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
This Afternoon
85°F
Sunny
Tonight
69°F
Mostly Clear5% precip
Saturday
86°F
Sunny2% precip
Saturday Night
64°F
Mostly Clear
Cities & Towns in St. Clair County
BellevilleBrooklynCahokia HeightsCaseyvilleCollinsvilleColumbiaDarmstadtDupoEast CarondeletEast St. LouisFairmont CityFairview HeightsFayettevilleFloravilleFreeburgLebanonLenzburgMadisonMarissaMascoutahMillstadtNew AthensNew BadenO'FallonPaderbornRentchlerSaugetScott AFBShilohSmithtonSt. LiborySummerfieldSwanseaWashington Park