There are 8 US Post Offices in Anderson County serving a total of 102,998 residents equating to 12,875 residents per post office. It's estimated that approximately 164,396 packages are handled across the 8 county post offices annually. Anderson County is a county located in the U.S. state of Tennessee. As of the 2010 census, its population was 75,129. Its county seat is Clinton. Anderson County is included in the Knoxville, TN Metropolitan Statistical Area."