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St. Clair County, IL Property Tax Calculator

St. Clair County homeowners pay a median $3,665 a year in property tax, 2.03% of a median $180,300 home: above Illinois's 2.01% and the national 0.94%.

At an effective rate of 2.03%, a $180,300 home pays about $3,665 a year in property tax, $305 a month.

Property tax a year
$3,665
A month (for escrow)
$305
Effective rate on the home
2.03%

Property tax in St. Clair County by home value, at 2.03%

Home valueA yearA month
$200,000$4,066$339
$300,000$6,099$508
$400,000$8,132$678
$500,000$10,165$847
$750,000$15,248$1,271
$1,000,000$20,330$1,694

St. Clair County against Illinois and the US

Effective rateMedian taxMedian home valueMedian household income
St. Clair County2.03%$3,665$180,300$73,854
Illinois2.01%$5,298$263,300$83,390
United States0.94%$3,119$332,700$80,734

How this calculator works

Median real estate taxes paid ÷ median home value in St. Clair County, from the Census Bureau's American Community Survey 2020–2024 5-year estimates. The calculator starts at the county's median home value and rate.

What it assumes

  • Cities, school districts and special districts within the county levy different rates, so bills vary within it.
  • Survey figures cover 2020 to 2024 and lag recent reassessments.

Questions people ask

What is the property tax rate in St. Clair County?

The effective rate is 2.03%: a median $3,665 a year on a median $180,300 home. That's the 20th highest of the 28 Illinois counties we cover.

How much is property tax on a $400,000 house in St. Clair County?

About $8,132 a year, $678 a month, at the county's effective rate, before any exemption.

How does St. Clair County compare with the rest of Illinois?

Its rate is above the state's 2.01%. Across Illinois, covered counties range from 1.58% to 2.58%.

How do I lower my St. Clair County property tax?

Apply for every exemption you qualify for, such as a homestead exemption, and appeal your assessment if it is higher than comparable homes sold nearby; the county assessor explains the deadlines.

Other Illinois counties

Related calculators

  • Illinois Property Tax CalculatorIllinois homeowners pay a median $5,298 a year in property tax, 2.01% of a median $263,300 home: the 2nd highest effective rate of the 50 states and DC.
  • Illinois Mortgage CalculatorYour monthly mortgage payment in Illinois, with Illinois's effective property tax rate (2.01%) built in, at this week's average rate. The calculator starts at the state's median home value, $263,300.
  • Home Affordability CalculatorThe home price your income supports under the 28/36 guideline lenders use, counting your other debts, down payment, taxes and insurance, at this week's average rate.

Sources

Updated by the RateHerald team. The maths is tested against worked examples; report a problem.