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 12,671,821 people according to the US Census Bureau's 2019 Population Estimates Program.
The Illinois median household income in the past 12 months is $63,575 in 2018 inflation-adjusted dollars according to the US Census Bureau's 2018 American Community Survey.
Illinois has 5,347,268 housing units according to the US Census Bureau's 2018 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 2018 datasets – specifically the 2018 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	5,150,233
2	DuPage County	922,921
3	Lake County	696,535
4	Will County	690,743
5	Kane County	532,403
6	McHenry County	307,774
7	Winnebago County	282,572
8	Madison County	262,966
9	St. Clair County	259,686
10	Champaign County	209,689

See all Illinois Counties by Population

Illinois Cities by Population

1	Chicago	2,693,976
2	Aurora	197,757
3	Naperville	148,449
4	Joliet	147,344
5	Rockford	145,609
6	Springfield	114,230
7	Elgin	110,849
8	Peoria	110,417
9	Champaign	88,909
10	Waukegan	86,075