There are 8 US Post Offices in Morgan County serving a total of 26,722 residents equating to 3,340 residents per post office. It's estimated that approximately 42,651 packages are handled across the 8 county post offices annually. Morgan County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 21,987. Its county seat is Wartburg. Morgan County is part of the Knoxville, TN Combined Statistical Area.