There are 8 US Post Offices in Franklin County serving a total of 37,631 residents equating to 4,704 residents per post office. It's estimated that approximately 60,063 packages are handled across the 8 county post offices annually. Franklin County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 41,052. Its county seat is Winchester. Franklin County is part of the Tullahoma-Manchester, TN Micropolitan Statistical Area."