High Quality Content by WIKIPEDIA articles! Template:Infobox Chicagoland municipality West Chicago is a city in DuPage County, Illinois, United States. The population was 23,469 at the 2000 census. It was formerly named Turner Junction after its founder, John B. Turner, president of the Galena and Chicago Union Railroad (G&CU) in 1855. The city was initially established around the first junction of railroad lines in Illinois, and today is still served by the Union Pacific/West Metra service via West Chicago station.