Oakbrook Terrace is a city in DuPage County, Illinois, and is a suburb of Chicago. As of the 2010 census, the city had a total population of 2,134, which was estimated to have increased to 2,155 by July 2012. It is the smallest town in DuPage County, in terms of area and population.
According to the 2010 census, Oakbrook Terrace has a total area of 1.278 square miles (3.31 km), of which 1.25 square miles (3.24 km) (or 97.81%) is land and 0.028 square miles (0.07 km) (or 2.19%) is water.
As of the census of 2000, there were 2,300 people, 1,198 households, and 553 families residing in the city. The population density was 1,651.2 people per square mile (638.9/km²). There were 1,327 housing units at an average density of 952.7 per square mile (368.6/km²). The racial makeup of the city was 80.52% White, 4.13% African American, 12.22% Asian, 0.04% Pacific Islander, 0.87% from other races, and 2.22% from two or more races. Hispanic or Latino of any race were 4.13% of the population.
There were 1,198 households out of which 14.2% had children under the age of 18 living with them, 37.9% were married couples living together, 6.6% had a female householder with no husband present, and 53.8% were non-families. 46.7% of all households were made up of individuals and 13.5% had someone living alone who was 65 years of age or older. The average household size was 1.92 and the average family size was 2.77.
In the city, the population was spread out with 13.6% under the age of 18, 7.8% from 18 to 24, 33.6% from 25 to 44, 27.4% from 45 to 64, and 17.7% who were 65 years of age or older. The median age was 41 years. For every 100 females, there were 89.9 males. For every 100 females age 18 and over, there were 86.8 males.
The median income for a household in the city was $59,148, and the median income for a family was $85,374. Males had a median income of $60,563 versus $45,000 for females. The per capita income for the city was $44,345. About 2.7% of families and 3.3% of the population were below the poverty line, including 2.2% of those under age 18 and 10.1% of those age 65 or over.