Home values, rents and more in Knox County, IL
September 2026 figures from Zillow and the U.S. Census Bureau · updated 2026-11-07
Open Knox County, IL in ProMap- Under $120k
- $120k–$140k
- $140k–$170k
- $170k–$190k
- $190k+
- No data
How Knox County, IL compares
The typical home in Knox County, IL is worth about $120,000, according to the Zillow Home Value Index for September 2026. Home values in Knox County, IL are about the same as the typical value in the Galesburg metro area ($120,000) and 67% below the U.S. typical value ($366,000).
Over the past year, home values in Knox County, IL rose 11.8%, compared with +11.8% in the Galesburg metro area and +1.2% nationally.
The median household income is $57,030, against $57,030 in the Galesburg metro area and $80,734 in the U.S. (Census Bureau, American Community Survey 2020–24).
About 47,767 people live in Knox County, IL (Census Bureau estimate for July 2025).
Knox County, IL has the 22nd-lowest typical home value of the 102 counties in Illinois with Zillow figures.
Part of: Galesburg metro area · Illinois
More for Knox County, IL in ProMap Plus
These measures are on the map for subscribers. Open ProMap to see them for Knox County, IL and every other place.
- 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 Knox County, IL
ZIP codes in Knox 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.