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.

  • 2020 The Illinois population is 12,812,508 people according to the US Census Bureau's 2020 Census.
  • 2019 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.
  • 2020 Illinois has 5,426,429 housing units according to the US Census Bureau's 2020 Census.

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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 the 2020 Census or 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 2020

1 Cook County 5,275,541
2 DuPage County 932,877
3 Lake County 714,342
4 Will County 696,355
5 Kane County 516,522
6 McHenry County 310,229
7 Winnebago County 285,350
8 Madison County 265,859
9 St. Clair County 257,400
10 Champaign County 205,865

Illinois Cities by Population 2020

1 Chicago 2,746,388
2 Aurora 180,542
3 Joliet 150,362
4 Naperville 149,540
5 Rockford 148,655
6 Elgin 114,797
7 Springfield 114,394
8 Peoria 113,150
9 Waukegan 89,321
10 Champaign 88,302

Illinois Zip Codes by Population 2019

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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