CITY · 1990 CENSUS

Oak Brook

Illinois · 9,178 residents · 7.98 sq mi

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The short version

Oak Brook is home to 9,178 people in Illinois. Households here earn about 242% more than in Illinois as a whole. The median household earns $110,331, about 266% above the national median. Median home value sits at $480,300. 52% of adults hold a bachelor's degree, against 20% nationally. 96% of homes are owner-occupied.

At a glance

Wealthier

above the US median

US median: $30,130

Older

median age 42.2

US median: 33.0

More educated

52% hold a bachelor's degree

US average: 20%

Stable housing

home values roughly flat, inflation adjusted

US median home: $93,722

Section 01

Population & growth

Total population

9,178

+5%vs 2000

vs 8,702 in 2000

1990 – 2025

Median age

42.2

−16%vs 2000

vs 50.0 in 2000

US average: 33.0

Land area

7.98 sq mi

Population, 1990 – 2024

20248K

Age distribution, 1990

Under 54.5%(417)

US avg: 7.3%

5 to 96.4%(583)

US avg: 7.3%

10 to 148.6%(791)

US avg: 6.9%

15 to 197.8%(718)

US avg: 7.1%

20 to 245.9%(546)

US avg: 7.5%

25 to 346.8%(627)

US avg: 17.5%

35 to 4415.3%(1,406)

US avg: 15.1%

45 to 5418.7%(1,713)

US avg: 10.2%

55 to 6412.9%(1,183)

US avg: 8.5%

65 to 748.6%(786)

US avg: 7.3%

75 to 843.9%(354)

US avg: 4%

85 and over0.6%(54)

US avg: 1.2%

BAR + DOT: THIS PLACE · TICK: US AVERAGE

Section 02

Income & economy

Median household income

$110,331

−1%inflation adjusted, since 2000

vs $146,537 in 2000

US average: $30,130

1990 – 2024

Per capita income

$60,347

−21%vs 2000

vs $76,668 in 2000

US average: $14,340

Poverty rate

2.7%

+0.6 ptsvs 2000

vs 2.1% in 2000

US average: 13.2%

Section 03

Housing

Median home value

$480,300

+8%inflation adjusted, since 2000

vs $588,200 in 2000

US average: $93,722

1990 – 2024

Median gross rent

$646

−15%inflation adjusted, since 2000

vs $996 in 2000

US average: $450

Owner-occupied

95.8%

−1.1 ptsvs 2000

vs 97.0% in 2000

4.2% rent

Section 04

Race & ethnicity

2000

White, non-Hispanic74.5%(6,480)

Black1.4%(119)

Hispanic / Latino2.4%(208)

Asian20.1%(1,750)

Other0%

1990

White, non-Hispanic81.2%(7,457)

Black1.3%(121)

Hispanic / Latino1.7%(157)

Asian17.2%(1,576)

Other0.3%(24)

No data for the years selected.

Section 04 · Origins

Detailed origins & ancestry

Detailed origin tables are available for 2024; showing 2024 data.

Hispanic origin

Puerto Rican1.5%(120)

South American1.3%(101)

Argentine1.1%(89)

Cuban0.9%(74)

Mexican0.9%(69)

Spaniard0.8%(63)

Bolivian0.1%(12)

Asian origin

Asian Indian17.4%(1,401)

Chinese6%(487)

Pakistani3.5%(279)

Uzbek1.4%(113)

Sri Lankan1%(77)

Korean0.7%(54)

Filipino0.6%(48)

Taiwanese0.3%(26)

Malaysian0.3%(25)

Japanese0.3%(23)

Ancestry

Irish12.3%(992)

Italian10.2%(818)

Arab8.4%(677)

German7.4%(594)

Polish4.9%(392)

American3.7%(302)

Palestinian3.5%(281)

English3.5%(280)

Czech2.6%(207)

Greek2.4%(197)

Scottish2.4%(193)

Egyptian1.4%(111)

+ 23 more ancestry groups with data

French1.3%(103)

Swedish1%(80)

Syrian0.9%(70)

Iranian0.9%(70)

Russian0.6%(45)

Iraqi0.5%(44)

Norwegian0.5%(43)

Slovene0.5%(38)

Ukrainian0.4%(35)

Scotch-Irish0.4%(34)

Lithuanian0.4%(32)

Moroccan0.3%(23)

Danish0.3%(23)

Subsaharan African0.3%(21)

Austrian0.2%(16)

Slovak0.2%(13)

Bulgarian0.1%(11)

Dutch0.1%(11)

Latvian0.1%(11)

Swiss0.1%(11)

Hungarian0.1%(10)

Nigerian0.1%(8)

French Canadian0.1%(6)

RANKED:Largest Asian Indian population · Largest Irish population · Largest Italian population · Largest Arab population · Largest German population

Section 05

Education

Bachelor's degree or higher

52.0%

−8.7 ptsvs 2000

vs 60.7% in 2000

US average: 20.3%

High school or higher

94.6%

−1.4 ptsvs 2000

vs 96.0% in 2000

US average: 75.2%

Graduate degree

26.8%

−8.0 ptsvs 2000

vs 34.9% in 2000

US average: 7.1%

Section 06

Commute & transportation

Average commute

26.1 min

+24%vs 2000

vs 21.0 min in 2000

US average: 21.9

Section 07

Work & employment

No data for the years selected.

Section 08

People & community

No data for the years selected.

Marital status (2024)

Men 15+

Never married23.7%(811)

Married59.8%(2,042)

Widowed10.4%(354)

Divorced6.1%(210)

Women 15+

Never married22.1%(766)

Married60.4%(2,094)

Widowed12.3%(428)

Divorced5.2%(181)

SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024

Section 09

Health coverage

Showing 2024 (the nearest year with coverage data).

Uninsured

0.6%

−1.3 ptssince 2013

from 1.9% in 2013

US average: 8.4%

Employer-based

59.8%

−1.3 ptssince 2020

from 61.1% in 2020

US average: 54.8%

Direct-purchase

25.1%

−0.5 ptssince 2020

from 25.6% in 2020

US average: 13.8%

Medicare

34.5%

+0.1 ptssince 2020

from 34.4% in 2020

US average: 18.4%

Medicaid

10.3%

+6.3 ptssince 2020

from 4.0% in 2020

US average: 20.9%

VA health care

0.9%

−0.4 ptssince 2020

from 1.3% in 2020

US average: 2.2%

Any private

81.5%

+0.4 ptssince 2020

from 81.1% in 2020

US average: 67.1%

Any public

39.8%

+2.2 ptssince 2020

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)

US avg: 26.4%

Gulf War (1990s)5.1%(13)

US avg: 24.3%

Vietnam era44%(113)

US avg: 33.1%

Korean War14%(36)

US avg: 4.5%

World War II0%(0)

US avg: 1%

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.

BAR + DOT: THIS PLACE · TICK: US AVERAGE

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