Oak Brook is a village in DuPage County with a small portion in Cook County in Illinois. The population was 7,883 at the 2010 census. 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).
According to the 2010 census, Oak Brook has a total area of 8.279 square miles (21.44 km), of which 7.95 square miles (20.59 km) (or 96.03%) is land and 0.329 square miles (0.85 km) (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.
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/km). There were 3,188 housing units, at an average density of 401.0 per square mile (154.8/km). 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.