Warren County, Illinois Property Taxes

What Are Effective Property Tax Rates Across Warren County?

Local government entities set tax rates, which vary widely across Warren County. Each year, the county estimates its budget for public services and divides that total by the assessed value of all taxable property within its jurisdiction.

Below, compare Warren County's effective property tax rate to other counties in Illinois or the U.S. median of 1.02%.

Warren County's median effective rate stands at 3.58%, which is higher than the national median of 1.02%.

These variations reflect differences in local school district levies, Special service areas (SSAs) assessments, and special district bonds — which compound the base county rate.

Property tax bills in Warren County are based on the assessed value of a home and the local tax rate set by taxing authorities. When a property’s market value rises, the assessed value can increase too, which often leads to a higher tax bill. Homeowners in this county should also expect their bill to reflect local levies for schools, county services, and other public needs.

The typical property tax bill in Warren County is $875 at the 25th percentile, $2,415 at the 75th percentile, and $3,396 at the 90th percentile. That range shows how much bills can vary depending on a home’s value and the specific taxing districts that apply. With a median home price of $32,160, property taxes can still take a meaningful share of housing costs for many homeowners.

Compared with the national median property tax bill of $2,400, Warren County’s 75th percentile is slightly higher, while the 25th percentile is much lower.