There are 5 US Post Offices in Hall County serving a total of 36,913 residents equating to 7,383 residents per post office. It's estimated that approximately 58,917 packages are handled across the 5 county post offices annually. Hall County is a county in the U.S. state of Nebraska. As of the 2010 census, the population was 58,607, making it Nebraska's fourth-most populous county. Its county seat is Grand Island. The county was formed in 1858 and named after Augustus Hall, an early judge of this territory. Hall County is part of the Grand Island, NE Metropolitan Statistical Area. In the Nebraska license plate system, Hall County is represented by the prefix 8. Hall County had the eighth-largest number of vehicles registered in the county when the license plate system was established in 1922."