Union County, SD Housing Market
The median sale price of a home in Union County was $289K last month, down 22.9% since last year. The median sale price per square foot in Union County is $162, up 3.8% since last year.
Union County Housing Market Trends
In September 2025, Union County home prices were down 22.9% compared to last year, selling for a median price of $289K. On average, homes in Union County sell after 21 days on the market compared to 67 days last year. There were 13 homes sold in September this year, down from 19 last year.

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View houses in Union County that sold recently
Recently sold homes
- $670,000 Last Sold Price5 beds3 baths3,834 sq ft800 Lakeshore Dr, North Sioux City, SD 57049List Price$670,000Sale to List0% over listDays on Market196 days800 Lakeshore Dr, North Sioux City, SD 57049
- $385,000 Last Sold Price3 beds3 baths3,260 sq ft410 S 6th St St, Beresford, SD 57004List Price$392,500Sale to List2% under listDays on Market84 days410 S 6th St St, Beresford, SD 57004
- $310,000 Last Sold Price4 beds2 baths2,834 sq ft209 S 3rd St St, Beresford, SD 57004List Price$310,000Sale to List0% over listDays on Market183 days209 S 3rd St St, Beresford, SD 57004
- $315,000 Last Sold Price5 beds1.5 baths2,112 sq ft47144 324 St, Elk Point, SD 57025List Price$339,900Sale to List7% under listDays on Market81 days47144 324 St, Elk Point, SD 57025
- $630,000 Last Sold Price3 beds2.5 baths2,818 sq ft30403 477th Ave Ave, Alcester, SD 57001List Price$639,000Sale to List1% under listDays on Market64 days30403 477th Ave Ave, Alcester, SD 57001
- $7,000 Last Sold Price—beds—baths—sq ft1724 Whitcher Ave, Sioux City, IA 51109List Price$7,000Sale to List0% over listDays on Market98 days1724 Whitcher Ave, Sioux City, IA 51109
- $475,000 Last Sold Price3 beds3 baths2,164 sq ft13 Edgewater Ln, North Sioux City, SD 57049List Price$470,000Sale to List1% over listDays on Market264 days13 Edgewater Ln, North Sioux City, SD 57049
- $244,000 Last Sold Price4 beds3 baths2,140 sq ft207 W 3rd St, Beresford, SD 57004List Price$247,300Sale to List1% under listDays on Market200 days207 W 3rd St, Beresford, SD 57004
See all recently sold homes in Union County.
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Schools in Union County
- Elementary
- Middle
- High
GreatSchools Rating
7/10 Beresford Elementary - 02 Public • K-5 | 307 Students | 3 reviews |
6/10 Ponca Elementary School Public • 3-6 | 125 Students | N/A |
6/10 Alcester-Hudson Elementary - 04 Public • PreK-6 | 195 Students | 1 reviews |
6/10 Akron Westfield Elementary School Public • K-5 | 249 Students | 1 reviews |
6/10 Dakota Valley Upper Elementary - 04 Public • 4-5 | 232 Students | 1 reviews |
Climate's impact on Union County housing
Learn about natural hazards and environmental risks, such as floods, fires, wind, and heat that could impact homes in Union County.
Flood Factor - Moderate
Flood Factor

Fire Factor - Moderate
Fire Factor

Wind Factor - Minor
Wind Factor

Heat Factor - Moderate
Heat Factor

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