There are 4 US Post Offices in Lauderdale County serving a total of 29,454 residents equating to 7,364 residents per post office. It's estimated that approximately 47,012 packages are handled across the 4 county post offices annually. Lauderdale County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 27,815. Its county seat is Ripley."