There are 8 US Post Offices in Durham County serving a total of 213,600 residents equating to 26,700 residents per post office. It's estimated that approximately 340,929 packages are handled across the 8 county post offices annually. Durham County is a county located in the U.S. state of North Carolina. As of the 2010 census, the population was 267,587. Its county seat is Durham. Durham County is the core of the Durham-Chapel Hill, NC Metropolitan Statistical Area, which is also included in the Raleigh-Durham-Cary, NC Combined Statistical Area, which had a population of 1,749,525 in 2010."