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Professional, Scientific, and Technical Services businesses in St. Clair County, IL

Census County Business Patterns 2022. NAICS sector 54.

Establishments
426
1.1% of IL sector
Employees
3,980
0.9% of IL sector
Annual Payroll
$324.1M
total 2022

County context

Population
254,777
Median Household Income
$70,178
Median Home Value
$168,800

Source: ACS 5-Year Estimates 2023.

Compare to Illinois state averages

MetricSt. Clair CountyIL totalCounty share
Establishments42638,0121.1%
Employees3,980450,8290.9%
Annual Payroll$324.1M$52.72B

Related resources

Other sectors in St. Clair County

Professional, Scientific, and Technical Services in other Illinois counties

Data sources: U.S. Census Bureau County Business Patterns 2022 (NAICS 2017); American Community Survey 5-Year Estimates 2023. Public domain (USA.gov).

Generated 2026-05-27. NAICS suppression rules may zero out small counts.