Johnson County, Illinois

county in Illinois, United States

Johnson County is a county in the U.S. state of Illinois. According to the 2020 census, it has a population of 13,308.[1] The county seat is Vienna.[2] Johnson County was founded in 1812 and named for Richard M. Johnson, who was then a U.S. Congressman from Kentucky.[3]

References

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  1. "QuickFacts: Johnson County, Illinois". United States Census Bureau. Retrieved August 11, 2023.
  2. "Find a County". National Association of Counties. Archived from the original on 2015-05-10. Retrieved 2011-06-07.
  3. Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. p. 169.