Hardin County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 32,058. Its county seat is Kenton. The county was created in 1820 and later organized in 1833. It is named for John Hardin, an officer in the American Revolution.
Two newspapers, the daily The Kenton Times of Kenton and the weekly The Ada Herald of Ada, operate in Hardin County.
Radio stations include WKTN of Kenton and WONB of Ada, the radio station at Ohio Northern University.