There are 8 US Post Offices in Bertie County serving a total of 22,125 residents equating to 2,766 residents per post office. It's estimated that approximately 35,314 packages are handled across the 8 county post offices annually. Bertie County is a county located in the U.S. state of North Carolina. As of the 2010 census, the population was 21,282. Its county seat is Windsor. The county was created in 1722 as Bertie Precinct and gained county status in 1739. The Sans Souci Ferry is the county's only ferry."