Williamson County, Illinois Property Taxes
Census Bureau ACS property tax data for Illinois. Population: 20,467.
The median annual property tax in Williamson County is $2,490, which is 10% lower than the Illinois state average and 29% above the national average. The effective tax rate is 1.71% on a median home value of $145,600. Property taxes represent 3.8% of the median household income in this county.
Median Annual Tax
$2,490
-10% vs State
+29% vs US
Median Home Value
$145,600
+0% vs State
-31% vs US
Effective Tax Rate
1.71%
-7% vs State
+80% vs US
With vs Without Mortgage
With Mortgage
$2,924
$244/mo
Without Mortgage
$1,729
$144/mo
Homeowners with a mortgage typically own higher-valued properties, which can result in higher tax bills.
Property Tax History
| Year | Median Tax | Effective Rate |
|---|---|---|
| 2023 | $2,490 +6.5% | 1.71% |
| 2022 | $2,337 +8.9% | 1.68% |
| 2021 | $2,146 +8.7% | 1.71% |
| 2020 | $1,975 +8.1% | 1.63% |
| 2019 | $1,827 | 1.59% |
Tax Burden
Tax-to-Income Ratio
3.8%
of median household income
Median Income
$65,521
per year
Monthly Tax
$208
per month
Other Counties in Illinois
Union County
Tax: $1,851/yr Rate: 1.41%
Boone County
Tax: $4,507/yr Rate: 2.27%
Christian County
Tax: $1,896/yr Rate: 1.69%
Wayne County
Tax: $1,670/yr Rate: 1.53%
Perry County
Tax: $1,744/yr Rate: 1.66%
Alexander County
Tax: $966/yr Rate: 1.65%
Frequently Asked Questions
What is the average property tax in Williamson County, Illinois? ▼
The median annual property tax in Williamson County is $2,490 based on the most recent Census Bureau American Community Survey data. The effective tax rate is 1.71% on a median home value of $145,600.
How does Williamson County property tax compare to the national average? ▼
Property taxes in Williamson County are 29% above the national average of $1,923. The effective rate of 1.71% compares to 0.95% nationally.
Does having a mortgage affect property taxes in Williamson County? ▼
In Williamson County, homeowners with a mortgage pay a median of $2,924 in annual property taxes, while homeowners without a mortgage pay $1,729. This difference often reflects the value of homes rather than different tax rates.
What percentage of income goes to property taxes in Williamson County? ▼
Property taxes in Williamson County represent approximately 3.8% of the median household income of $65,521. The national benchmark is generally 2-4% of household income.
Explore More Data
Data source: U.S. Census Bureau, American Community Survey 5-Year Estimates. Property tax data reflects median amounts paid by homeowners. Effective rates are calculated as median tax divided by median home value.