DuPage County
County in Illinois
DuPage County is a county in the U.S. state of Illinois, and one of the collar counties of the Chicago metropolitan area. As of the 2020 census, the population was 932,877, making it Illinois' second-most populous county. Its county seat is... Wikipedia
Cities: Wheaton, Downers Grove, Glen Ellyn, and more
Population: 920,901 (2022)
Highest point: the Mallard Lake Landfill
Area code: 630 and 331
Congressional districts: 3rd, 4th, 6th, 8th, 11th
Founded: February 9, 1839
Largest city: Aurora