There are 13 US Post Offices in Rutherford County serving a total of 71,889 residents equating to 5,530 residents per post office. It's estimated that approximately 114,743 packages are handled across the 13 county post offices annually. Rutherford County is a county located in the U.S. state of North Carolina. As of the 2010 census, the population was 67,810. Its county seat is Rutherfordton. Rutherford County comprises the Forest City, NC Micropolitan Statistical Area.