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 12,710,158 people according to the US Census Bureau's 2024 Population Estimates Program.
  • The Illinois median household income in the past 12 months is $81,702 in 2023 inflation-adjusted dollars according to the US Census Bureau's 2023 American Community Survey.
  • Illinois has 5,443,501 housing units according to the US Census Bureau's 2023 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.

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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 2023 datasets – specifically the 2024 Population Estimates Program and 2023 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 5,182,617
2 DuPage County 937,142
3 Lake County 718,604
4 Will County 708,583
5 Kane County 520,997
6 McHenry County 315,959
7 Winnebago County 283,790
8 Madison County 263,017
9 St. Clair County 251,149
10 Champaign County 212,374

See all Illinois Counties by Population

Illinois Cities by Population

1 Chicago 2,721,308
2 Aurora 180,710
3 Naperville 153,124
4 Joliet 151,837
5 Rockford 147,486
6 Elgin 114,701
7 Springfield 112,949
8 Peoria 111,696
9 Champaign 91,961
10 Waukegan 88,570

See all Illinois Cities by Population

Illinois Zip Codes by Population

1 60629 109,292
2 60618 91,896
3 60632 87,831
4 60647 85,589
5 60639 84,505
6 60804 83,223
7 60608 81,459
8 60617 79,284
9 60625 78,467
10 60623 77,061

See all Illinois Zip Codes by Population

Illinois Counties by Average Income

1 Lake County $152,447
2 DuPage County $149,370
3 Will County $131,203
4 Kane County $128,682
5 McHenry County $128,231
6 Kendall County $127,433
7 Monroe County $122,572
8 Cook County $117,699
9 Grundy County $111,929
10 Woodford County $108,426

See all Illinois Counties by Income

Illinois Cities by Average Income

1 Kenilworth $460,411
2 Solon Mills $459,252
3 Winnetka $457,404
4 Glencoe $413,718
5 Hollowayville $386,380
6 Hinsdale $376,366
7 Bannockburn $372,745
8 Riverwoods $345,682
9 Golf $318,594
10 Long Grove $308,436

See all Illinois Cities by Income

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 1998

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