Jefferson County, IL Housing Market Brief
county · IL · as of July 2026
What is Jefferson County, IL’s Alpha Score?
The Alpha Score is a composite 0–100 index of market strength, a weighted blend of five dimensions. See the methodology.
Where is Jefferson County, IL in its market cycle?
Jefferson County, IL is classified as Mature — holding near a healthy peak. This is a classification of recent (1–12 month) momentum, not a price forecast.
Jefferson County, IL housing market data
| Metric | Value | YoY |
|---|---|---|
| Median Sale Price | $165K | ▲ +10% |
| Median Days on Market | 57 days | ▲ +11.8% |
| Months of Supply | 4.3 | ▲ +43.3% |
| Homes for Sale | 91 | ▲ +13.8% |
| Homes Sold | 21 | ▼ -22.2% |
| Median Price / Sq Ft | $107 | ▲ +4.2% |
How has Jefferson County, IL’s Alpha Score moved?
Markets like Jefferson County, IL
- Freeborn County, MN, MNcounty52
- Fayette County, IN, INcounty52
- Jackson County, IL, ILcounty50
- Saline County, IL, ILcounty50
- Iroquois County, IL, ILcounty51
- Washington County, IN, INcounty53
- Terrell County, GA, GAcounty53
- Whiteside County, IL, ILcounty55
- West Carroll Parish, LA, LAcounty57
- Henry County, IL, ILcounty53
Frequently asked questions
Is Jefferson County, IL a buyer's or seller's market?
As of July 2026, Jefferson County, IL is classified as a Balanced Market, based on its Alpha Score of 51 out of 100. The classification reflects current price, inventory, affordability, economic, and rental-yield conditions.
Are home prices rising or falling in Jefferson County, IL?
The median sale price in Jefferson County, IL is $165K, having risen 10% over the past year.
How affordable is Jefferson County, IL?
Jefferson County, IL scores 87 out of 100 on affordability — relatively affordable relative to local incomes and prevailing mortgage rates compared with other counties.
What's driving Jefferson County, IL's Alpha Score?
Jefferson County, IL's strongest dimension is Affordability (87/100) and its weakest is Economic Strength (35/100). The Alpha Score is a weighted blend of all five dimensions.
Want the live, interactive view of Jefferson County, IL? Open the full market dashboard — charts, ZIP-level drill-down, and watchlist tracking. Explore the map or read the methodology.