There are 5 US Post Offices in Hickman County serving a total of 23,346 residents equating to 4,669 residents per post office. It's estimated that approximately 37,263 packages are handled across the 5 county post offices annually. Hickman County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 24,690. Its county seat is Centerville. Hickman County is part of the Nashville-Davidson\u2013Murfreesboro\u2013Franklin, TN Metropolitan Statistical Area."