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States / Illinois / St. Clair County

St. Clair County

Population 256,791 · ACS 2020-2024

Median Household Income
$73,854
Median Home Value
$180,300
Median Gross Rent
$1,090/mo
Poverty Rate
13.6%
Unemployment Rate
5.8%
Homeownership Rate
68.4%
Bachelor's Degree or Higher
31.8%
Median Age
39.9

Population Over Time

St. Clair County shrank 5.5% from 2014 to 2024.

2014
268,415
2016
265,569
2018
263,463
2020
261,186
2022
256,791
2024
253,694

Business & Industry

St. Clair County has 4,973 business establishments employing 72,871 people.

Health care and social assistance
651
Other services (except public administration)
568
Accommodation and food services
553
Construction
433
Professional, scientific, and technical services
429
Finance and insurance
343
Administrative and support and waste management and remediation services
286
Real estate and rental and leasing
205

Establishments by industry sector. Source: U.S. Census Bureau, County Business Patterns.

Source: U.S. Census Bureau, American Community Survey, ACS 2020-2024.

St. Clair County: Population, Income & Housing | CityMetricsUSA