There are 13 US Post Offices in Northampton County serving a total of 21,960 residents equating to 1,689 residents per post office. It's estimated that approximately 35,051 packages are handled across the 13 county post offices annually. Northampton County is a county located in the U.S. state of North Carolina. As of the 2010 census, the population was 22,099. Its county seat is Jackson. Northampton County is part of the Roanoke Rapids, NC Micropolitan Statistical Area, which is also included in the Rocky Mount-Wilson-Roanoke Rapids, NC Combined Statistical Area."