Illinois Outline Illinois Demographics by Cubit

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How Current are the Data?

The Illinois demographics on this site are the most current data available from the US Census Bureau.

The US Census Bureau provides more current data for big geographies like the state of Illinois than they do for small geographies like Sciota – which is why we can't say all of our data are from a particular year.

Most data points are from either 2013 or 2014 datasets. The Census Bureau will release additional 2014 data sets from September to December 2015. And we'll update our data just as soon as the new Census data are released.

Got questions about how current the data are for a particular county or city in Illinois? Call us at 1-800-939-2130.

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Illinois Counties by Population

1 Cook County 5,246,456
2 DuPage County 932,708
3 Lake County 705,186
4 Will County 685,419
5 Kane County 527,306
6 McHenry County 307,283
7 Winnebago County 288,542
8 Madison County 266,560
9 St. Clair County 265,729
10 Champaign County 207,133

Illinois Cities by Population

1 Chicago 2,722,389
2 Aurora 200,456
3 Rockford 149,123
4 Joliet 147,928
5 Naperville 146,128
6 Springfield 116,809
7 Peoria 115,828
8 Elgin 111,117
9 Waukegan 88,915
10 Champaign 84,513

Products & Services

Spreadsheet Reports

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Starter Reports

A colorful PDF with the most important demographics for cities & counties. A handy tool for new entrepreneurs.



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