There are 12 US Post Offices in Rowan County serving a total of 70,798 residents equating to 5,900 residents per post office. It's estimated that approximately 113,002 packages are handled across the 12 county post offices annually. Rowan County is a county located in the U.S. state of North Carolina. As of the 2010 census, the population was 138,428. Its county seat is Salisbury. Rowan County is included in the Charlotte metropolitan area."