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 12,671,469 people according to the US Census Bureau's 2021 Population Estimates Program.
The Illinois median household income in the past 12 months is $68,428 in 2020 inflation-adjusted dollars according to the US Census Bureau's 2020 American Community Survey.
Illinois has 5,373,385 housing units according to the US Census Bureau's 2020 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 2020 datasets – specifically the 2020 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	5,173,146
2	DuPage County	924,885
3	Lake County	711,239
4	Will County	697,252
5	Kane County	515,588
6	McHenry County	311,122
7	Winnebago County	283,119
8	Madison County	264,490
9	St. Clair County	254,796
10	Champaign County	205,943

See all Illinois Counties by Population

Illinois Cities by Population

1	Chicago	2,696,555
2	Aurora	179,266
3	Joliet	150,372
4	Naperville	149,104
5	Rockford	147,711
6	Elgin	113,911
7	Springfield	113,394
8	Peoria	111,666
9	Champaign	89,114
10	Waukegan	88,614