There are 7 US Post Offices in Overton County serving a total of 18,873 residents equating to 2,696 residents per post office. It's estimated that approximately 30,123 packages are handled across the 7 county post offices annually. Overton County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 22,083. Its county seat is Livingston. Overton County is part of the Cookeville, TN Micropolitan Statistical Area."