There are 7 US Post Offices in Dickson County serving a total of 50,624 residents equating to 7,232 residents per post office. It's estimated that approximately 80,802 packages are handled across the 7 county post offices annually. Dickson County is a county located in the U.S. state of Tennessee. As of the 2010 census, the population was 49,666. Its county seat is Charlotte. Dickson County is part of the Nashville-Davidson\u2013Murfreesboro\u2013Franklin, TN Metropolitan Statistical Area. Dickson County is home to Tennessee's oldest courthouse in continuous use, built in 1835. This is the second courthouse in Charlotte as the first one, a log building, was destroyed in the Tornado of 1833, which destroyed all but one building on the courthouse square."