County market report · FIPS 17125
Mason County, IL
Outside a metro area · Population 13,173 (Census V2020 est.)
Typical value
$105,470
Sep 2026
1M
+2.0%
3M
+3.3%
12M
+15.7%
5Y
+10.7%
10Y
+12.8%
From peak
0.0%
Peak $105,470 · Sep 2026
Rank US / state
10 / 1
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-OnlyC · Accelerating Uptrend
r3+3.31%p3+0.19%Acceleration+3.12ppMonths persisting1Evidence (Price-Only)61/100
Inventory, sales & days on market — Phase 2
Supply and demand confirmation is not yet available.
Yearly values (December)
| Year | ZHVI (Dec) | YoY change |
|---|---|---|
| 2025 | $98,087 | +9.9% |
| 2024 | $89,225 | +3.5% |
| 2023 | $86,231 | -5.0% |
| 2022 | $90,792 | -6.1% |
| 2021 | $96,735 | +4.2% |
| 2020 | $92,806 | +8.5% |
| 2019 | $85,525 | +4.9% |
| 2018 | $81,532 | +0.1% |
| 2017 | $81,420 | -12.3% |
| 2016 | $92,839 | -1.7% |
| 2015 | $94,490 | +0.8% |
| 2014 | $93,713 | +6.0% |
| 2013 | $88,419 | +7.1% |
| 2012 | $82,549 | — |