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Oak Brook, Illinois
Village of Oak Brook
Mayslake Peabody Estate
Location of Oak Brook in DuPage and Cook Counties, Illinois.
Location of Oak Brook in DuPage and Cook Counties, Illinois.
Country  United States
State Illinois
Counties DuPage, Cook
Townships York, Downers Grove, Proviso
Incorporated 1958
 • Type Council–manager
 • Total 8.30 sq mi (21.49 km2)
 • Land 7.98 sq mi (20.66 km2)
 • Water 0.32 sq mi (0.83 km2)  3.99%
663 ft (202 m)
 • Total 8,163
 • Density 1,023.45/sq mi (395.15/km2)
  Down 9.41% from 2000
Standard of living (2013)
 • Per capita income $77,387
 • Median home value $728,296
ZIP code(s)
Area code(s) 630 and 331
Geocode 54534
FIPS code 17-54534
Mayslake Peabody Estate - Forest Preserve
Mayslake Peabody Estate Forest Preserve

Oak Brook is a village in DuPage County with a small portion in Cook County in Illinois. Per the 2020 census, the population was 8,163. This suburb of Chicago has the headquarters of several companies and organizations including Ace Hardware, Blistex, Federal Signal, CenterPoint Properties, Sanford L.P., TreeHouse Foods, and Lions Clubs International. It is the former corporate home of McDonald's and Ferrara Candy (now both moved to Chicago).


Oak Brook was originally known as Fullersburg, named after Ben Fuller, an early settler.

Oak Brook was incorporated as a village in 1958, due in large part to the efforts of Paul Butler, a prominent civic leader and landowner whose father had first moved to the vicinity in 1898 and opened a dairy farm shortly thereafter. Prior to incorporation, the name Oak Brook was used by local residents to distinguish their community from neighboring Hinsdale and Elmhurst, going back to the founding of the Oak Brook Civic Association almost two decades earlier.

The original boundaries were smaller than the present extent of the village, but a considerable amount of land was annexed soon after the founding of the village, including the land that is now the site of the Oakbrook Center shopping mall, which opened in 1962.

Paul Butler's interest in sport was reflected in the Oak Brook Sports Core, which features polo fields, a golf course (which was at one time the venue for the Western Open), swimming and tennis facilities, and other recreational facilities not commonly found in a village of this size.

The Oak Brook Historical Society was established in 1975 to serve as a community advocate for the historic preservation of the village and to be a resource for research and preservation of its history. Their current goal is to restore the Old Butler School, which will serve the community as the Oak Brook Heritage Center, operated by the Oak Brook Historical Society. The Heritage Center will provide multigenerational programming, exhibits of the heritage and history of Oak Brook, a research library, and small group meeting space.


Oak Brook is located at 41°50′24″N 87°57′11″W / 41.84000°N 87.95306°W / 41.84000; -87.95306 (41.84018, −87.953079).

According to the 2010 census, Oak Brook has a total area of 8.279 square miles (21.44 km2), of which 7.95 square miles (20.59 km2) (or 96.03%) is land and 0.329 square miles (0.85 km2) (or 3.97%) is water.

Oak Brook is located about 19 miles (31 km) west of the Chicago Loop (downtown Chicago) and is served by a network of major federal, state, and county roads, including the Tri-State Tollway (Interstate 294), the Ronald Reagan Memorial Tollway (Interstate 88), and the Eisenhower Expressway (Interstate 290). Although Oak Brook is not directly served by any CTA or Metra trains, the commercial corridor along 22nd Street is served by several Pace bus routes, and train stations in neighboring villages offer commuter train access to downtown Chicago.

Most of Oak Brook consists of residential subdivisions, with the exception of the Oakbrook Center shopping mall and other retail and office properties along 22nd Street and the Interstate 88 corridor in the northern part of the village.

The village's adjacent neighbors are Elmhurst to the north, Hillside to the northeast, Westchester to the east, Hinsdale and Westmont to the south, Downers Grove to the southwest, and Lombard and Oakbrook Terrace to the northwest.


Historical population
Census Pop.
1960 324
1970 4,164 1,185.2%
1980 6,676 60.3%
1990 9,178 37.5%
2000 8,702 −5.2%
2010 7,883 −9.4%
2020 8,163 3.6%
U.S. Decennial Census
2010 2020

2020 census

Oak Brook village, Illinois – Demographic Profile
(NH = Non-Hispanic)
Race / Ethnicity Pop 2010 Pop 2020 % 2010 % 2020
White alone (NH) 5,395 4,648 68.44% 56.94%
Black or African American alone (NH) 154 149 1.95% 1.83%
Native American or Alaska Native alone (NH) 2 5 0.03% 0.06%
Asian alone (NH) 1,830 2,678 23.21% 32.81%
Pacific Islander alone (NH) 0 2 0.00% 0.02%
Some Other Race alone (NH) 3 40 0.04% 0.49%
Mixed Race/Multi-Racial (NH) 160 245 2.03% 3.00%
Hispanic or Latino (any race) 339 396 4.30% 4.85%
Total 7,883 8,163 100.00% 100.00%

Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos can be of any race.

2010 census

As of the census of 2010, there were 7,883 people, 2,939 households, and 2,363 families residing in the village. The population density was 991.6 people per square mile (382.9/km2). There were 3,188 housing units, at an average density of 401.0 per square mile (154.8/km2). The racial makeup was 71.8% White, 2.0% African American, 23.2% Asian, 0.1% Native American, 0.7% some other race, and 2.2% from two or more races. Hispanic or Latino of any race were 4.3% of the population.

There were 2,939 households, out of which 24.2% had children under the age of 18 living with them, 73.6% were headed by married couples living together, 4.7% had a female householder with no husband present, and 19.6% were non-families. 18.2% of all households were made up of individuals, and 12.7% were someone living alone who was 65 years of age or older. The average household size was 2.63, and the average family size was 2.99.

In the village, the population was spread out, with 17.8% under the age of 18, 5.7% from 18 to 24, 13.8% from 25 to 44, 33.6% from 45 to 64, and 29.3% who were 65 years of age or older. The median age was 54.5 years. For every 100 females, there were 92.0 males. For every 100 females age 18 and over, there were 88.8 males.

For the period 2007–11, the estimated median annual income for a household in the village was $132,389, and the median income for a family was $152,209. Male full-time workers had a median income of $104,981 versus $71,961 for females. The per capita income for the village was $79,711. About 1.1% of families and 1.7% of the population were below the poverty line, including 1.7% of those under age 18 and 2.6% of those age 65 or over.

In 2011, 23.2% of Oak Brook's residents were Asian, making it the Chicago suburb with the second highest percentage of Asians.

Economy and business

McDonald's Plaza, the former headquarters of McDonald's

While many Oak Brook residents commute to jobs scattered throughout the Chicago metropolitan area, Oak Brook is also the home of many corporate offices. The world headquarters of McDonald's Corporation was in Oak Brook from 1971, when McDonald's moved into the Oak Brook facility from an office within the Chicago Loop, until 2018, when it moved back to Chicago. Other corporations include Ace Hardware, Blistex, Crowe Horwath, TreeHouse Foods, Federal Signal, Sanford, CenterPoint Properties, Dantech Information Technology, Hub Group and Follett Higher Education Group. Global non-profit organizations such as Lions Clubs International, Zonta International and Institute in Basic Life Principles are also based in Oak Brook.

Top employers

According to the Village's 2011 Comprehensive Annual Financial Report, the top employers in the city are:

# Employer # of Employees
1 Oakbrook Center 3,150
2 McDonald's 3,000
3 Advocate Health Care 1,075
4 Inland Real Estate Corporation 846
5 Ace Hardware 796
6 ADT Security Services 725
7 Newell Rubbermaid 323
8 Follett Higher Education Group 320
9 Lions Clubs International 300
10 Reed Elsevier 230


Public schools

Oak Brook has its own school district, District 53, which includes Brook Forest Elementary School (grades K-5) and Butler Junior High School (grades 6–8). Students that live within the district attend Hinsdale Central High School, District 86. However, some residents of the village are within other DuPage county school districts and attend schools in Elmhurst, Downers Grove or Villa Park.

Elementary schools

  • Brook Forest Elementary School (Butler District 53)
  • Hinsdale Community Consolidated School District 181
  • Elmhurst Community Unit School District 205
  • Downers Grove Elementary School District 58
  • Salt Creek School District 48

Middle schools

  • Paul Butler Jr. High School (Butler District 53)

High schools

  • Hinsdale Township High School District 86 - Hinsdale Central High School
  • Elmhurst Community Unit School District 205 - York Community High School
  • Community High School District 99 - Downers Grove North High School
  • DuPage High School District 88 - Willowbrook High School
  • Westmont Community Unit School District 201 - Westmont High School


  • Community College District 502 - College of DuPage

Private schools

  • Sunshine Montessori of Oakbrook

Notable people

See also

Kids robot.svg In Spanish: Oak Brook para niños

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