Home values, rents and more in Grundy County, IL
September 2026 figures from Zillow and the U.S. Census Bureau · updated 2026-11-07
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How Grundy County, IL compares
The typical home in Grundy County, IL is worth about $323,000, according to the Zillow Home Value Index for September 2026. Home values in Grundy County, IL are 9% below the typical value in the Chicago metro area ($356,000) and 12% below the U.S. typical value ($366,000).
Over the past year, home values in Grundy County, IL rose 3.6%, compared with +5.0% in the Chicago metro area and +1.2% nationally.
Typical rent is $1,392 a month (Zillow Observed Rent Index), 36% below the Chicago metro area ($2,163) and 28% below the U.S. ($1,932). Rents rose 4.7% over the past year.
The median household income is $92,235, against $90,887 in the Chicago metro area and $80,734 in the U.S. (Census Bureau, American Community Survey 2020–24).
About 54,052 people live in Grundy County, IL (Census Bureau estimate for July 2025).
Grundy County, IL has the 5th-lowest typical home value of the 13 counties in the Chicago metro area and the 8th-highest of 102 in Illinois with Zillow figures.
Part of: Chicago metro area · Illinois
More for Grundy 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
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Nearby counties
Cities in Grundy County, IL
ZIP codes in Grundy 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.