There are 15 US Post Offices in Pitt County serving a total of 224,214 residents equating to 14,948 residents per post office. It's estimated that approximately 357,871 packages are handled across the 15 county post offices annually. Pitt County is a county located in the U.S. state of North Carolina. As of the 2010 census, the population was 168,148. Its county seat is Greenville. Pitt County comprises the Greenville, NC Metropolitan Statistical Area. As one of the fastest growing centers in the state, the county has seen a population boom since 1990."