St. Clair County
- Population
- 253,694
- Area
- 0.66 sq mi (1.7 km²), 0.02 sq mi water
- Median age
- 39.9
- Households
- 100,846
- Persons per household
- 2.5
- Median household income
- $73,854
- Median house value
- $180,300
Demographics: 2020–2024 ACS
Tonight
70°F
Showers And Thunderstorms92% precip
Saturday
76°F
Showers And Thunderstorms Likely66% precip
Saturday Night
66°F
Showers And Thunderstorms Likely63% precip
Sunday
79°F
Chance Rain Showers27% precip
Cities & Towns in St. Clair County
BellevilleBrooklynCahokia HeightsCaseyvilleCollinsvilleColumbiaDarmstadtDupoEast CarondeletEast St. LouisFairmont CityFairview HeightsFayettevilleFloravilleFreeburgLebanonLenzburgMadisonMarissaMascoutahMillstadtNew AthensNew BadenO'FallonPaderbornRentchlerSaugetScott AFBShilohSmithtonSt. LiborySummerfieldSwanseaWashington Park