There are 7 US Post Offices in Warren County serving a total of 25,524 residents equating to 3,646 residents per post office. It's estimated that approximately 40,739 packages are handled across the 7 county post offices annually. Warren County is a county located in the Northeastern Piedmont region of North Carolina, on the northern border with Virginia. As of the 2010 census, the population was 20,972. Its county seat is Warrenton. It was a center of tobacco and cotton plantations, and later textile mills. The county is home to the historic Haliwa-Saponi Indian tribe, which has received state recognition."