Jefferson County Iowa Map

Jefferson County is a county located in the U.S. state of Iowa. As of the 2020 United States Census, the population was 15,663. The county seat is Fairfield. The county was formed in January 1839, and was named for U.S. President Thomas Jefferson.
  • Country: United States
  • State: Iowa
  • Founded: January 21, 1839
  • Named for: Thomas Jefferson
  • Seat: Fairfield
  • Largest city: Fairfield
  • Congressional district: 1st

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Data from: en.wikipedia.org