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 8 to 10 high-value hours searching the internet.

The Illinois population is 12,802,023 people according to the US Census Bureau's 2017 Population Estimates Program.
The Illinois median household income in the past 12 months is $59,196 in 2016 inflation-adjusted dollars according to the US Census Bureau's 2016 American Community Survey.
Illinois has 5,310,327 housing units according to the US Census Bureau's 2016 American Community Survey.

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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 2016 datasets – specifically the 2016 American Community Survey (ACS) 5 year dataset. We use the Census’ ACS 5 year dataset for 3 reasons.

It’s updated every year.
It typically has the smallest margins of error of the Census’ ACS datasets.
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 Radius 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	5,211,263
2	DuPage County	930,128
3	Lake County	703,520
4	Will County	692,661
5	Kane County	534,667
6	McHenry County	309,122
7	Winnebago County	284,778
8	Madison County	265,428
9	St. Clair County	262,479
10	Champaign County	209,399

See all Illinois Counties by Population

Illinois Cities by Population

1	Chicago	2,716,450
2	Aurora	200,965
3	Joliet	148,462
4	Naperville	147,682
5	Rockford	147,051
6	Springfield	114,868
7	Peoria	112,883
8	Elgin	112,456
9	Waukegan	87,729
10	Champaign	87,432