Oak Brook is a village mostly in DuPage County with a small portion in Cook County in Illinois. Per the 2020 census, the population was 8,163. 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). History Oak Brook was originally known as Fullersburg, named after Ben Fuller, an early settler. Oak Brook was incorporated as a village in 1958, due in large part to the efforts of Paul Butler, a prominent civic leader and landowner whose father had first moved to the vicinity in 1898 and opened a dairy farm shortly thereafter. Prior to incorporation, the name Oak Brook was used by local residents to distinguish their community from neighboring Hinsdale and Elmhurst, going back to the founding of the Oak Brook Civic Association almost two decades earlier. The original boundaries were smaller than the present extent of the village, but a considerable amount of land was annexed soon after the founding of the village, including the land that is now the site of the Oakbrook Center shopping mall, which opened in 1962. In 1964 Butler entered a joint venture with the Del E. Webb Corporation of Phoenix, Arizona to increase development of the area. Webb's construction company constructed dozens of buildings in Oak Brook both commercial and residential. The Webb Corporation's involvement in the development of the village lasted into the late 1970s. Paul Butler's interest in sport was reflected in the Oak Brook Sports Core, which features polo fields, a golf course (which was at one time the venue for the Western Open), swimming and tennis facilities, and other recreational facilities not commonly found in a village of this size. Geography According to the 2021 census gazetteer files, Oak Brook has a total area of , of which (or 96.11%) is land and (or 3.89%) is water. Oak Brook is located about 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