Oak Brook demographics profile

StatisticOak BrookIllinoisNational
Population density (sq mi)1,00322291
Median age55.137.437.7
Male/Female ratio0.9:11.0:11.0:1
Married (15yrs & older)74%55%55%
Families w/ Kids under 1821%44%43%
Speak English72%77%79%
Speak Spanish2%13%13%
Oak Brook, IL has a population of 7,988 and is the 4,685th largest city in the United States. The population density is 1,003 per sq mi which is 351% higher than the Illinois average and 1007% higher than the national average. The median age in Oak Brook is 55 which is approximately 47% higher than the Illinois average of 37. In Oak Brook, 74% of the population over 15 years of age are married, 72% speak English and 2% speak Spanish. 60% of Oak Brook residents were born in Illinois, 12% were born out of state, 1% were born outside of the United States and 26% were foreign born.
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Did you know?

  • The population density in Oak Brook is 351% higher than Illinois.
  • The median age in Oak Brook is 47% higher than Illinois.
  • In Oak Brook 69.29% of the population is White.
  • In Oak Brook 2.35% of the population is Black or African American.
  • In Oak Brook 22.31% of the population is Asian.

Compare Oak Brook, IL Demographics To Other Cities

Oak Brook population breakdown by race

RaceOak BrookIllinoisNational
Black or African American2.35%14.30%12.63%
American Indian0.13%0.23%0.82%
Native Hawaiian0.00%0.03%0.18%
Mixed race3.91%2.34%3.06%
Other race2.02%5.86%4.75%
In Oak Brook, 4.1% of people are of Hispanic or Latino origin.
Please note: Hispanics may be of any race, so also are included in any/all of the applicable race categories above.

Languages spoken

Place of birth by citizenship

Household income distribution

Source of income

Oak Brook age breakdown

Marital status

Age of children in married couples

Source: The Oak Brook, IL demographics data displayed above is derived from the 2016 United States Census Bureau American Community Survey (ACS).
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