There are 5 US Post Offices in Pike County serving a total of 26,069 residents equating to 5,214 residents per post office. It's estimated that approximately 41,609 packages are handled across the 5 county post offices annually. Pike County is a county located in the Appalachian region of the U.S. state of Ohio. As of the 2010 census, the population was 28,709. Its county seat is Waverly. The county is named for explorer Zebulon Pike."