There are 6 US Post Offices in Cherry County serving a total of 4,854 residents equating to 809 residents per post office. It's estimated that approximately 7,748 packages are handled across the 6 county post offices annually. Cherry County is a county in the U.S. state of Nebraska. As of the 2010 census, the population was 5,713. Its county seat is Valentine. The county was named for Lt. Samuel A. Cherry, an Army officer who was stationed at Fort Niobrara and who had been killed in South Dakota in 1881. Cherry County is in the Nebraska Sandhills. In the Nebraska license plate system, Cherry County is represented by the prefix 66 (it had the 66th-largest number of vehicles registered in the state when the license plate system was established in 1922)."