McDonough County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 27,238. Its county seat is Macomb, which is also the home of Western Illinois University.
McDonough County is part of the Macomb, IL... Wikipedia
Cities: Macomb, Colchester, Blandinsville, and more
County seat: Macomb
Population: 26,861 (2022)
Founded: January 25, 1826
Named for: Thomas Macdonough