Cook County vs DuPage County

A side-by-side comparison of Cook County and DuPage County: population, income, housing, and more.

Cook County and DuPage County are counties in Illinois. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Cook County has the higher population (5,185,812 vs 927,263 in DuPage County). DuPage County has the higher median household income ($110,502 vs $81,797 in Cook County). DuPage County has the higher median home value ($374,100 vs $305,200 in Cook County).

Population, income & housing

	Cook County	DuPage County
Population	5,185,812	927,263
Median age	37.8 yrs	40.0 yrs
Median household income	$81,797	$110,502
Median home value	$305,200	$374,100
Median gross rent	$1,381	$1,628
Housing units	2,270,349	366,099
Homeownership rate	57.5%	73.1%
Bachelor's degree or higher	41.9%	51.4%
Unemployment rate	6.9%	4.8%

Trends (ACS 5-year, 2019–2023)

	Cook County	DuPage County
Population	5,198,275 → 5,185,812 (-0.2%)	929,060 → 927,263 (-0.2%)
Median household income	$64,660 → $81,797 (+26.5%)	$92,809 → $110,502 (+19.1%)
Median home value	$246,600 → $305,200 (+23.8%)	$308,500 → $374,100 (+21.3%)
Median gross rent	$1,123 → $1,381 (+23.0%)	$1,316 → $1,628 (+23.7%)

Cook County

Population

5,198,2755,185,812

Median household income

$64,660$81,797

Median home value

$246,600$305,200

Median gross rent

$1,123$1,381

DuPage County

Population

929,060927,263

Median household income

$92,809$110,502

Median home value

$308,500$374,100

Median gross rent

$1,316$1,628

Age & race/ethnicity

Age distribution (share)

	Cook County	DuPage County
Under 5	5.6%	5.6%
5 to 17	15.8%	16.8%
18 to 24	8.6%	8.3%
25 to 34	15.8%	12.3%
35 to 44	13.9%	13.6%
45 to 54	12.4%	12.9%
55 to 64	12.3%	13.7%
65 to 74	9.2%	10.1%
75 and over	6.3%	6.7%

Race & ethnicity (share)

	Cook County	DuPage County
White (non-Hispanic)	40.5%	63.1%
Black or African American	22.1%	4.9%
American Indian & Alaska Native	0.1%	0.0%
Asian	7.7%	12.6%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.4%	0.4%
Two or more races	2.7%	3.2%
Hispanic or Latino	26.5%	15.7%

Educational attainment (age 25+)

Share of adults 25+

	Cook County	DuPage County
No high school diploma	11.7%	6.8%
High school graduate	22.2%	18.1%
Some college or associate's	24.2%	23.6%
Bachelor's degree	24.4%	30.5%
Graduate or professional degree	17.6%	21.0%

Commute to work

How workers get to work (share)

	Cook County	DuPage County
Drove alone	56.2%	66.5%
Carpooled	7.8%	6.8%
Public transit	13.0%	4.5%
Walked	3.9%	1.4%
Bicycle	0.9%	0.2%
Worked from home	16.5%	19.4%
Other means	1.7%	1.2%

Housing

Units in structure (share)

	Cook County	DuPage County
1-unit, detached	39.8%	58.4%
1-unit, attached	5.5%	12.0%
2 to 4 units	19.7%	4.6%
5 to 19 units	14.6%	12.5%
20 or more units	19.6%	12.1%
Mobile home & other	0.8%	0.3%

Poverty & households

	Cook County	DuPage County
Poverty rate	13.3%	6.4%
Average household size	2.45	2.62
Mean commute (minutes)	32	28
Median year structure built	1961	1978