Oak Brook is located in Illinois. Oak Brook, Illinois has a population of 8,045. Oak Brook is less family-centric than the surrounding county with 17% households with children. The county percentage for households with children is 31%.
The median household income in Oak Brook, Illinois is $128,966. The median household income for the surrounding county is $95,086 compared to the national median of $66,222. The median age of people living in Oak Brook is 55.5 years.
The average high temperature in July is 86.8 degrees, with an average low temperature in January of 14.2 degrees. The annual precipitation is 37.94.