There are 9 US Post Offices in Hardin County serving a total of 31,900 residents equating to 3,544 residents per post office. It's estimated that approximately 50,916 packages are handled across the 9 county post offices annually. 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."