Mason County Illinois Section Maps

Mason County is a county in the U.S. state of Illinois. According to the 2020 census, it had a population of 13,086. Its county seat is Havana. The county is named in honor of George Mason, a member of the Virginia legislature who campaigned for the adoption of the United States Bill of Rights.
  • Country: United States
  • State: Illinois
  • Founded: 1841
  • Named after: George Mason
  • Seat: Havana
  • Largest city: Havana
  • Congressional district: 15th

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Data from: en.wikipedia.org