Clark County, Ohio

county in Ohio, United States

Clark County is a county in the U.S. state of Ohio. As of the 2020 census, the population was 136,001.[1] Its county seat is Springfield.[2] The county was created on March 1, 1818. It was named for General George Rogers Clark,[3] a hero of the American Revolution.


  1. "QuickFacts: Clark County, Ohio". United States Census Bureau. Retrieved August 16, 2023.
  2. "Find a County". National Association of Counties. Archived from the original on 2011-05-31. Retrieved 2011-06-07.
  3. Gannett, Henry (1905). The Origin of Certain Place Names in the United States. Govt. Print. Off. p. 82.