The aggregate sales tax rate for Cook County is between 8.0% and 9.25% depending on the taxing jurisdiction. Download sales tax rates for Cook County. Note: The provided .csv download contains sales tax rates for the entire state of Illinois, including Cook County.

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Over 40% of all Illinois residents live in Cook County, a densely populated urban county that contains most of the city of Chicago and several suburbs, for a population that exceeds five million people. In 2008, Cook county increased several tax rates, including sales tax and currently has one of the highest aggregated sales tax rates in the U.S.

The gem of Cook County, Chicago, has a history that is steeped in intrigue. From the glory days of Al Capone to Operation Greylord in the 1980′s that saw the downfall of many prominent civic figures, including 17 judges, 48 lawyers, 8 policemen, 10 deputy sheriffs, 8 court officials, and one state legislator. Today, Chicago, or “The Windy City” is the third largest city in the United States and has the fourth-largest gross domestic product (GDP) in the world, out-ranked only by Tokyo, New York City, and Los Angeles, making Chicago one of the most important centers of commerce in the world.