There are 8 US Post Offices in Logan County serving a total of 22,666 residents equating to 2,833 residents per post office. It's estimated that approximately 36,177 packages are handled across the 8 county post offices annually. Logan County is one of the 64 counties in the U.S. state of Colorado. As of the 2010 census, the population was 22,709. The county seat is Sterling. The county was named for General John A. Logan. Logan County comprises the Sterling, CO Micropolitan Statistical Area."