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 12,821,813 people according to the US Census Bureau's 2021 American Community Survey.
The Illinois median household income in the past 12 months is $72,563 in 2021 inflation-adjusted dollars according to the US Census Bureau's 2021 American Community Survey.
Illinois has 5,412,995 housing units according to the US Census Bureau's 2021 American Community Survey.

Build Your Business, Not Excel™ Spreadsheets

10,031 businesses & marketers use Cubit to get the data they need.

Skip Hours of Internet Research.

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.

A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z

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 2021 datasets – specifically the 2021 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 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	5,265,398
2	DuPage County	934,094
3	Lake County	714,484
4	Will County	696,403
5	Kane County	518,648
6	McHenry County	310,749
7	Winnebago County	285,471
8	Madison County	266,112
9	St. Clair County	258,597
10	Champaign County	206,583

See all Illinois Counties by Population

Illinois Cities by Population

1	Chicago	2,742,119
2	Aurora	183,447
3	Joliet	150,323
4	Naperville	149,013
5	Rockford	148,942
6	Springfield	114,672
7	Elgin	114,156
8	Peoria	113,672
9	Waukegan	89,751
10	Champaign	88,343