Real estate · County · South Dakota
Real estate businesses in Union County, SD
How Union County, SD compares with other counties and the U.S. for real estate businesses: competitors, household spending, official counts and growth.
Groundwork market score · out of 100
Score 52 out of 100: Upper middle
Ranked #978 of 2,229 scored counties
#2 of 17 scored counties in South Dakota
- Listings
- 15
- 0 chain locations (0%)
- Official establishments
- 16
- Businesses with payroll, 2023
- Household spending a year
- $110.9M
- On rent and homeowner costs · $15,168 a household
- Housing spending per listing (U.S. = 100)
- 171
- 71% above the U.S.
- Listings per 10k households
- 20.5
- 47% below the U.S.
- Population, 2025
- 17,402
- +3.3% since 2020
See the real estate businesses around any address in Union County
The site report maps the real estate businesses on map listings near the address, by name and distance, and sizes the households and spending around it. Or open the report at the center of Union County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardSurvey estimates 2020–2024 · population estimates 2025 · official business counts 2023 · map listings September 2026 · Data credits · How we measure
What this means
At $15,168 per household (9% below the U.S. average), households in Union County spend about $110.9M a year on rent and homeowner costs. Housing spending per office is 71% above the U.S. figure. The spending figure is all rent and homeowner costs, a measure of housing demand, not money real estate businesses take in.
Union County has 15 real estate businesses on map listings as of September 2026. None of them are chain locations, against 6% across the U.S. Per 10,000 households, that is 20.5, 47% below the U.S. rate of 38.5.
The official count of businesses with payroll classed as real estate agents, property managers, mortgage lenders and inspectors in Union County was 16 in 2023. That is one for every 457 households, against one for every 414 across the U.S. Official counts also show 91 one-person businesses without payroll.
Population estimates show Union County grew 3.3% from 2020 to 2025, in step with the U.S. (+3.1%). The Groundwork market score for real estate businesses in Union County is 52 (upper middle), #978 of 2,229 scored counties and #2 of 17 scored counties in South Dakota.
How Union County compares
The same measures for South Dakota and the whole U.S. Housing spending per listing divides all rent and homeowner costs by the listings counted: a measure of housing demand for each business, not money any of them take in, so it is shown against the U.S. (100) only. Households per establishment divides households by the official count.
| Measure | Union County | South Dakota | U.S. |
|---|---|---|---|
| Listings per 10k households | 20.5 | 32.7 | 38.5 |
| Housing spending per listing (U.S. = 100) | 171 | 98 | 100 |
| Households per official establishment | 457 | 487 | 414 |
| Official establishment growth, 2019–2023 | n/a | +29.3% | +15.8% |
| Population growth, 2020–2025 | +3.3% | +5.3% | +3.1% |
| Spending per household on rent and homeowner costs | $15,168 | $13,945 | $16,661 |
| Median household income | $89,636 | $75,081 | $80,734 |
| Groundwork market score | 52 | 43 |
Official counts and lending
Businesses
- Official establishments, 2019 to 2023
- 11 → 16
- Employees, 2023
- 68
- Annual payroll, 2023
- $3.4M
- One-person businesses, 2023
- 91Businesses with no payroll
- Map listings, September 2026
- 150 chain locations
- Listings at the U.S. rate for this spending
- 26The U.S. ratio of listings to household spending, applied here
SBA-backed loans since fiscal 2022
- Loans
- 0
- Amount
- $0
SBA-backed loans to businesses classed as real estate agents, property managers, mortgage lenders and inspectors in Union County, through June 2026, placed by the borrower’s ZIP code. Official establishments are businesses with payroll; the official counts leave out places with fewer than 3.
Population and households in Union County
- Population, 2025 estimate
- 17,402+3.3% since 2020
- Households
- 7,310
- Median age
- 40.9
- Homes lived in by their owners
- 73%
- Vehicles per household
- 2.2
- Land area
- 462 sq. mi.
- People per square mile
- 37
- Median household income
- $89,636+27.4% vs. 2015–2019, before inflation
- Average household income
- $124,814
- Median home value
- $301,100
- Jobs located here
- 9,648
- Daytime population
- 19,509Residents who don’t work, plus everyone whose job is here
Looking at a specific site in Union County?
These figures cover the whole county. A site report draws rings around one address and counts what’s inside them: households, spending, jobs, and the real estate businesses on map listings by name and distance.
Or open the report at the center of Union County. Signed out, you see a blurred preview; on an account, each report is one action.
Free10 actions over 3 days, no cardReal estate across South Dakota
Every South Dakota market ranked →The highest-scoring counties in South Dakota for real estate businesses, numbered among those based in South Dakota, with Union County marked.
Top counties in South Dakota
| Market | Score | Listings | Per 10k households | Housing spending per listing (U.S. = 100) | Population growth | U.S. rank |
|---|---|---|---|---|---|---|
| 1Yankton County, SD | 59 | 16 | 16.5 | 191 | +1.5% | #620 of 2,229 |
| 2Union County, SD | 52 | 15 | 20.5 | 171 | +3.3% | #978 of 2,229 |
| 3Hughes County, SD | 49 | 19 | 26.2 | 126 | −0.9% | #1,144 of 2,229 |
| 4Meade County, SD | 48 | 24 | 20.1 | 162 | +2.7% | #1,171 of 2,229 |
| 5Butte County, SD | 48 | 12 | 27.9 | 115 | +5.5% | #1,191 of 2,229 |
| 6Beadle County, SD | 45 | 15 | 19.9 | 153 | +2.4% | #1,338 of 2,229 |
| 7Minnehaha County, SD | 45 | 249 | 29.4 | 112 | +7.6% | #1,354 of 2,229 |
| 8Roberts County, SD | 44 | 6 | 16.6 | 185 | −0.1% | #1,375 of 2,229 |
| 9Brookings County, SD | 41 | 45 | 32.6 | 96 | +9.6% | #1,577 of 2,229 |
| 10Lake County, SD | 38 | 12 | 25.4 | 128 | −0.2% | #1,726 of 2,229 |
Other business types in Union County
Each with its Groundwork market score here, out of 100, where it has one.
Food and drink
Groceries and convenience
Auto
Beauty and personal care
Fitness and classes
Health care
Child care
Clothing and laundry
Home services
Real estate
Funeral services
Questions
How many real estate businesses are in Union County, SD?
Map listings as of September 2026 show 15 real estate businesses in Union County. None of them are chain locations. The listings count real estate agents and brokers, property managers, mortgage brokers and lenders, and home inspectors. Official counts show 16 businesses with payroll classed as real estate agents, property managers, mortgage lenders and inspectors in 2023. Another 91 one-person businesses have no payroll, by official counts.
How much do households in Union County, SD spend on rent and homeowner costs?
About $110.9M a year, or $15,168 per household. That is 9% below the U.S. average (an index of 91, where 100 is the U.S. average). For the 15 real estate businesses on map listings, housing spending per office is 71% above the U.S. figure. That figure is all rent and homeowner costs, used as a measure of housing demand; it is not money real estate businesses take in. It is estimated from the incomes of the 7,310 households in Union County and national spending patterns by income.
How does Union County, SD compare with the U.S. for real estate businesses?
Union County has 20.5 real estate businesses per 10,000 households, 47% below the U.S. rate of 38.5. The index of housing spending per office is 171, where 100 is the U.S. At the U.S. ratio of real estate businesses to household spending, Union County would have about 26, against 15 on map listings. There is one business with payroll in the industry for every 457 households, against one for every 414 across the U.S.
How fast is Union County, SD growing?
Population estimates put Union County at 17,402 people in 2025, up 3.3% since 2020, in step with the U.S. (+3.1%). It has 7,310 households. Median household income in Union County is $89,636, 11% above the U.S. median of $80,734. Against the 2015–2019 survey, the median rose 27.4%, before inflation.
What is the Groundwork market score?
The Groundwork market score runs from 0 to 100 and compares a market with others of its kind for one business type: states with states, metro areas with metro areas, small-town markets and counties with their own. It weighs household spending per competitor (35%), households per business with payroll (25%), population growth (20%) and spending power (20%), each ranked against those peers. A higher score means that, taken together, the market has more household spending and more households for each business already there, faster population growth and more spending per household than similar markets. It describes a market, not any one site or deal. Union County scores 52 for real estate businesses (upper middle), #978 of 2,229 scored counties.
How can I see the market around a specific site?
Run a Groundwork site report on an address in Union County. It maps the real estate businesses on map listings near the site and sizes the households and spending within the distance you choose. New accounts get 10 actions over 3 days, no card.
How the score works · Top markets for real estate businesses · All 56 business types in Union County
Screening a site or an acquisition in Union County?
A site report maps the competitors on map listings near an address and sizes the households and spending around it.
The button opens the report at the center of Union County. Signed out, you see a blurred preview; on an account, each report is one action.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are estimates for research only. Not investment or real estate advice.