Cost of Living in St. Clair County, IL

Modeled annual cost: $46,820.

Median family income: $92,727.

Affordability Snapshot

IL County Median

$46,460

State Rank

39thMost expensive counties in IL out of 102See Illinois county rankings

Median Income

$92,727

Location Type

Metro

Biggest category:

Transport is the biggest expense in St. Clair County, IL.

$12,081 per year.

Cost breakdown

Total

$46,820

Per year

  • Transport:$12,081
  • Housing:$10,930
  • Taxes:$9,516
  • Healthcare:$5,471
  • Other Costs:$4,680
  • Food:$4,142
  • Childcare:$0

* Percentages may not add up to 100% due to rounding.

Cheaper counties in Illinois

1Calhoun County, IL
$41,222
2Morgan County, IL
$42,968
3Rock Island County, IL
$43,203
4Randolph County, IL
$43,239
5Warren County, IL
$43,283

Popular comparisons in Illinois

See how St. Clair County, IL compares across the country.

Explore our cost of living interactive map to compare St. Clair County, IL with multiple counties in the United States.

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Cost of Living in St. Clair County, IL (2026)