County market report · FIPS 17181
Union County, IL
Outside a metro area · Population 16,498 (Census V2020 est.)
Typical value
$150,664
Sep 2026
1M
-0.4%
3M
-2.3%
12M
+0.2%
5Y
+10.8%
10Y
+14.1%
From peak
-4.2%
Peak $157,279 · Mar 2026
Rank US / state
2365 / 90
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-OnlyB · Early Warning
r3-2.28%p3-1.97%Acceleration-0.32ppMonths persisting5Evidence (Price-Only)65/100
Inventory, sales & days on market — Phase 2
Supply and demand confirmation is not yet available.
Yearly values (December)
| Year | ZHVI (Dec) | YoY change |
|---|---|---|
| 2025 | $154,696 | +4.4% |
| 2024 | $148,197 | +1.1% |
| 2023 | $146,617 | +6.1% |
| 2022 | $138,211 | +3.8% |
| 2021 | $133,088 | +0.9% |
| 2020 | $131,869 | +0.4% |
| 2019 | $131,350 | +6.5% |
| 2018 | $123,311 | -4.8% |
| 2017 | $129,471 | -1.7% |
| 2016 | $131,694 | — |