The Town Files

St. Clair County, Illinois

253,694 people. The median home is worth $180,300 (typical Illinois town: $156,600) and the median household earns $73,854.

Towns in St. Clair County

Towns in St. Clair County

TownPeopleMedian homeIncomeMedian age
Belleville42,404$141,300$63,53539.1
O'Fallon32,289$295,700$105,98237.8
East St. Louis18,469$52,600$35,70044.3
Fairview Heights16,706$177,700$80,93041.0
Swansea14,386$223,600$91,58742.3
Shiloh14,098$274,000$99,57341.0
Mascoutah8,754$224,900$97,37537.5
Lebanon4,691$170,700$88,75030.2
Freeburg4,582$241,200$92,06545.6
Caseyville4,400$96,800$60,66942.1
Millstadt4,071$230,500$90,90147.1
Smithton4,006$256,300$135,45545.6
Dupo3,996$113,800$61,64442.9
Scott AFB3,688—$103,39026.6
Washington Park2,592$37,500$38,75034.2

People and housing

St. Clair CountyTypical Illinois town
Median home value$180,300$156,600
Median rent$1,090$960
Median household income$73,854$72,500
Median age39.940.4
Bachelor's degree or higher31.8%21.8%
Below the poverty line13.6%9.9%

Jobs and pay

89,981 jobs in 2024, average pay $57,001 a year.

Largest industries in St. Clair CountyHealth care & social assistan…13,326 jobs · $57,729Retail11,535 jobs · $35,887Hotels & restaurants9,978 jobs · $24,054Professional & technical serv…5,654 jobs · $94,177Manufacturing4,961 jobs · $69,206Construction4,769 jobs · $74,915
BLS QCEW 2024.
Unemployment rate in St. Clair County0%2%4%6%8%10%12%2000200420082012201620202023 4.6%
BLS LAUS via USDA ERS, annual averages.

Storms since 1996

NOAA recorded 829 storm events in St. Clair County from 1996 to 2026, with 21 deaths.

Storm events in St. Clair County by type since 1996Hail239Heat36Flood14Tornado32High Wind8Lightning7Heavy Snow12Flash Flood44Strong Wind5Winter Storm33
NOAA NCEI Storm Events Database.

Federal disaster declarations

St. Clair County has been included in 19 FEMA declarations since 1953.

DeclaredIncidentDeclaration
September 20, 2024FloodDR-4819: Severe Storms, Tornadoes, Straight-Line Winds, And Floodng
October 14, 2022FloodDR-4676: Severe Storm And Flooding
March 26, 2020BiologicalDR-4489: Covid-19 Pandemic
March 13, 2020BiologicalEM-3435: Covid-19
September 19, 2019FloodDR-4461: Severe Storms And Flooding
June 24, 2008Severe StormDR-1771: Severe Storms And Flooding
Sources: U.S. Census Bureau ACS 2020–2024; BLS QCEW and LAUS; NOAA Storm Events; FEMA OpenFEMA (not endorsed by FEMA).