County market report · FIPS 46127
Union County, SD
Sioux City, IA-NE-SD · Population 16,192 (Census V2020 est.)
Typical value
$355,956
Sep 2026
1M
-0.1%
3M
+0.0%
12M
+2.7%
5Y
+21.4%
10Y
+63.3%
From peak
-0.1%
Peak $356,196 · Aug 2026
Rank US / state
1594 / 30
by 12M change
Zillow Home Value Index
Source: Zillow Home Value Index (ZHVI), all homes, smoothed & seasonally adjusted · data through Sep 2026.
Inflection signal
Price-OnlyNo active signal this month.
Inventory, sales & days on market — Phase 2
Supply and demand confirmation is not yet available.
Yearly values (December)
| Year | ZHVI (Dec) | YoY change |
|---|---|---|
| 2025 | $353,004 | +3.8% |
| 2024 | $339,955 | +3.3% |
| 2023 | $329,023 | -0.3% |
| 2022 | $330,059 | +9.7% |
| 2021 | $300,922 | +11.5% |
| 2020 | $269,931 | +6.2% |
| 2019 | $254,217 | +9.1% |
| 2018 | $233,111 | +0.8% |
| 2017 | $231,152 | +5.4% |
| 2016 | $219,312 | +4.1% |
| 2015 | $210,670 | +6.5% |
| 2014 | $197,732 | +4.4% |
| 2013 | $189,381 | +3.6% |
| 2012 | $182,792 | +4.7% |
| 2011 | $174,668 | +0.1% |
| 2010 | $174,556 | +0.7% |
| 2009 | $173,331 | — |