Oak Brook

Also known as Oak Brook, Illinois, Oak Brook, IL

village in DuPage County in Illinois

Key facts

Country: United States
State: Illinois
Counties: DuPage , Cook
Townships: York , Downers Grove , Proviso
Type: Council–manager
Total: 8.30 sq mi (21.49 km )
Land: 7.98 sq mi (20.66 km )
Water: 0.32 sq mi (0.83 km )
Elevation: 666 ft (203 m)
Density: 1,023.4/sq mi (395.15/km )
Time zone: UTC-6 ( CST )
Summer dst: UTC-5 ( CDT )
Area codes

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Article

Oak Brook is a village in DuPage County and Cook County, Illinois, United States. The population was 8,163 at the 2020 census.

A suburb of Chicago, it contains the headquarters of Ace Hardware, Portillo's Restaurants, Blistex, Federal Signal, CenterPoint Properties, Sanford L.P., TreeHouse Foods, Lions Clubs International, the U.S. Census Bureau Chicago regional office, and former headquarters of McDonald's and Ferrara Candy. The Lizzadro Museum of Lapidary Art moved there in 2019.