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 and multiracial populations.

Population by Race

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%

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