Jefferson County, IL Housing Market Brief
county · IL · as of August 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 | $174K | ▲ +11.5% |
| Median Days on Market | 78 days | ▲ +6.9% |
| Months of Supply | 3.6 | ▲ +28.6% |
| Homes for Sale | 95 | ▲ +13.1% |
| Homes Sold | 27 | ▼ -12.9% |
| Median Price / Sq Ft | $112 | ▲ +25.6% |
How has Jefferson County, IL’s Alpha Score moved?
Markets like Jefferson County, IL
- Faribault County, MN, MNcounty58
- Whiteside County, IL, ILcounty61
- Fayette County, IN, INcounty58
- Christian County, IL, ILcounty60
- Jefferson County, AR, ARcounty56
- Clay County, AR, ARcounty60
- Sumner County, KS, KScounty60
- Washington Parish, LA, LAcounty56
- Osceola County, MI, MIcounty58
- Bureau County, IL, ILcounty59
Frequently asked questions
Is Jefferson County, IL a buyer's or seller's market?
As of August 2026, Jefferson County, IL is classified as a Balanced Market, based on its Alpha Score of 58 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 $174K, having risen 11.5% 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 Rental Yield (89/100) and its weakest is Economic Strength (30/100). 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.