St. Clair County, IL
Population: 254,777 · Median Income: $70,178 · 658 sq mi
Population
254,777
Median Income
$70,178
Median Home Value
$168,800
Unemployment
5.7%
Median Age
39.5 yrs
Poverty Rate
13.6%
Median Rent
$1,032/mo
Land Area
658 sq mi
Cities
34
2024 Lean
D+7.9%
St. Clair County is a county in Illinois with a population of 254,777. The median household income is $70,178. The median home value is $168,800. The unemployment rate is 5.7%. The median age is 39.5 years. There are 34 cities in St. Clair County.
Explore St. Clair County Data
2024 Election Results
Source: County Election DataWinner
Democrat
Dem Votes
63,433
53.0%
GOP Votes
54,021
45.1%
Total Votes
119,655
Cities in St. Clair County
Source: Census BureauBellevilleBrooklynCaseyvilleCollinsvilleColumbiaDarmstadtDupoEast CarondeletEast St. LouisFairmont CityFairview HeightsFayettevilleFloravilleFreeburgHeckerLebanonLenzburgMadisonMarissaMascoutahMillstadtNew AthensNew BadenO'FallonPaderbornRentchlerSaugetScott AFBShilohSmithtonSt. LiborySummerfieldSwanseaWashington Park