There are 7 US Post Offices in Erie County serving a total of 80,050 residents equating to 11,436 residents per post office. It's estimated that approximately 127,769 packages are handled across the 7 county post offices annually. Erie County is a county located in the U.S. state of Ohio. As of the 2010 census, the population was 77,079. Its county seat is Sandusky. The county is named for the Erie tribe, whose name was their word for \"wildcat\". It was formed in 1838 from the northern third of Huron County and a portion of Sandusky County. Erie County comprises the Sandusky, OH Micropolitan Statistical Area, which is also included in the Cleveland-Akron-Canton, OH Combined Statistical Area. It is home to the amusement park Cedar Point."