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–Murfreesboro–Franklin, 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.