Taxes in Carbondale

Carbondale layers a real, severely elevated effective property tax rate on top of Illinois's simple flat 4.95% state income tax, with no Carbondale-specific local income tax.

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A real, severely elevated effective property tax rate

Carbondale's own median effective property tax rate ran 3.23% per Ownwell -- meaningfully above both Jackson County's own broader 1.84% average and Illinois's already-high 1.88% Tax Foundation-cited statewide average, with real ZIP-level variation from 2.66% to 3.43%.

Illinois's flat state income tax, with no local layer

Illinois's real, simple flat 4.95% state income tax applies in Carbondale with no Carbondale-specific municipal or school-district income tax layered on top.

A real, substantial retirement-income exemption

Illinois taxes none of a retiree's Social Security, pension, or 401(k)/IRA income -- a real, substantial statewide positive that applies equally to Carbondale retirees, per illinois.js.

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.