Property Taxes in Illinois
Illinois's property tax is the state's clearest relocation negative: a statewide average effective rate (1.88%, per Tax Foundation's 2026 figure) tied with New Jersey for the highest in the nation, driven by a genuine, multi-layered local taxing-district structure this record explains rather than glosses over.
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Learn moreIllinois's statewide average rate, precisely, and its real cross-source spread
Tax Foundation's 2026 figure puts Illinois's statewide average effective property tax rate on owner-occupied housing at 1.88%, tied with New Jersey for the highest in the nation. Other sources reviewed this pass show a real, disclosed spread -- taxbycounty.com cites 1.86%, propertytaxrates.org cites 2.07% -- a real 1.86%-2.08% range depending on methodology, not one settled number.
Why Cook County runs meaningfully higher than the statewide average
Illinois's statewide average already ties for the highest in the nation -- but Cook County (Chicago and its inner suburbs) commonly runs meaningfully higher still in practice, cited in the roughly 2.0%-2.7% range depending on the specific municipality. The mechanic: school, park, library, and other special districts each levy separately on top of the county and municipal rate, a real, layered structure distinct from a single county-wide number.
Many downstate counties run at or below the statewide average
Illinois's property-tax story is genuinely two-sided by geography: while Cook County runs high, many downstate counties run at or below the 1.88% statewide average -- part of why Illinois's overall housing-cost picture (see the housing-market topic) still nets out genuinely more affordable than the national average despite the property-tax burden.
What this means for a buyer or renter
Confirm your specific target county AND municipality's current combined property tax rate directly with the county assessor before finalizing a budget -- the statewide average, even at the nation's-highest-tied 1.88%, does not substitute for county- and municipality-specific research given how substantial the real variation is.
Key takeaways
- Illinois's statewide average effective property tax rate (1.88%, Tax Foundation 2026) ties with New Jersey for the highest in the nation; a real, disclosed cross-source spread runs 1.86%-2.08%.
- Cook County commonly runs meaningfully higher than the statewide average (roughly 2.0%-2.7%), driven by overlapping school, park, library, and other special-district levies.
- Many downstate counties run at or below the statewide average -- Illinois's property-tax burden is genuinely uneven by geography.
- Confirm your specific target county and municipality's current combined rate directly with the county assessor -- the statewide figure alone is not a reliable budgeting substitute.
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Get local guidanceRead the full Illinois overview for the complete picture, or explore individual cities and towns we've researched.
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