 living with them, 58.9% were married couples living together, 7.5% had a female householder with no husband present, 29.8% were non-families, and 25.1% of all households were made up of individuals. The average household size was 2.49 and the average family size was 2.98. The median age was 40.2 years.
The median income for a household in the county was $59,889 and the median income for a family was $71,308. Males had a median income of $42,702 versus $31,993 for females. The per capita income for the county was $33,783. About 3.9% of families and 4.9% of the population were below the poverty line, including 4.3% of those under age 18 and 10.5% of those age 65 or over.
Communities
= Cities
== Census-designated places
=Dakota Dunes
Richland
= Unincorporated communities
== Ghost towns
== Townships
== Unorganized territory
=Richland
Politics
Union County voters were more politically centered in times past, but the county has selected the Republican Party candidate in every national election since 2000 (as of 2024).
See also
National Register of Historic Places listings in Union County, South Dakota
References
External links
Union County Historical Society website
2nd Best Place to Live in 2006 from the Progressive Farmer website
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- Union County, South Dakota
- List of counties in South Dakota
- Union Center, South Dakota
- Buffalo County, South Dakota
- Haakon County, South Dakota
- Union County
- Spink County, South Dakota
- Clay County, South Dakota
- Edmunds County, South Dakota
- Davison County, South Dakota
