St. Clair County, Illinois

Browse all ZIP codes in St. Clair County, Illinois. Each ZIP code page includes population, median household income, and a map of the area.

County Statistics

Total Population 250,563
Median Household Income $66,289
Median Age 39.4
Unemployment Rate 5.9%
Poverty Rate 13.6%
ZIP Codes 27

Largest ZIP Codes in St. Clair County

ZIP Code City Population Median Income
62269O Fallon35,467$99,258
62221Belleville29,454$75,112
62226Belleville29,333$66,054
62220Belleville19,277$64,277
62208Fairview Heights16,690$75,538

Demographics

Race & Ethnicity

Gender

Education Level (adults 25+)

All ZIP Codes in St. Clair County