St. Clair County, IL Property Taxes (2026)

St. Clair County owners pay a median of $3,533 a year on a median home value of $168,800, an effective rate of 2.09%. That's the 25th-highest rate of 102 Illinois counties with Census data, above the Illinois county median of 1.85%.

Updated October 2026 · Data: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023)

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Effective tax rate

2.09%

25th highest of 102 in IL

Median annual bill

$3,533

~$294/month

Median home value

$168,800

Illinois county median

1.85%

Effective rate

What a protest could save you in St. Clair County

Enter the market value from your appraisal notice. We apply St. Clair County's 2.09% effective rate and a 10–15% reduction, the typical range for successful protests.

$
Est. annual tax
$3,528
Savings at 10–15% off
$353–$529
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St. Clair County vs. Illinois vs. U.S. property tax rates

St. Clair County2.09%
Illinois county median1.85%
U.S. county median0.84%

Key stat: St. Clair County's effective property tax rate is 2.09%, vs. 1.85% for the median Illinois county and 0.84% for the median U.S. county. It ranks 25th of 102 in Illinois. Effective rate = median tax bill ÷ median home value, so it already reflects typical exemptions. (Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023))

How to appeal your property taxes in St. Clair County

  1. 1

    Review your assessment notice

    Check the assessed value from the St. Clair County Assessor. Compare it to recent sales of similar homes nearby.

  2. 2

    File your appeal before the deadline

    The St. Clair County deadline is 30 days after publication. Missing it means waiting until the next assessment year.

  3. 3

    Gather evidence

    Recent comparable sales, photos of condition issues, repair estimates or an independent appraisal.

  4. 4

    Present your case

    Submit evidence or attend a hearing with the County Assessor.

  5. 5

    Get your decision

    If you win, your assessed value and bill go down. On a $3,533 bill, 10–15% off is $353–$530 a year.

Want help with it?

TaxDrop builds your case from comparable sales data.

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Property tax exemptions in Illinois

Illinois homeowners may qualify for exemptions that reduce taxable value. Check with the St. Clair County Assessor for amounts.

Homestead exemption

For your primary residence. Reduces the value used to calculate your bill.

Senior / over-65

Many states add an exemption or freeze for owners 65 and older.

Disability

For homeowners with qualifying disabilities, often similar to the over-65 benefit.

Veterans

Disabled veterans may get partial or full exemptions depending on rating.

Frequently Asked Questions

What is the property tax rate in St. Clair County, Illinois?
The median effective property tax rate in St. Clair County is 2.09%: a median annual bill of $3,533 on a median home value of $168,800. That's the 25th-highest rate of 102 Illinois counties with Census data. Your own rate depends on which city, school district and special districts you're in. Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2019–2023).
How much are property taxes in St. Clair County?
The median St. Clair County property tax bill is $3,533 a year, about $294 a month, compared with a Illinois county median of $2,363.
What is the deadline to appeal property taxes in St. Clair County?
The deadline to appeal in St. Clair County is 30 days after publication. Missing it means waiting until the next assessment cycle.
Is St. Clair County a high property tax area?
St. Clair County's 2.09% effective rate is above the Illinois county median of 1.85% and above the U.S. county median of 0.84%. That's the 25th-highest rate of 102 Illinois counties with Census data.
Can TaxDrop help lower my St. Clair County property taxes?
TaxDrop analyzes your property against local comparable sales and helps you appeal your assessment.

Property taxes in nearby counties

Monroe County

Rate: 1.70%

Median bill: $4,523

Madison County

Rate: 1.92%

Median bill: $3,232

Clinton County

Rate: 1.86%

Median bill: $3,356

Washington County

Rate: 1.85%

Median bill: $2,766

Randolph County

Rate: 1.40%

Median bill: $1,877

Bond County

Rate: 1.96%

Median bill: $2,612

Perry County

Rate: 1.66%

Median bill: $1,744

Jersey County

Rate: 1.75%

Median bill: $2,957

← All 102 Illinois counties

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