United States › Illinois › Oak Brook CITY
Oak Brook Illinois · 8,108 residents (2025 est.) · 7.98 sq mi
Time machine
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The short version
Oak Brook is a city of 8,056 people in Illinois. At a median age of 55.2, this is an older place than the country as a whole. That is roughly 111% ahead of the Illinois median. 66% of adults hold a bachelor's degree, against 36% nationally. Home values have risen by half since 2000, reaching $903,200. Owners hold 91% of the housing stock.
At a glance
Wealthier
above the US median
US median: $82,259
Older
median age 55.2
US median: 38.9
More educated
66% hold a bachelor's degree
US average: 36%
More affordable
home values down 16%, inflation adjusted
US median home: $376,019
Section 01
Population & growth from 8,702 in 2000
8,108 in 2025 (Census Bureau estimate)
1,010 / sq mi
−8%since 2009
from 1,094 / sq mi in 2009
US average: 281
from 50.0 in 2000
US average: 38.9
Population, 1990 – 2024
8K 8K 9K 9K 9K 1990 2000 2010 2020 2024 Oak Brook Age distribution, 2024
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $175,870
−34%inflation adjusted, since 2000
from $146,537 in 2000
US average: $82,259
from $76,668 in 2000
US average: $44,673
Households earning $100K+
from 72.9% in 2009
US average: 53.3%
from 2.1% in 2000
US average: 12.5%
from 0.518 in 2010
US average: 0.476
Workforce by industry, 2024
Public administration 9.2%
Professional, scientific, technical 2.9%
Transportation & warehousing 2.5%
Agriculture, forestry, fishing 2%
Education & health services 1.3%
Arts, entertainment, food 0.8%
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$903,200
−16%inflation adjusted, since 2000
from $588,200 in 2000
US average: $376,019
$2,590
+43%inflation adjusted, since 2000
from $996 in 2000
US average: $1,442
from 97.0% in 2000
8.9% rent
from 6.5% in 2009
US average: 10.0%
2.60 people
Unchangedsince 2009
from 2.61 people in 2009
US average: 2.54
from 34.9% in 2009
US average: 22.9%
from 20.8% in 2009
US average: 47.4%
from 6.2 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity 2000
White, non-Hispanic 74.5%(6,480)
Hispanic / Latino 2.4%(208)
2024
White, non-Hispanic 59.3%(4,775)
Hispanic / Latino 5.7%(463)
from 57 in 2009
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 23 more ancestry groups with data from 60.7% in 2000
US average: 35.6%
High school or higher
from 96.0% in 2000
US average: 89.6%
from 34.9% in 2000
US average: 14.0%
Section 06
Commute & transportation from 21.0 min in 2000
US average: 26.5
from 73.9% in 2009
US average: 68.9%
from 9.0% in 2009
US average: 8.5%
from 4.4% in 2009
US average: 3.2%
from 9.4% in 2009
US average: 15.0%
from 2.6% in 2009
US average: 2.4%
from 0.0% in 2009
US average: 0.4%
from 1.4% in 2009
US average: 8.3%
Section 07
Work & employment from 4.7% in 2011
US average: 5.2%
from 51.3% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 57.1% in 2020
US average: 74.6%
from 8.9% in 2009
US average: 13.1%
from 59.5% in 2009
US average: 42.5%
Section 08
People & community from 25.9% in 2009
US average: 14.1%
from 12.6% in 2009
US average: 6.2%
from 10.0% in 2012
US average: 13.3%
from 1.9% in 2013
US average: 8.4%
from 84.5% in 2017
US average: 91.0%
Computer in household
from 89.3% in 2020
US average: 95.5%
from 94.4% in 2020
US average: 87.7%
from 71.5% in 2016
US average: 77.7%
from 2.4% in 2016
US average: 13.6%
Marital status
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 1.9% in 2013
US average: 8.4%
from 61.1% in 2020
US average: 54.8%
Direct-purchase
from 25.6% in 2020
US average: 13.8%
from 34.4% in 2020
US average: 18.4%
from 4.0% in 2020
US average: 20.9%
VA health care
from 1.3% in 2020
US average: 2.2%
Any private
from 81.1% in 2020
US average: 67.1%
Any public
from 37.6% in 2020
US average: 36.7%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans Veterans by period of service, 2024
Gulf War (2001 or later) 3.9%(10)
Share of the 257 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
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Drill deeper
Places similar to Oak Brook Head to head
Compare Oak Brook to nearby cities OAK BROOK VS
Clarendon Hills
Income $130,388 −26%
Home value $605,800 −33%
Population 8,681 +7%
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OAK BROOK VS
Hinsdale
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Home value $1,053,700 +17%
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OAK BROOK VS
Westmont
Income $88,090 −50%
Home value $379,100 −58%
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OAK BROOK VS
Westchester
Income $98,954 −44%
Home value $327,300 −64%
Population 16,300 +101%
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Frequently asked
How many people live in Oak Brook, Illinois? Oak Brook, Illinois has about 8,056 residents according to the 2024 American Community Survey.
What is the median household income in Oak Brook, Illinois? The typical household in Oak Brook, Illinois earns about $175,870 a year. Half of households make more than that, and half make less.
Is Oak Brook, Illinois expensive? In Oak Brook, Illinois, the median home is worth about $903,200, and the typical rent is about $2,590 a month.
How educated are people in Oak Brook, Illinois? About 66.4% of adults age 25 and over in Oak Brook, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Oak Brook, Illinois? About 6.6% of people in Oak Brook, Illinois live below the federal poverty line.
Has Oak Brook, Illinois grown since 1990? Yes, Oak Brook, Illinois has shrunk since 1990. The population has lost about 1,122 residents, a change of about -12 percent over that period.
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