Mind-boggled by Illinois Demographics?

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Get the Illinois demographic data that you need. You can get the most current Illinois data from the US Census Bureau without spending 8 to 10 high-value hours searching the internet.

  • The Illinois population is 12,770,631 people according to the US Census Bureau's 2019 American Community Survey.
  • The Illinois median household income in the past 12 months is $65,886 in 2019 inflation-adjusted dollars according to the US Census Bureau's 2019 American Community Survey.
  • Illinois has 5,360,315 housing units according to the US Census Bureau's 2019 American Community Survey.

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Get demographic data for any location in Illinois for just $49.

  • The most current data
  • Trustworthy — from US government data sources
  • Easy to Understand — jargon-free data
  • Most Popular data — like population, income & age
  • Confidence — includes proper citations & footnotes
  • Time Savings — Our customers tell us these reports save 10+ hours of internet research, data pulling & formatting.

To learn more, click on the letter that the name of your city or county begins with.

How Current are the Data?

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

Currently, most data points are from 2019 datasets – specifically the 2019 American Community Survey (ACS) 5-year dataset. We use the Census’ ACS 5-year dataset for 3 reasons.

  1. It’s updated every year.
  2. It typically has the smallest margins of error of the Census’ ACS datasets.
  3. It allows for apples to apples comparisons of large geographies to small geographies (i.e. state data to city data).

We’re constantly updating the demographic reports and this site with the most current data throughout the year.

Got questions about these Illinois demographics? Call us at 1-800-939-2130.

Illinois Counties by Population

1 Cook County 5,198,275
2 DuPage County 929,060
3 Lake County 701,473
4 Will County 689,315
5 Kane County 531,376
6 McHenry County 307,714
7 Winnebago County 284,819
8 Madison County 264,776
9 St. Clair County 262,338
10 Champaign County 209,922

Illinois Cities by Population

1 Chicago 2,709,534
2 Aurora 199,927
3 Joliet 147,826
4 Naperville 147,501
5 Rockford 147,070
6 Springfield 115,888
7 Peoria 113,532
8 Elgin 112,653
9 Champaign 87,636
10 Waukegan 87,297

Illinois Zip Codes by Population

1 60629 110,029
2 60618 94,907
3 60632 89,857
4 60639 88,204
5 60647 87,633
6 60617 83,553
7 60804 82,383
8 60623 81,283
9 60608 80,059
10 60625 79,444

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About Us

Illinois-Demographics.com is made by Cubit – a demographic data provider. Call us at 1-800-939-2130 or email us.

Cubit Founders Kristen and Anthony

Cubit's co-founders have been working with data for a combined 25 years.

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