Home values, rents and more in St. Clair County, IL
September 2026 figures from Zillow and the U.S. Census Bureau · updated 2026-11-07
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How St. Clair County, IL compares
The typical home in St. Clair County, IL is worth about $178,000, according to the Zillow Home Value Index for September 2026. Home values in St. Clair County, IL are 35% below the typical value in the St. Louis metro area ($273,000) and 51% below the U.S. typical value ($366,000).
Over the past year, home values in St. Clair County, IL rose 1.2%, compared with +3.3% in the St. Louis metro area and +1.2% nationally.
Typical rent is $1,333 a month (Zillow Observed Rent Index), 7% below the St. Louis metro area ($1,427) and 31% below the U.S. ($1,932). Rents rose 4.6% over the past year.
The median household income is $73,854, against $80,196 in the St. Louis metro area and $80,734 in the U.S. (Census Bureau, American Community Survey 2020–24).
About 250,708 people live in St. Clair County, IL (Census Bureau estimate for July 2025).
St. Clair County, IL has the 4th-lowest typical home value of the 15 counties in the St. Louis metro area and the 34th-highest of 102 in Illinois with Zillow figures.
Part of: St. Louis metro area · Illinois
More for St. Clair 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
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- 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 St. Clair County, IL
- Belleville, IL $159,000
- O Fallon, IL $315,000
- East Saint Louis, IL $34,926
- Cahokia Heights, IL $46,270
- Fairview Heights, IL $197,000
- Swansea, IL $265,000
- Shiloh, IL $316,000
- Mascoutah, IL $265,000
- Freeburg, IL $267,000
- Lebanon, IL $175,000
- Caseyville, IL $113,000
- Millstadt, IL $297,000
- Dupo, IL $130,000
- Smithton, IL $309,000
- Fairmont City, IL $65,801
- New Athens, IL $164,000
- Washington Park, IL $33,301
- Marissa, IL $115,000
- Lenzburg, IL $115,000
ZIP codes in St. Clair County, IL
- 62201 · East Saint Louis $56,867
- 62203 · East Saint Louis $38,862
- 62204 · East Saint Louis $33,645
- 62205 · East Saint Louis $32,264
- 62206 · Cahokia Heights $48,869
- 62207 · Cahokia Heights $39,086
- 62208 · Fairview Heights $194,000
- 62220 · Belleville $153,000
- 62221 · Belleville $251,000
- 62223 · Belleville $180,000
- 62226 · Belleville $182,000
- 62232 · Caseyville $141,000
- 62239 · Dupo $131,000
- 62240 · Columbia $84,821
- 62243 · Freeburg $266,000
- 62254 · Lebanon $208,000
- 62255 · Lenzburg $110,000
- 62258 · Mascoutah $259,000
- 62260 · Millstadt $296,000
- 62264 · New Athens $161,000
- 62269 · O Fallon $312,000
- 62285 · Smithton $309,000
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.