St. Clair County Property Taxes
St. Clair County, Illinois
Effective Tax Rate
0.00%
27% above state avgMedian Annual Tax
$0
$294/mo escrow
Estimate Your Tax
Annual Tax
$0
Monthly
$0
Eff. Rate
2.09%
At a Glance
Median Home Value
$168,800
State avg ▲ $146,132
Tax w/ Mortgage/yr
$4,082
$340/mo escrow
Tax w/o Mortgage/yr
$2,745
$229/mo
State Tax Rate Rank
#78
of 102 counties (1 = lowest)
Similar tax rates
Data Story
About Property Taxes in St. Clair County, Illinois
St. Clair taxes exceed national average
At 2.09%, St. Clair County's effective tax rate surpasses the national median of 2.05%, placing it in roughly the 55th percentile nationally. The median property tax of $3,533 is 31% above the national median of $2,690, making St. Clair one of the nation's higher-taxing counties relative to home values.
St. Clair ranks among state's highest taxes
At 2.09%, St. Clair's effective rate exceeds Illinois' state average of 1.83% by 26 basis points, placing it in the upper tier statewide. The $3,533 median tax is among the highest county-level burdens in Illinois.
St. Clair significantly higher than region
At 2.09%, St. Clair's rate substantially exceeds neighboring Rock Island (2.33% is higher, but St. Clair outpaces most others like Sangamon at 1.98%). The $3,533 median tax represents the heaviest burden among its peer counties in the region.
Budget approximately $3,533 annually
On the median home valued at $168,800, St. Clair County homeowners typically pay $3,533 per year in property taxes. When mortgage escrow reserves are included, the median rises to $4,082.
High-tax homeowners should appeal
In a high-tax county like St. Clair, overassessments hit harder on household budgets—many residents never discover their assessments exceed fair market value. Filing an appeal is straightforward and could reduce your tax burden by hundreds annually.
How St. Clair County Compares
Median Annual Property Tax
St. Clair County
2.09%
Effective rate
Illinois Avg
1.90%
Effective rate
National Avg
0.91%
Effective rate
Frequently Asked Questions
What is the property tax rate in St. Clair County, Illinois?
How much are property taxes in St. Clair County?
How does St. Clair County compare to the Illinois average?
What is the median home value in St. Clair County, Illinois?
Why is St. Clair County property tax rate higher than the Illinois average?
How does St. Clair County rank for property taxes in Illinois?
Counties with Similar Tax Rates
Nearby Counties
Other Counties in Illinois
Data updated: March 2026
Data from U.S. Census Bureau, American Community Survey 2019-2023 5-Year Estimates. Effective tax rate is calculated as median property tax divided by median home value.