St. Clair County, Illinois
Population estimates, July 1, 2025, (V2025) 250,708
People
Population
Population estimates, July 1, 2025, (V2025) 250,708
Population estimates, July 1, 2024, (V2024) 251,149
Population estimates base, April 1, 2020, (V2025) 257,617
Population estimates base, April 1, 2020, (V2024) 257,631
Population, percent change - April 1, 2020 (estimates base) to July 1, 2025, (V2025) -2.7%
Population, percent change - April 1, 2020 (estimates base) to July 1, 2024, (V2024) -2.5%
Population, Census, April 1, 2020 257,400
Population, Census, April 1, 2010 270,056
Age and Sex
Persons under 5 years, percent 5.2%
Persons under 18 years, percent 22.3%
Persons 65 years and over, percent 18.5%
Female persons, percent 51.5%
Race and Hispanic Origin
White alone, percent 64.1%
Black alone, percent(a) 30.5%
American Indian and Alaska Native alone, percent(a) 0.4%
Asian alone, percent(a) 1.9%
Native Hawaiian and Other Pacific Islander alone, percent(a) 0.1%
Two or More Races, percent 3.0%
Hispanic or Latino, percent(b) 5.3%
White alone, not Hispanic or Latino, percent 59.7%
Population Characteristics
Veterans, 2020-2024 21,939
Foreign-born persons, percent, 2020-2024 3.3%
Housing
Housing Units, July 1, 2025, (V2025) 117,335
Owner-occupied housing unit rate, 2020-2024 68.4%
Median value of owner-occupied housing units, 2020-2024 $180,300
Median selected monthly owner costs - with a mortgage, 2020-2024 $1,645
Median selected monthly owner costs - without a mortage, 2020-2024 $645
Median gross rent, 2020-2024 $1,090
Building Permits, 2025 463
Families & Living Arrangements
Households, 2020-2024 100,846
Persons per household, 2020-2024 2.47
Living in the same house 1 year ago, percent of persons age 1 year+ , 2020-2024 88.3%
Language other than English spoken at home, percent of persons age 5 years+, 2020-2024 5.0%
Computer and Internet Use
Households with a computer, percent, 2020-2024 94.2%
Households with a broadband Internet subscription, percent, 2020-2024 89.7%
Education
High school graduate or higher, percent of persons age 25 years+, 2020-2024 93.5%
Bachelor's degree or higher, percent of persons age 25 years+, 2020-2024 31.8%
Health
With a disability, under age 65 years, percent, 2020-2024 11.4%
Persons without health insurance, under age 65 years, percent 5.8%
Economy
In civilian labor force, total, percent of population age 16 years+, 2020-2024 61.4%
In civilian labor force, female, percent of population age 16 years+, 2020-2024 59.8%
Total accommodation and food services sales, 2022 ($1,000)(c) 704,879
Total health care and social assistance receipts/revenue, 2022 ($1,000)(c) 1,956,960
Total transportation and warehousing receipts/revenue, 2022 ($1,000)(c) 920,214
Total retail sales, 2022 ($1,000)(c) 4,592,739
Total retail sales per capita, 2022(c) $18,206
Transportation
Mean travel time to work (minutes), workers age 16 years+, 2020-2024 24.0
Income & Poverty
Median households income (in 2024 dollars), 2020-2024 $73,854
Per capita income in past 12 months (in 2024 dollars), 2020-2024 $38,942
Persons in poverty, percent 12.7%
Businesses
Businesses
Total employer establishments, 2023 4,973
Total employment, 2023 72,871
Total annual payroll, 2023 ($1,000) 3,648,081
Total employment, percent change, 2022-2023 1.8%
Total nonemployer establishments, 2023 17,284
All employer firms, Reference year 2023 3,163
Male-owned employer firms, Reference year 2023 1,548
Female-owned employer firms, Reference year 2023 S
Minority-owned employer firms, Reference year 2023 S
Nonminority-owned employer firms, Reference year 2023 1,993
Veteran-owned employer firms, Reference year 2023 S
Nonveteran-owned employer firms, Reference year 2023 2,325
Geography
Geography
Population per square mile, 2020 391.4
Population per square mile, 2010 410.6
Land area in square miles, 2020 657.71
Land area in square miles, 2010 657.76
FIPS Code 17163