Union County, SD Housing Market Brief
county · SD · as of August 2026
What is Union County, SD’s Alpha Score?
The Alpha Score is a composite 0–100 index of market strength, a weighted blend of five dimensions. See the methodology.
Where is Union County, SD in its market cycle?
Union County, SD is classified as Growing — strengthening, with scores rising over recent months. This is a classification of recent (1–12 month) momentum, not a price forecast.
Union County, SD housing market data
| Metric | Value | YoY |
|---|---|---|
| Median Sale Price | $459K | ▲ +10.5% |
| Median Days on Market | 46 days | ▲ +206.7% |
| Months of Supply | 3.8 | ▲ +8.6% |
| Homes for Sale | 72 | ▼ -7.7% |
| Homes Sold | 20 | ▼ -13% |
| Median Price / Sq Ft | $166 | ▼ -0.6% |
How has Union County, SD’s Alpha Score moved?
Markets like Union County, SD
Frequently asked questions
Is Union County, SD a buyer's or seller's market?
As of August 2026, Union County, SD is classified as a Balanced Market, based on its Alpha Score of 53 out of 100. The classification reflects current price, inventory, affordability, economic, and rental-yield conditions.
Are home prices rising or falling in Union County, SD?
The median sale price in Union County, SD is $459K, having risen 10.5% over the past year.
How affordable is Union County, SD?
Union County, SD scores 26 out of 100 on affordability — relatively unaffordable relative to local incomes and prevailing mortgage rates compared with other counties.
What's driving Union County, SD's Alpha Score?
Union County, SD's strongest dimension is Economic Strength (80/100) and its weakest is Rental Yield (12/100). The Alpha Score is a weighted blend of all five dimensions.
Want the live, interactive view of Union County, SD? Open the full market dashboard — charts, ZIP-level drill-down, and watchlist tracking. Explore the map or read the methodology.