There are 13 US Post Offices in Holmes County serving a total of 34,277 residents equating to 2,637 residents per post office. It's estimated that approximately 54,710 packages are handled across the 13 county post offices annually. Holmes County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 42,366. Its county seat is Millersburg. The county was formed in 1824 from portions of Coshocton, Tuscarawas and Wayne counties and organized the following year. It was named after Andrew Holmes, an officer killed in the War of 1812. Holmes County is home to an Amish community, the largest in the world, that draws many visitors to the county."