Home values, rents and more in Jefferson County, IL
September 2026 figures from Zillow and the U.S. Census Bureau · updated 2026-11-07
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How Jefferson County, IL compares
The typical home in Jefferson County, IL is worth about $147,000, according to the Zillow Home Value Index for September 2026. Home values in Jefferson County, IL are about the same as the typical value in the Mount Vernon metro area ($147,000) and 60% below the U.S. typical value ($366,000).
Over the past year, home values in Jefferson County, IL rose 8.4%, compared with +8.4% in the Mount Vernon metro area and +1.2% nationally.
Typical rent is $992 a month (Zillow Observed Rent Index), about the same as the Mount Vernon metro area ($992) and 49% below the U.S. ($1,932).
The median household income is $63,118, against $63,118 in the Mount Vernon metro area and $80,734 in the U.S. (Census Bureau, American Community Survey 2020–24).
About 36,147 people live in Jefferson County, IL (Census Bureau estimate for July 2025).
Jefferson County, IL has the 43rd-lowest typical home value of the 102 counties in Illinois with Zillow figures.
Part of: Mount Vernon metro area · Illinois
More for Jefferson County, IL in ProMap Plus
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- 5- and 10-year price changes
- Days on market and months of supply
- Price cuts and sale-to-list ratio
- Price-to-income and monthly cost to buy
- School test scores
- Flood, wildfire and natural hazard risk
- Property-tax rate
- Unemployment and job growth
- Building permits
- Mortgage delinquency
- 2024 presidential vote
- Age, education and household make-up
- Amenities and transit nearby
Nearby counties
Cities in Jefferson County, IL
ZIP codes in Jefferson County, IL
Sources
Home values: Zillow Home Value Index (ZHVI), all homes, middle tier, smoothed and seasonally adjusted, September 2026. Rents: Zillow Observed Rent Index (ZORI), seasonally adjusted. Population: Census population estimates (July 2025) for states, metros and counties; ACS 2020–24 for cities and ZIP codes. Income: U.S. Census Bureau, ACS 2020–24 5-year estimates. Boundaries: U.S. Census Bureau cartographic boundary files. Compiled by Home Economics.
"Typical" is Zillow's middle-tier value (homes between the 35th and 65th percentiles), not a median sale price. Changes are over the 12 months to September 2026.