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Advertise here →Johnston City, IL · Market Data
Johnston City, Illinois real estate market data.
Real estate market data for Johnston City, IL (Williamson County) — Census median home value $84,500, county listing prices down about 8.0% over the past year.
Johnston City, IL is in Williamson County, Illinois — covering the whole local market here: resale homes, condos, land, and new construction. The most recent Census estimate puts the population at 3,351, with a median household income of $46,629. Census data puts Johnston City's median home value at $84,500 (all owner-occupied homes); Williamson County's current median listing price runs $200,000, down about 8.0% over the past year.
At a glance
Johnston City market snapshot
Population
3,351
Median Household Income
$46,629
Median Home Value (city)
$84,500
Median Listing Price (Williamson County)
$200,000
Median Gross Rent
$830/mo
Price Trend (YoY)
-8.0%
Market data compiled from public sources; deemed reliable but not guaranteed; verify independently. Full source list ↗
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Advertise here →Why Johnston City
What makes Johnston City different
Home Value, By Source
The Census Bureau's American Community Survey (2023 5-year estimate) puts Johnston City's median home value — across all owner-occupied homes, not just recent sales — at $84,500. Separately, Williamson County's current median listing price (via Realtor.com data, 2026-06-01) runs $200,000. These cover different geography (city vs. county) and different measures (assessed value vs. active listings), which is why we show both rather than picking one — full source list on our data sources page.
County Price Trend
Williamson County's FHFA house price index shows a 5.04% annual change in 2025.
Population & Income
Johnston City has an estimated population of 3,351 and a median household income of $46,629, per the Census Bureau's American Community Survey (2023 5-year estimate).
Affordability Snapshot
Johnston City's Census-reported median home value works out to about 1.8x the area's median household income, and median gross rent runs roughly 21% of that same income on an annualized basis. Housing economists commonly flag a price-to-income ratio above 4x as historically elevated -- useful context, not a personal affordability verdict.
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Common questions
Johnston City FAQ
What are home values like in Johnston City, IL?
The Census Bureau's American Community Survey puts Johnston City's median home value at $84,500. Williamson County's current median listing price runs $200,000, down about 8.0% over the past year.
What is the population of Johnston City, IL?
The U.S. Census Bureau's American Community Survey (2023 5-year estimate) puts Johnston City's population at approximately 3,351.
What's the median rent in Johnston City, IL?
The Census ACS estimates median gross rent in Johnston City at approximately $830 per month.
What is the median household income in Johnston City, IL?
Census ACS data puts the median household income in Johnston City at approximately $46,629.
Is the Johnston City housing market growing?
Williamson County's FHFA house price index shows a 5.04% annual change in 2025.
Is Johnston City, IL affordable relative to income?
Census ACS data puts Johnston City's median home value at about 1.8 times the median household income, with median gross rent equal to roughly 21% of that income annually. This is a general benchmark, not a personal pre-qualification -- your own income, debt, and down payment determine what you can actually afford.
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