Taxes in Oak Park

Oak Park layers a real, severely elevated property tax rate and a high combined sales tax on top of Illinois's simple flat 4.95% state income tax.

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A Real, Severely Elevated Property Tax Rate

Oak Park's median effective property tax rate ran approximately 3.39% per Ownwell -- among the highest of any Illinois Tier A market this project documents, over three times the national median.

A Real, High Combined Sales Tax

Oak Park's combined sales tax rate ran 10.0% (ZIP 60303) to 10.25% (ZIP 60304), depending on the specific taxing district.

Illinois's Flat Income Tax and Retirement-Income Exemption

Illinois's flat 4.95% state income tax applies to earned income statewide, but Illinois taxes NONE of a retiree's Social Security, pension, or 401(k)/IRA income -- a real, substantial positive that applies identically in Oak Park.

Key takeaways

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Last reviewed: 2026-08-25. Independent research; not financial, tax, or legal advice -- confirm current figures with a local professional before making a decision.