Johnson County, IL Housing Market Brief
county · IL · as of August 2026
What is Johnson 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 Johnson County, IL in its market cycle?
Johnson County, IL is classified as Declining — cooling, with scores declining over recent months. This is a classification of recent (1–12 month) momentum, not a price forecast.
Johnson County, IL housing market data
| Metric | Value | YoY |
|---|---|---|
| Median Sale Price | $217K | ▼ -17.2% |
| Median Days on Market | 46 days | ▼ -58.9% |
| Months of Supply | 3.4 | ▼ -45.2% |
| Homes for Sale | 52 | ▲ +8.3% |
| Homes Sold | 16 | ▲ +100% |
| Median Price / Sq Ft | $121 | ▼ -11.4% |
How has Johnson County, IL’s Alpha Score moved?
Markets like Johnson County, IL
Frequently asked questions
Is Johnson County, IL a buyer's or seller's market?
As of August 2026, Johnson County, IL is classified as a Balanced Market, based on its Alpha Score of 55 out of 100. The classification reflects current price, inventory, affordability, economic, and rental-yield conditions.
Are home prices rising or falling in Johnson County, IL?
The median sale price in Johnson County, IL is $217K, having fallen 17.2% over the past year.
How affordable is Johnson County, IL?
Johnson County, IL scores 72 out of 100 on affordability — relatively affordable relative to local incomes and prevailing mortgage rates compared with other counties.
What's driving Johnson County, IL's Alpha Score?
Johnson County, IL's strongest dimension is Affordability (72/100) and its weakest is Price Momentum (40/100). The Alpha Score is a weighted blend of all five dimensions.
Want the live, interactive view of Johnson County, IL? Open the full market dashboard — charts, ZIP-level drill-down, and watchlist tracking. Explore the map or read the methodology.