There are 4 US Post Offices in Cheyenne County serving a total of 1,818 residents equating to 455 residents per post office. It's estimated that approximately 2,902 packages are handled across the 4 county post offices annually. Cheyenne County is the sixth-least densely populated of the 64 counties of the U.S. state of Colorado. The county population was 1,836 at 2010 census. The county seat is Cheyenne Wells."