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Williamson County, IL Property Tax Calculator

Williamson County homeowners pay a median $2,690 a year in property tax, 1.72% of a median $156,400 home: below Illinois's 2.01% but above the national 0.94%.

At an effective rate of 1.72%, a $156,400 home pays about $2,690 a year in property tax, $224 a month.

Property tax a year
$2,690
A month (for escrow)
$224
Effective rate on the home
1.72%

Property tax in Williamson County by home value, at 1.72%

Home valueA yearA month
$200,000$3,440$287
$300,000$5,160$430
$400,000$6,880$573
$500,000$8,600$717
$750,000$12,900$1,075
$1,000,000$17,200$1,433

Williamson County against Illinois and the US

Effective rateMedian taxMedian home valueMedian household income
Williamson County1.72%$2,690$156,400$65,604
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 Williamson 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 Williamson County?

The effective rate is 1.72%: a median $2,690 a year on a median $156,400 home. That's the 27th highest of the 28 Illinois counties we cover.

How much is property tax on a $400,000 house in Williamson County?

About $6,880 a year, $573 a month, at the county's effective rate, before any exemption.

How does Williamson County compare with the rest of Illinois?

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

How do I lower my Williamson 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.