OAK BROOK

There are 3,124 households out of which 26.9% have children under the age of 18 living with them, 76.6% are married couples living together, 4.5% have a female householder with no husband present, and 17.1% are non-families. 15.3% of all households are made up of individuals and 8.9% have someone living alone who is 65 years of age or older. The average household size is 2.74 and the average family size is 3.04.

In the village the population is spread out with 19.6% under the age of 18, 6.9% from 18 to 24, 15.3% from 25 to 44, 36.4% from 45 to 64, and 21.8% who are 65 years of age or older. The median age is 50 years. For every 100 females there are 91.1 males. For every 100 females age 18 and over, there are 89.5 males.

The median income for a household in the village is $146,537, and the median income for a family is $169,718. Males have a median income of $0 versus $40,128 for females. The per capita income for the village is $76,668. 2.1% of the population and 1.4% of families are below the poverty line. Out of the total people living in poverty, 4.7% are under the age of 18 and 0.4% are 65 or older.

Oak Brook hosts the world headquarters of McDonald's Corporation, which include the company's principal training facility, Hamburger University.