County profile

Union County

South Dakota · ACS 2020–2024

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Latest estimates

At a glance

U.S. Census Bureau American Community Survey 5-year estimates.

Total population
17,081
Median household income
$89,636
People below poverty
6.2%
Median home value
$301,100

Income

The median income of households in Union County, South Dakota was $89,636. An estimated 5.1% of households had income below $10,000 a year and 13.1% had income of $200,000 or more.

Household Income in Union County, South Dakota in 2020-2024

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Percent
Less than $10,000 5.1
$10,000 to $14,999 1.3
$15,000 to $24,999 4.7
$25,000 to $34,999 3.2
$35,000 to $49,999 11.3
$50,000 to $74,999 14.4
$75,000 to $99,999 16.6
$100,000 to $149,999 19
$150,000 to $199,999 11.2
$200,000 or more 13.1

Median Earnings for Full-Time Year-Round Workers by Sex in Union County, South Dakota in 2020-2024

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Dollars
Male 69378
Female 57247

An estimated 79.2% of households received earnings. An estimated 30.4% of households received Social Security and an estimated 24.3 % of households received retirement income other than Social Security. The average income from Social Security was $24,656. These income sources are not mutually exclusive; that is, some households received income from more than one source.

Proportion of Households with Various Income Sources in Union County, South Dakota in 2020-2024

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Percent
Earnings 79.2
Social Security 30.4
Retirement income 24.3
Supplemental Security Income (SSI) 2.7
Cash public assistance income 0.9

Poverty and Participation in Government Programs

In 2020-2024, 6.2 % of people were in poverty. An estimated 3.3% of children under 18 were below the poverty level, compared with 11.6% of people 65 years old and over. An estimated 5.6% of people 18 to 64 years were below the poverty level.

Poverty Rates in Union County, South Dakota in 2020-2024

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Percent
People in poverty 6.2
Children under 18 years below poverty 3.3
People 65 years old and over below poverty 11.6
People 18 to 64 years below poverty 5.6

In 2020-2024, 4.1 % of households received SNAP (the Supplemental Nutrition Assistance Program). An estimated 34.3% of households that received SNAP had children under 18, and 37% of households that received SNAP had one or more people 60 years and over. An estimated 28.1% of all households receiving SNAP were families with a female householder and no spouse present.


Among the civilian noninstitutionalized population in Union County, South Dakota in 2020-2024, 94.9% had health insurance coverage and 5.1% did not have health insurance coverage. Private coverage was 81.6% and public coverage was 26.4%, respectively. The percentage of children under the age of 19 with no health insurance coverage was 4.4%.


In 2020-2024, Union County, South Dakota had a total population of 17,081 - 8,269 (48.4%) females and 8,812 (51.6%) males. The median age was 41.5 years. An estimated 24.1% of the population was under 18 years, 30% was 19 to 44 years, 24.6% was 45 to 64 years, and 19.5 % was 65 years and older.

Population by Age and Sex for Union County, South Dakota in 2020-2024

Male Female
Under 5 431 438
5 to 9 667 430
10 to 14 670 704
15 to 19 636 456
20 to 24 421 386
25 to 29 498 428
30 to 34 578 548
35 to 39 549 465
40 to 44 659 592
45 to 49 537 498
50 to 54 496 442
55 to 59 585 577
60 to 64 498 564
65 to 69 683 545
70 to 74 355 499
75 to 79 254 241
80 to 84 218 176
85 and over 77 280

Hispanic Origin and Race

For people reporting one race alone, 90% were White; 0.9% were Black or African American; 5% were American Indian and Alaska Native; 1.1% were Asian; 0.6% were Native Hawaiian and Other Pacific Islander, and 0% were Some Other Race. An estimated 6.2% reported Two or More Races. An estimated 4.8% of the people in Union County, South Dakota were Hispanic or Latino. An estimated 88.4% of the people in Union County, South Dakota were White alone, non-Hispanic. People of Hispanic origin may be of any race.


Households and Families

In 2020-2024, there were 7,310 households in Union County, South Dakota. The average household size was 2.32 people.

Married-couple households made up 59.4% of the households in Union County, South Dakota while cohabiting couple households made up 7.4% of households. Female householders with no spouse or partner present were 18.9% of all households, while 14.3% of households had male householders with no spouse or partner present. Some households had one person, as 12.4% of households were male householders living alone, and 12.4% were female householders living alone, for a total of 24.8% of all households.

In Union County, South Dakota, 29.8% of all households had one or more people under the age of 18; 31.4% of all households had one or more people 65 years and over.

Types of Households in Union County, South Dakota in 2020-2024

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Percent
Married-couple households 59.4
Cohabiting Couples 7.4
Male Householder
No spouse/partner present
14.3
Female Householder
No spouse/partner present
18.9

Marital Status

Among persons 15 and older, 62.5% of males and 64.8% of females were currently married.

Population 15 years and over Percent
Males
Percent
Females
Never married 27.5 18.9
Now married, except separated 62.5 64.8
Separated 0.8 0.7
Widowed 2.5 7.9
Divorced 6.7 7.7

Grandparents and Grandchildren

In Union County, South Dakota, 95 grandparents lived with their grandchildren under 18 years old. Of those grandparents, 66.3% were responsible for the basic needs of their grandchildren.


Nativity and Foreign-Born

In 2020-2024, an estimated 98% of the people living in Union County, South Dakota were U.S. natives. 25.8% of the Union County, South Dakota population were living in the state where they were born.

Approximately 2% of Union County, South Dakota residents in 2020-2024 were foreign-born. 32.7% of foreign-born were naturalized U.S. citizens and an estimated 34.8 % entered the country before the year 2010.

Foreign-born residents of Union County, South Dakota come from different parts of the world. The bar graph below displays the percentage of foreign-born from each world region of birth in 2020-2024 for Union County, South Dakota.

Region of Birth for the Foreign-Born Population in Union County, South Dakota in 2020-2024

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Percent
Latin America 24.3
Asia 49.1
Europe 24.3
Africa 2.3
Northern America 0
Oceania 0

Language

Among people at least five years old living in Union County, South Dakota in 2020-2024, 3 % spoke a language other than English at home. Spanish was spoken by 1.5% of people at least five years old; 0.7% reported that they did not speak English "very well."

Percentage of the Population 5 years and over who Speak a Language other than English in Union County, South Dakota in 2020-2024

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Percent
Spanish 1.5
Other Indo-European languages 1
Asian and Pacific Islander languages 0.4
Other languages 0.1

Geographic Mobility

In 2020-2024, 88.6 % of the people at least one year old living in Union County, South Dakota were living in the same house one year earlier.

Geographic Mobility of Residents of Union County, South Dakota in 2020-2024

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Percent
Same house 88.6
Different house, same county 4.2
Different county, same state 2.2
Different state 4.8
Abroad 0.2

Education

In 2020-2024, 95.7 % of people 25 years and over had at least graduated from high school and 37% had a bachelor's degree or higher. An estimated 4.4% did not complete high school.

The total school enrollment in Union County, South Dakota was 3,829 in 2020-2024. Nursery school enrollment was 280 and kindergarten through 12th grade enrollment was 3,107. College or graduate school enrollment was 442.

Educational Attainment of People in Union County, South Dakota in 2020-2024

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Percent
Less than high school diploma 4.4
High school diploma or equivalency 26.2
Some college, no degree 19.8
Associate's degree 12.7
Bachelor's degree 23.7
Graduate or professional degree 13.3

Disability

In Union County, South Dakota, among the civilian noninstitutionalized population in 2020-2024, 10.8 % reported a disability. The likelihood of having a disability varied by age - from 7.8% of people under 18 years old, to 7.5% of people 18 to 64 years old, and to 24% of those 65 and over.


Employment Status and Type of Employer

In Union County, South Dakota, 66 % of the population 16 and over were employed; 31.6% were not currently in the labor force.

An estimated 80.9% of the people employed were private wage and salary workers; 11.1% were federal, state, or local government workers; and 8 % were self-employed in their own (not incorporated) business.

Class of worker Number Percent
Private wage and salary workers 7,240 80.9
Federal, state, or local government workers 989 11.1
Self-employed workers in own not incorporated business 718 8

Industries

In 2020-2024, the civilian employed population 16 years and older in Union County, South Dakota worked in the following industries:

Percent by Industry in Union County, South Dakota in 2020-2024

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Percent
Agriculture, forestry, fishing and hunting, and mining 6.2
Construction 9.6
Manufacturing 13.6
Wholesale trade 2.8
Retail trade 9.8
Transportation and warehousing, and utilities 5.8
Information 1.3
Finance and insurance, and real estate and rental and leasing 7.5
Professional, scientific, and management, and administrative and waste management services 8.9
Educational services, and health care and social assistance 23.4
Arts, entertainment, and recreation, and accommodation, and food services 4.5
Other Services, except public administration 3.4
Public administration 3.3

Occupations

Occupations for the Civilian Employed Population 16 Years and over in Union County, South Dakota in 2020-2024

Civilian employed population 16 years and over Number Percent
Management, business, sciences, and arts occupations 4,039 45.1
Service occupations 960 10.7
Sales and office occupations 1,835 20.5
Natural resources, construction, and maintenance occupations 903 10.1
Production, transportation, and material moving occupations 1,210 13.5

Commuting to Work

An estimated 82.6% of Union County, South Dakota workers drove to work alone in 2020-2024, and 6.8% carpooled. Among those who commuted to work, it took them on average 17.7 minutes to get to work.

Percent of Workers 16 and over Commuting by Mode in Union County, South Dakota in 2020-2024

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Percent
Car, truck, van -- drove alone 82.6
Car, truck, van -- carpooled 6.8
Public transportation (excluding taxicab) 0
Walked 1.3
Other means 1.4
Worked from home 7.9

In 2020-2024, Union County, South Dakota had a total of 7,588 housing units. Of these housing units, 74.8% were single-family houses either not attached to any other structure or attached to one or more structures (commonly referred to as "townhouses" or "row houses"). 20.7% of the housing units were located in multi-unit structures, or those buildings that contained two or more apartments. 4.2% were mobile homes, while any remaining housing units were classified as "other," which included boats, recreational vehicles, vans, etc.

Types of Housing Units in Union County, South Dakota in 2020-2024

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Percent
Single-family houses 74.8
Apartments in multi-unit structures 20.7
Mobile homes 4.2
Boat, RV, van, etc 0.3

17.3% of the housing inventory was comprised of houses built since 2010, while 16% of the houses were first built in 1939 or earlier. The median number of rooms in all housing units in Union County, South Dakota was 6.5 rooms, and of these housing units 67.4% had three or more bedrooms.


In 2020-2024, Union County, South Dakota had 7,310 housing units that were occupied or had people living in them, while the remaining 278 were vacant. Of the occupied housing units, the percentage of these houses occupied by owners (also known as the homeownership rate) was 73.1% while renters occupied 26.9%. The average household size of owner-occupied houses was 2.52 and in renter-occupied houses it was 1.78.

4.6% of householders of these occupied houses had moved into their house since 2021, while 5.8% moved into their house in 1989 or earlier. Households without a vehicle available for personal use comprised 3.7% and another 35.3% had three or more vehicles available for use.

The following chart provides the primary fuel used to heat houses in Union County, South Dakota:

House Heating Fuel Used in Union County, South Dakota in 2020-2024

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Percent
Gas 64.1
Electricity 33.4
Fuel oil, kerosene, etc 0.3
All other fuels 1.5
No fuel used 0.7

In 2020-2024, the median property value for owner-occupied houses in Union County, South Dakota was $301,100.

Of the owner-occupied households, 60.5 % had a mortgage. 39.5% owned their houses "free and clear," that is without a primary mortgage or loan on the house. The median monthly housing costs for owners with a mortgage was $1,758 and for owners without a mortgage it was $735.

For renter-occupied houses, the median gross rent for Union County, South Dakota was $1,069. Gross rent includes the monthly contract rent and any monthly payments made for electricity, gas, water and sewer, and any other fuels to heat the house.