Oak Brook

County:: DuPage County
County Seat:: No
Area (mi²):: 7.976
State:: Illinois

Oak Brook is a village located in DuPage County, Illinois. Oak Brook has a 2025 population of 7,979. Oak Brook is currently declining at a rate of -0.44% annually and its population has decreased by -2.13% since the most recent census, which recorded a population of 8,153 in 2020.

The average household income in Oak Brook is $264,446 with a poverty rate of 7.27%. The median age in Oak Brook is 51.7 years: 54.5 years for males, and 48.2 years for females.

Demographics

The racial composition of Oak Brook includes 61.52% White, 29.81% Asian, and smaller percentages for Black or African American, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Asian

Two or more races

Black or African American

Other race

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	4,939	61.52%
Asian	2,393	29.81%
Two or more races	565	7.04%
Black or African American	86	1.07%
Other race	45	0.56%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

Oak Brook Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Oak Brook's average per capita income is $119,659. Household income levels show a median of $171,123. The poverty rate stands at 7.27%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$233,523	-
Families	$194,432	$292,507
Households	$171,123	$264,446
Non Families	$89,129	$164,768

$119,659

Average Income

$171,123

Median Household Income

7.27%

Poverty Rate