There are 4 US Post Offices in Greeley County serving a total of 2,739 residents equating to 685 residents per post office. It's estimated that approximately 4,372 packages are handled across the 4 county post offices annually. Greeley County is a county located in the U.S. state of Nebraska. As of the 2010 census, the population was 2,538. Its county seat is Greeley. In the Nebraska license plate system, Greeley County is represented by the prefix 62 (it had the sixty-second-largest number of vehicles registered in the county when the license plate system was established in 1922)."