There are 6 US Post Offices in Antelope County serving a total of 5,732 residents equating to 955 residents per post office. It's estimated that approximately 9,149 packages are handled across the 6 county post offices annually. Antelope County is a county in the U.S. state of Nebraska. As of the 2010 census, the population was 6,685. Its county seat is Neligh. The county was formed in 1871. It received its name after a group of early settlers killed and ate several pronghorn, which, although not true antelope, are colloquially known by that name. The Ashfall Fossil Beds National Natural Landmark is located within the county. In the Nebraska license plate system, Antelope County is represented by the prefix 26 (it had the 26th-largest number of vehicles registered in the state when the license plate system was established in 1922)."