There are 7 US Post Offices in Fulton County serving a total of 34,312 residents equating to 4,902 residents per post office. It's estimated that approximately 54,766 packages are handled across the 7 county post offices annually. Fulton County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 42,698. Its county seat is Wauseon. The county was created in 1850 with land from Henry, Lucas, and Williams counties and is named for Robert Fulton, inventor of the steamboat."