Free Illinois (IL) property tax calculator with 2026-specific rates. Calculate your exact property tax using real Illinois data.
The average effective property tax rate in Illinois is 2.07%. On a home valued at $250,000 (the state median), this equates to approximately $5,175 per year in property taxes.
Property taxes in Illinois are calculated by multiplying the assessed value of your property by the local tax rate. The effective rate averages 2.07% statewide, though rates vary by county and municipality.
Illinois's average effective property tax rate of 2.07% is above the national average, making it one of the higher property tax states. The national average effective property tax rate is approximately 1.1%.