Mercer County Property Tax Rate — Illinois 2026
In Mercer County, Illinois, homeowners pay a median annual property tax of $2,710 on a median home value of $139,300, resulting in an effective property tax rate of 1.95%. This rate is 0.13% lower than the Illinois state average (2.07%) and 1.04% higher than the national average (0.91%).
How Mercer County Compares
Property taxes in Mercer County are above the national average but closer to the Illinois state average, indicating a moderate tax burden for the region.
Property Tax Calculator for Mercer County
Enter your home’s estimated market value to calculate your approximate annual property tax in Mercer County, Illinois.
This estimate uses the effective tax rate of 1.95% based on ACS data. Actual taxes may differ based on local assessments, exemptions, and levies.
Housing Breakdown
Property Tax Details for Mercer County, Illinois
The median property tax paid by homeowners in Mercer County is $2,710 per year. Based on a median home value of $139,300, this translates to an effective property tax rate of 1.95%.
For context, the statewide median property tax in Illinois is $5,189 with an effective rate of 2.07%, while the national average effective rate stands at 0.91%. Mercer County’s effective rate is 0.13% lower than the Illinois state average (2.07%).
Of the 6,413 housing units in Mercer County, approximately 82.72% are owner-occupied and 17.28% are renter-occupied. Homeownership rates can influence local tax policy, as communities with higher ownership rates often see more voter engagement on property tax issues.
Important: The data on this page is for informational purposes only and should not be used as tax advice. Actual property taxes depend on your property’s assessed value, local millage rates, and any applicable exemptions. Contact your county assessor’s office for precise tax information.