CountyTax

Illinois property tax rates by county

Illinois · #2 of 52 · 102 counties

2.01%state benchmark

Median annual property tax $5,298 · median home value $263,300

Above the U.S. benchmark 0.94%. Payment dates are set locally — see below.

When it's due in Illinois

All states

Payment dates vary by local tax authority.

Check your city, town or county tax collector for this year's deadline. The statewide notes below are a general guide.

Late penalty1.5% interest per month on delinquent amounts (35 ILCS 200/21-15, 21-20)
Appeal windowwithin 30 days of assessment publication with county Board of Review (35 ILCS 200/16-55)

county-set; dual statutory system under 35 ILCS 200/21-15: Cook County 1st installment due March 1 and 2nd installment due August 1 (or 30 days post-mailing); other 101 counties typically due June 1 and September 1. Regular annual schedule; tax year: prior year assessment, bills mailed winter & summer. Source: 35 ILCS 200/21-15, 21-20, rules checked 2026-09-19. Confirm the amount and deadline on your official tax bill.

Counties, highest rate first

Benchmark = median real estate taxes paid ÷ median home value, ACS 2020–2024 5-year. Counties where the Census reports a range ("less than $200", "$10,000 or more") get no rate.