Home › Counties › Mercer County, IL
The median home value in Mercer County, IL is $172,189 as of 2026-08-31, up 7.85% from a year earlier.
Median Home Value
$172,189
Year-over-Year
+7.85%
National Rank
#2319 of 3071
Mercer County ranks 40th out of 102 counties in IL by median home price, and is -26.8% below the U.S. national median of $235,072. Within IL, the typical county has a median home value of $158,585, making Mercer County +8.6% above the IL state median.
The typical home value increased by 1.7%, from $169,283 in May 2026 to $172,189 in Aug 2026.
Monthly Zillow Home Value Index snapshots retained by HomePriceMap. A short history is shown now and grows automatically as each new monthly release arrives.
| Month | Typical home value | Year-over-year change |
|---|---|---|
| May 2026 | $169,283 | +8.7% |
| Jun 2026 | $173,161 | +8.2% |
| Jul 2026 | $175,928 | +7.9% |
| Aug 2026 | $172,189 | +7.8% |
Households here earn a median of $74,182 a year against a typical home value of $172,189 — a price-to-income ratio of 2.3×, comfortably below the 3× income level generally considered manageable. That is less affordable than roughly 9% of U.S. counties. (How this is calculated.)
The median home value in Mercer County is $172,189. That's up 7.85% from a year earlier. That is about 26.8% below the U.S. national county median of $235,072, and makes Mercer County the 40th most expensive of 102 counties in Illinois.
Median household income here is $74,182, so a typical home costs about 2.3× annual household earnings — relatively affordable compared with other U.S. counties.
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