There are 7 US Post Offices in Routt County serving a total of 23,108 residents equating to 3,301 residents per post office. It's estimated that approximately 36,883 packages are handled across the 7 county post offices annually. Routt County is one of the 64 counties in the U.S. state of Colorado. As of the 2010 census, the population was 23,509. The county seat is Steamboat Springs. Routt County comprises the Steamboat Springs, CO Micropolitan Statistical Area."