Mind-boggled by Illinois Demographics?

Get the Illinois demographic data that you need. You can get the most current Illinois data from the US Census Bureau without spending 40 high-value hours searching the internet.

  • The Illinois population is 12,549,689 people according to the US Census Bureau's 2023 Population Estimates Program.
  • The Illinois median household income in the past 12 months is $78,433 in 2022 inflation-adjusted dollars according to the US Census Bureau's 2022 American Community Survey.
  • Illinois has 5,427,357 housing units according to the US Census Bureau's 2022 American Community Survey.

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  • The most current data
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  • 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 40+ hours of internet research, data pulling & formatting.

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

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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.

Currently, most data points are from 2022 and 2023 datasets – specifically the 2023 Population Estimates Program and 2022 American Community Survey. 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 5,087,072
2 DuPage County 921,213
3 Lake County 708,760
4 Will County 700,728
5 Kane County 514,982
6 McHenry County 312,800
7 Winnebago County 280,922
8 Madison County 262,752
9 St. Clair County 251,018
10 Champaign County 205,644

See all Illinois Counties by Population

Illinois Cities by Population

1 Chicago 2,664,452
2 Aurora 177,563
3 Joliet 150,489
4 Naperville 150,245
5 Rockford 146,120
6 Elgin 113,310
7 Springfield 112,544
8 Peoria 110,460
9 Champaign 89,189
10 Waukegan 87,642

See all Illinois Cities by Population

Illinois Zip Codes by Population

1 60629 108,997
2 60618 92,235
3 60632 86,372
4 60647 85,685
5 60639 85,248
6 60804 84,189
7 60617 83,188
8 60608 82,749
9 60625 80,296
10 60623 76,611

See all Illinois Zip Codes by Population

Products & Services

Demographics Reports

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About Us

Illinois-Demographics.com is made by the Cubit Team.

Kristen Carney

Kristen,
Cofounder

Working with data since 2002

Anthony Morales

Anthony,
Cofounder

Working with data since 2000

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