Henderson County, Illinois Property Taxes

What Are Effective Property Tax Rates Across Henderson County?

Local government entities set tax rates, which vary widely across Henderson 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 Henderson County's effective property tax rate to other counties in Illinois or the U.S. median of 1.02%.

Henderson County's median effective rate stands at 1.88%, which is higher than the national median of 1.02%. Within Henderson County, the highest rate is found in OQUAWKA at 1.79%, while OQUAWKA has the lowest at 1.79%.

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 Henderson County are calculated from a home’s assessed value, not its market price alone. Local taxing authorities apply tax rates to that assessed value, and the final bill reflects the combination of county, school, and other local levies. For homeowners, this means two similar homes can receive different bills if their assessed values or exemptions differ.

The county’s median home price is $51,688, which helps explain why bills can vary widely across properties. The 25th percentile tax bill is $668, while the 75th percentile is $2,803 and the 90th percentile is $4,654. That spread shows how assessment differences and local tax rates can significantly affect what homeowners owe.

In Henderson County, the median tax bill in Oquawka is $1,111, and that figure is the same for both the highest and lowest median tax bill listed. For homeowners, understanding how the assessment is set is important, because even small changes can have a meaningful impact on annual property taxes.