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Dupage Policy Journal

Monday, July 14, 2025

Oak Brook responsible for 27th-highest sales tax revenue per muncipality in Illinois during May

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Director David Harris | Illinois Department of Revenue

Director David Harris | Illinois Department of Revenue

Oak Brook taxpayers paid the 27th largest sum in sales taxes per municipality in May, according to Illinois tax records.

In total, residents paid approximately $2.6 million in sales taxes during that month.

Oak Brook ranked 22nd in the Prairie State the month before, with just over $2.8 million spent in sales taxes.

The largest share of sales taxes paid by Oak Brook residents in May came from the Municipal Sales Tax.

In Illinois, municipal sales taxes, usually set at 1%, are added to the state sales tax of 5% and a county tax of 0.25%, resulting in a combined state tax rate of 6.25%. These taxes can vary locally and are used to address municipal needs such as infrastructure, public services, and community development. The revenue generated is destined to fund local government operations, public safety, education, and other community projects.

A 2025 WalletHub study found that Illinois has the highest overall taxes in the U.S., with rates more than 50% higher than the national average. The study estimates that a median household in Illinois pays an effective tax rate of 16.58%, or about $13,099 per year.

Composition of Sales Tax Revenue in Oak Brook in May

Municipal Sales Tax [69.7%]Non-Home Rule Sales Tax [30.3%]

Sales Taxes Collected in Oak Brook in May
Type of TaxTotal Amount Collected% Change From Previous Month
Municipal Sales Tax$1,817,039-8%
Non-Home Rule Sales Tax$788,938-5.9%

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