Illinois

Illinois Demographic Data

Illinois State Demographic Data

The data used for these Illinois demographic data reports below come from the U.S. Census.

  • % of U.S.
  • State
  • 2010 Population
  • 2000 Population
  • Change
  • 4.16%
  • Illinois
  • 12,830,632
  • 12,419,658
  • 3.3%


Demographic Data for Illinois Counties


  • % of IL
  • County
  • 2010 Population
  • 2000 Population
  • Change
  • 40.49%
  • Cook, IL
  • 5,194,675
  • 5,376,837
  • -3.4%
  • 0.28%
  • Lee, IL
  • 36,031
  • 36,062
  • -0.1%

* Data is not warranted to be accurate or current.

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