Union Center, SD demographics:
population, income, and more

Total population
487
-18.7% year-over-year change
Median household income
$53,750/yr
-7.1% year-over-year change
Housing units
200
9.3% year-over-year change

Union Center population

How many people live in Union Center

Union Center is home to 487 residents, according to the most recent Census data. Gender-wise, 54.6% of Union Center locals are male, and 45.4% are female.

Total population
487
-18.7% year-over-year change
Gender ratio
Male
54.6%
266
Female
45.4%
221
Value Percent YoY change
Male 266 54.6% -18.1%
Female 221 45.4% -19.3%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Union Center is 37, with the population distributed as follows: about 17.9% are children under 15, then 20.3% are in the 15 to 24 age group. Adults between 25 and 44 make up 45% of the population, while another 12.3% fall into the 45 to 64 bracket. Finally, around 4.5% are 65 or older.

Median age
36.7
Age breakdown
Under 15
17.9%
15 to 24
20.3%
25 to 44
45%
45 to 64
12.3%
Over 65
4.5%
Value Percent YoY change
Under 15 87 17.9% -47.6%
15 to 24 99 20.3% 32.0%
25 to 44 219 45% -9.1%
45 to 64 60 12.3% -36.8%
Over 65 22 4.5% 0.0%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

There’s also a share of 16.6% that includes residents with two or more races.

Citizenship
U.S.-born citizens
100%
Non-U.S.-born citizens
0%
Non-citizens
0%
Value Percent YoY change
U.S.-born citizens 487 100% -18.7%
Racial breakdown
White
80.1%
Black or African American
0%
American Indian and Alaska Native
0%
Asian
0%
Native Hawaiian and other Pacific Islander
0%
Two or more races
16.6%
Other
3.3%
Value Percent
White 390 80.1%
Two or more races 81 16.6%
Other 16 3.3%

Households in Union Center

A peek inside Union Center households

Union Center has 200 households, with an average of 2 members in each. Of these, 61% are families, while the remaining 39% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
200
9.3% year-over-year change
Average people per household
2
Non-family households
78
Family households
122
Value Percent YoY change
Non-family households 78 39% 151.6%
Family households 122 61% -19.7%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Union Center

The housing landscape of Union Center

Union Center's housing consists of 200 units, with 58% being detached single-family homes ideal for those wanting space. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 42% of the housing landscape.

Housing units
200
9.3% year-over-year change
Housing types
Value Percent
1 unit, detached 116 58%
Mobile home 84 42%
Homes built since 2020
% year-over-year change

The age of buildings in Union Center

In Union Center, the median construction year is 1974. About 4.5% of homes were built before the 1940s, with another 1% going up by 1949. Most development happened in the second half of the 20th century.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 9 4.5% 0.0%
Built between 1940 and 1949 2 1% 0.0%
Built between 1950 and 1959 82 41% 22.4%
Built between 1970 and 1979 16 8% -20.0%
Built between 1980 and 1989 9 4.5% -57.1%
Built between 1990 and 1999 82 41% 148.5%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Union Center occupancy rates

Out of the 200 occupied housing units in Union Center, 44.5% are owner-occupied, while 55.5% are lived in by tenants.

Occupied housing units
200
9.3% year-over-year change
Occupancy breakdown
Renter occupied
111
Owner occupied
89
Value Percent YoY
change
Renter occupied 111 55.5% 82.0%
Owner occupied 89 44.5% -27.1%
Unoccupied housing units
0.0%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Union Center housing costs

Housing costs in Union Center come to a median of $589 per month, while tenants specifically pay a median gross rent of $952.

Median housing costs per month
$589/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Union Center
$952/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Union Center

Union Center education at a glance

About 50.1% of the population in Union Center went to high school, while 5.5% pursued college studies. Another 16% earned an associate degree and 28.4% hold a bachelor’s.

Education level
Value Percent YoY change
High school diploma 191 50.1% 7.3%
College diploma 21 5.5% 5.0%
Associate degree 61 16% 24.5%
Bachelor's degree 108 28.4% -34.1%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Union Center

How much people earn in Union Center

The average annual household income in Union Center was $51,385 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -16.8% change from the previous year. At the same time, the median income stood at $53,750, reflecting a -7.1% shift over the same period.

Average household income in Union Center
$51,385/year
-16.8% year-over-year change
Median household income in Union Center
$53,750/year
-7.1% year-over-year change

Union Center income by age

In Union Center, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $59,083. Overall, 86.4% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $59,083 1.5%
Above poverty level
421
Below poverty level
66
Value Percent YoY
change
Above poverty level 421 86.4% -1.4%
Below poverty level 66 13.6% -61.6%

Employment in Union Center

Workforce and job types in Union Center

72.1% of the working population are employed in professional or administrative positions, while 27.9% are in hands-on or service-based jobs. Also, 44.8% run their own businesses, 24.9% are employed by private companies, and 27.9% work in the public sector.

Workforce demographics

White collar
217
Blue collar
84
Value Percent YoY change
White collar 217 72.1% -20.8%
Blue collar 84 27.9% 64.7%
Employer type
Self employees
44.8%
Private companies
24.9%
Governmental workers
27.9%
Not for profit companies
2.3%
Value Percent YoY change
Self employees 135 44.8% -32.2%
Private companies 75 24.9% 158.6%
Governmental workers 84 27.9% 15.1%
Not for profit companies 7 2.3% -70.8%

Transportation in Union Center

How people get around in Union Center

Commuting methods vary: 66.3% of residents travel by personal vehicle and 33.7% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 124 66.3% -6.8%
Walk 63 33.7% 293.8%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Union Center by zipcode?

Zipcode Population Number of households Median income Average income
57787 487 200 $53,750 $51,385

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FAQs about Union Center demographics 

What is the total population of Union Center?

Union Center has a total population of 487 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -18.7% compared to a year ago.

What is the gender ratio in Union Center?

The gender ratio in Union Center is as follows:
  • 54.6% males (266 residents)
  • 45.4% females (221 residents)

What is the median age in Union Center?

The median age in Union Center is 36.7.

What is the age distribution of the population in Union Center?

The age distribution in Union Center is as follows:
  • Under 15: 17.9% (87 residents)
  • Ages 15-24: 20.3% (99 residents)
  • Ages 25-44: 45% (219 residents)
  • Ages 45-64: 12.3% (60 residents)
  • Over 65: 4.5% (22 residents)

What is the racial and ethnic makeup of Union Center?

The racial and ethnic makeup of Union Center is as follows:
  • White: 80.1% (390 residents)
  • Black or African American: 0% ( residents)
  • American Indian and Alaska Native: 0% ( residents)
  • Asian: 0% ( residents)
  • Native Hawaiian and Other Pacific Islander: 0% ( residents)
  • Two or More Races: 16.6% (81 residents)
  • Other: 3.3% (16 residents)

What percentage of the population in Union Center are U.S.-born citizens?

U.S.-born citizens represent 100% of the population in Union Center.

How many housing units are there in Union Center?

There are 200 housing units in Union Center, reflecting a +9.3% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Union Center and what is the average household size?

Union Center has a total of 200 households, with an average of 2 people in each.

What is the median household income in Union Center?

Union Center has a median household income of $53,750, representing a -7.1% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Union Center?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 72.1% (217 residents)
  • Blue-collar workers: 27.9% (84 residents)

Places of employment:
  • Self-employed: 44.8% (135 residents)
  • Private companies: 24.9% (75 residents)
  • Governmental workers: 27.9% (84 residents)
  • Not-for-profit companies: 2.3% (7 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025