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.
- Cheapest Counties to Buy a House
- Counties With the Lowest Monthly Housing Payment
- Counties With the Lowest Property Tax
- Counties With the Cheapest Homeowners Insurance
- Counties With the Cheapest Childcare
- Safest Counties From Natural Disasters
- Counties With the Lowest Flood Risk
- Counties With the Lowest Wildfire Risk
- Safest Counties (Lowest Violent Crime)
- Counties With the Best School Ratings
- Counties With the Highest Household Income
- Counties With the Shortest Commute
- Counties Where Homes Sell Fastest
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.