There are 2 US Post Offices in Seminole County serving a total of 9,152 residents equating to 4,576 residents per post office. It's estimated that approximately 14,608 packages are handled across the 2 county post offices annually. Seminole County is a county located in the southwestern corner of U.S. state of Georgia. As of the 2010 census, the population was 8,729. The county seat is Donalsonville."