St. Clair County, Illinois
IL · FIPS 17163 · ACS 2024 5-Year Estimates
| Metric | Value | vs National | Rank | Percentile |
|---|---|---|---|---|
| Total Population | 253,694 | — | #284 / 3,222 | |
| Median Household Income | $73,854 | -1.7% | #926 / 3,222 | |
| Median Age | 39.9 years | +2.6% | #2,142 / 3,222 | |
| Median Home Value | $180,300 | -36.0% | #1,638 / 3,222 | |
| Median Gross Rent | $1,090 | -6.3% | #745 / 3,222 | |
| Poverty Rate | 13.6% | +7.8% | #1,657 / 3,222 | |
Demographics
St. Clair County has a population of 253,694, making it the #284 most populous county in the US. The median age is 39.9 years, which is 2.6% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Household Type
Economy
The median household income in St. Clair County is $73,854, ranking #926 out of 3,222 counties — 1.7% below the national median. The poverty rate is 13.6% and unemployment stands at 5.8%.
Median Household Income Trend
Rankings →Poverty Rate Trend
Rankings →Housing
The median home value in St. Clair County is $180,300 (-36.0% vs national). Renters pay a median of $1,090/mo and the homeownership rate is 68.4%.
Median Home Value Trend
Rankings →Health
94.9% of residents in St. Clair County have health insurance coverage, which is 3.5% above the national rate.
About St. Clair County, Illinois
St. Clair County, Illinois has a total population of 253,694, making it the 284th most populous county in the United States. The median age in St. Clair County is 39.9 years, which is 2.6% above the national median of 38.9 years.
The median household income in St. Clair County is $73,854, which ranks #926 of 3,222 counties nationwide. This is 1.7% below the national median of $75,149. The poverty rate is 13.6%, higher than the national rate of 12.6%. The unemployment rate stands at 5.8%.
The median home value in St. Clair County is $180,300, 36.0% below the national median. Renters in St. Clair County pay a median gross rent of $1,090 per month. The homeownership rate is 68.4%, compared to the national rate of 64.4%.
In St. Clair County, 31.8% of residents aged 25 and older hold a bachelor's degree or higher, 5.6% below the national average of 33.7%. Health insurance coverage stands at 94.9% of the population. The average commute time for workers is 26.2 min.
St. Clair County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 59.1% of the population, followed by Black (non-Hispanic) (27.7%) and Two or More Races (5.8%).
All data for St. Clair County, Illinois comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.