Oak Park, village, Cook County, northeastern Illinois, adjoining Chicago on the west; incorporated 1902. Primarily a residential community, Oak Park is the birthplace and childhood home of the novelist Ernest Hemingway. The architect Frank Lloyd Wright also lived here (1890-1910), and 25 of the village's structures were designed by him. Settled in the 1830s, it was named for a ridge of oak trees that defined its original boundary. Its population expanded following the Chicago fire in 1871. Population 54,887 (1980); 53,648 (1990); 52,524 (2000).
