Property Tax 101

The median property tax (also known as real estate tax) in Williamson County is $1,213.00 per year, based on a median home value of $87,600.00 and a median effective property tax rate of 1.38% of property value.

Williamson County collects relatively high property taxes, and is ranked in the top half of all counties in the United States by property tax collections. Of the one-hundred--two counties in Illinois, Williamson County is ranked 74th by median property taxes, and 80th by median tax as percentage of home value.

Williamson County has lower property taxes than many other Illinois counties. The median home value is $87,600.00, compared to the median property value in Illinois of $202,200.00

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74th out of 102 By median yearly property tax

80th out of 102 By percentage of median home value

74th out of 102 By percentage of median income

You can see how Williamson County (highlighted in green) compares to the one-hundred--two other counties in Illinois with the bar chart above, sorted by median property tax in dollars. For a visual map of county property tax rates in Illinois, see our Illinois county property tax map.

Remember: Real estate prices also play a large part in which Illinois counties have the highest and lowest median property taxes. Higher-valued properties will generally have higher taxes, even if the median percentage of home value levied as property tax is different. For comparisons, you can also use Percentage Of Home Value.

Property tax assessments in Williamson County are the responsibility of the Williamson County Tax Assessor, whose office is located in Marion, Illinois.

If you need to pay your property tax bill, ask about a property tax assessment, look up the Williamson County property tax due date, or find property tax records, visit the Williamson County Tax Assessor's page. Applications for the Williamson County homestead exemption, any property tax appeals, and applications for a current use tax reduction must also be submitted to the Williamson County Assessor's Office.

For some properties, you can easily find the most recent tax assessment by looking up the property address with our property records search. You can also use our Williamson County Property Tax Calculator to estimate your property tax based on median tax values (results open in new page).