There are 13 US Post Offices in Saunders County serving a total of 20,398 residents equating to 1,569 residents per post office. It's estimated that approximately 32,557 packages are handled across the 13 county post offices annually. Saunders County is a county in the U.S. state of Nebraska. As of the 2010 census, the population was 20,780. Its county seat is Wahoo. Saunders County is included in the Omaha-Council Bluffs, NE-IA Metropolitan Statistical Area. In the Nebraska license plate system, Saunders County is represented by the prefix 6 (the county had the sixth-largest number of vehicles registered in the state when the license plate system was established in 1922)."