County market report · FIPS 17081
Jefferson County, IL
Mount Vernon, IL · Population 37,235 (Census V2020 est.)
Typical value
$147,115
Sep 2026
1M
+0.9%
3M
+0.4%
12M
+8.4%
5Y
+20.2%
10Y
-3.8%
From peak
-26.0%
Peak $198,892 · Jun 2015
Rank US / state
217 / 18
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 | $140,446 | +4.6% |
| 2024 | $134,250 | +0.9% |
| 2023 | $133,046 | +0.1% |
| 2022 | $132,878 | +7.5% |
| 2021 | $123,559 | +2.2% |
| 2020 | $120,876 | +1.4% |
| 2019 | $119,203 | +10.9% |
| 2018 | $107,499 | -8.3% |
| 2017 | $117,237 | -13.6% |
| 2016 | $135,673 | -29.4% |
| 2015 | $192,256 | +4.3% |
| 2014 | $184,292 | +7.9% |
| 2013 | $170,726 | +31.0% |
| 2012 | $130,311 | +15.1% |
| 2011 | $113,209 | -3.8% |
| 2010 | $117,647 | +2.5% |
| 2009 | $114,831 | — |