There are 6 US Post Offices in Warren County serving a total of 42,224 residents equating to 7,037 residents per post office. It's estimated that approximately 67,394 packages are handled across the 6 county post offices annually. Warren County is a county located in the central part of the U.S. state of Tennessee. As of the 2010 census, the population was 39,839. Its county seat is McMinnville. Warren County comprises the McMinnville, TN Micropolitan Statistical Area."