St. Clair County, Illinois
Total Population: 254,777
County Seat: Belleville
Median Home Value
$168,800
Owner-occupied units
Median Household Income
$70,178
Across all households
Median Age
39.5 yrs
Across all residents
Bachelor's Degree+
30.7%
Adults 25 and older
Nearby Counties
Demographics
14 fieldsRacial & Ethnic Composition
Under 18 Years
23.3%
65 Years and Over
16.8%
Male
48.5%
Female
51.5%
U.S. Citizens (18+)
98.4%
No Health Insurance
5.4%
Education
3 fieldsHigh School Graduate or Higher (25+)
92.7%
Bachelor's Degree or Higher (25+)
30.7%
Enrolled in College (18+)
7.3%
Economics
6 fieldsMedian Household Income
$70,178
Mean Household Income
$92,847
Per Capita Income
$37,824
Unemployment Rate (16+)
5.5%
In Labor Force (19–64)
77.8%
SNAP / Food Stamps
16.4%
Housing & Households
13 fieldsMedian Home Value
$168,800
Median Rent
$1,032/mo
Total Housing Units
115,348
Owner-Occupied
67.8%
Renter-Occupied
32.2%
Vacancy Rate
12.2%
Married Couple Households
43.9%
Cohabiting Couple Households
5.8%
Male Householder, No Partner
19.2%
Female Householder, No Partner
31.1%
Average Household Size
2.47
Broadband Internet Access
88.1%
Housing Built Since 2010
7.6%
Source: U.S. Census Bureau, American Community Survey 2023 5-Year Estimates. County FIPS 17163.