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The median home value in Union County, SD is $363,886 as of 2026-07-31, up 3.54% from a year earlier.
Median Home Value
$363,886
Year-over-Year
+3.54%
National Rank
#594 of 3071
Union County ranks 6th out of 50 counties in SD by median home price, and is +55.3% above the U.S. national median of $234,352. Within SD, the typical county has a median home value of $262,556, making Union County +38.6% above the SD state median.
Households here earn a median of $89,636 a year against a typical home value of $363,886 — a price-to-income ratio of 4.1×, above the 3× level usually considered comfortable, but below 5×. That is less affordable than roughly 64% of U.S. counties. (How this is calculated.)
The median home value in Union County is $363,886. That's up 3.54% from a year earlier. That is about 55.3% above the U.S. national county median of $234,352, and makes Union County the 6th most expensive of 50 counties in South Dakota.
Median household income here is $89,636, so a typical home costs about 4.1× annual household earnings — moderately expensive compared with other U.S. counties.
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