St. Clair County, IL — Population & Demographics
St. Clair County, IL has a population of 254,777. The median household income is $70,178 and the median age is 39.5.
254,777
Population
$70,178
Median Income
$168,800
Median Home Value
39.5
Median Age
Race & Ethnicity
| White | 61.2% |
| Black or African American | 28.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.3% |
| Two or More Races | 0.0% |
Economy & Income
$70,178
Median Household Income
$37,824
Per Capita Income
9.5%
Poverty Rate
3.5%
Unemployment
Housing
$168,800
Median Home Value
$1,032
Median Rent
67.8%
Homeownership
Education
92.7%
High School+
30.7%
Bachelor's+
Frequently Asked Questions
St. Clair County, IL has a population of 254,777 according to Census ACS 2023 data.
The median household income in St. Clair County, IL is $70,178.
Data from the American Community Survey (ACS) 5-Year estimates.