There are 9 US Post Offices in Laramie County serving a total of 105,946 residents equating to 11,772 residents per post office. It's estimated that approximately 169,102 packages are handled across the 9 county post offices annually. Laramie County is a county in the southeastern corner of the U.S. state of Wyoming. As of the 2010 census, the population was 91,738 making it the most populous county in Wyoming. The county seat is Cheyenne, the state capital. The county lies west of the Nebraska state line and north of the Colorado state line. Laramie county comprises the Cheyenne, WY Metropolitan Statistical Area. It is the least populous county that is the most populous in a state. The city of Laramie, Wyoming, actually lies in neighboring Albany County, Wyoming."