This year's theme is "Harvest the Fun."
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Some of this year's headliners include the Doobie Brothers, Tim McGraw, Alanis Morissette and Nelly.
SEE ALSO: IDOC inmates help beautify Illinois State Fair
The Illinois State Fair runs from Aug. 10 to 20, and is located at the Illinois State Fairgrounds in Springfield.
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Visit statefair.illinois.gov for more information on the performers' schedule and tickets.
Every year, inmates from the Illinois Department of Corrections help with landscaping for the state fair.
"They take a tremendous amount of pride in the work they do," said Jerry Morgan, Illinois State Fairgrounds landscaping supervisor.