In Union, South Dakota, the median home price is $363,556, compared with the South Dakota median of $314,684; median household income is $89,636; the population is 17,081; schools rate 6.6 out of 10; the violent crime rate is 124.6 per 100k; and the average commute is 17.7 minutes. Sources: Zillow Research and the US Census Bureau.
Data updated June 2026 - Source: Zillow Research
Union at a glance
Population
17,081
Median Household Income
$89,636
Typical Home Value
$363,556
School District Rating
6.6
Violent Crime Rate
124.6
Avg Commute Time
17.7
About Union
Union has a population of 17,081. The median home value is $363,556, 16% above the South Dakota median. Median household income is $89,636 (19% above the South Dakota median). The most populated towns are Big Sioux, North Sioux, and Elk Point.
Data comes from public sources including the U.S. Census Bureau, the National Center for Education Statistics, the FBI, the EPA, Zillow, and Redfin. Source attribution is shown on each metric.
Towns in Union
18 towns, by population.
- Big Sioux4,917 pop.
- North Sioux City3,045 pop.
- Elk Point2,537 pop.
- Beresford1,869 pop.
- Jefferson1,088 pop.
- Alcester989 pop.
- Jefferson554 pop.
- Virginia315 pop.
- Spink270 pop.
- Brule254 pop.
- Big Springs237 pop.
- Civil Bend191 pop.
- Richland175 pop.
- Prairie155 pop.
- Alcester142 pop.
- Emmet140 pop.
- Sioux Valley112 pop.
- Elk Point91 pop.
County rankings in South Dakota
Every county in South Dakota, ranked on one decision metric at a time.
- 01Cheapest home pricesCheapest Counties to Buy a House in South Dakota
- 02Lowest monthly housing paymentCounties With the Lowest Monthly Housing Payment in South Dakota
- 03Lowest property taxLowest Property Taxes in South Dakota by County
- 04Cheapest homeowners insuranceCounties With the Cheapest Homeowners Insurance in South Dakota
- 05Cheapest childcare costCounties With the Cheapest Childcare in South Dakota
- 06Lowest natural disaster riskLowest Natural Disaster Risk Counties in South Dakota
- 07Lowest flood riskLowest Flood Risk Counties in South Dakota
- 08Lowest wildfire riskLowest Wildfire Risk Counties in South Dakota
- 09Safest countiesSafest Counties (Lowest Violent Crime) in South Dakota
- 10Best school ratingsSouth Dakota School Rankings by County
- 11Highest household incomeCounties With the Highest Household Income in South Dakota
- 12Shortest commute timeCounties With the Shortest Commute in South Dakota
- 13Fastest-selling homesCounties Where Homes Sell Fastest in South Dakota
Union at a glance: frequently asked questions
- What is the population of Union?
- Union has a population of 17,081 based on the most recent US Census estimate.
- What is the median home price in Union?
- The median home value in Union is $363,556. Open the interactive map to see the distribution town by town.
- What is the median household income in Union?
- Median household income in Union is $89,636 per year, sourced from the US Census American Community Survey.
- What state is Union in?
- Union is in South Dakota.
- How many towns are in Union?
- Union contains 18 towns and municipalities. Click any town below or on the map to see its housing, school, and crime data.
Compare Union with other places
Put up to four states, counties, towns, or ZIPs side by side on income, housing, crime, education, and more.
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