DeKalb County Illinois

DeKalb County is a county located in the U.S. state of Illinois. As of the 2020 United States census, the population was 100,420. Its county seat is Sycamore. DeKalb County is part of the Chicago–Naperville–Elgin, IL–IN–WI Metropolitan Statistical Area.
  • Country: United States
  • State: Illinois
  • Founded: March 4, 1837
  • Named for: Johann de Kalb
  • Seat: Sycamore
  • Largest city: DeKalb
  • Congressional districts: 11th, 14th, 16th

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Data from: en.wikipedia.org