San Juan County
There are 1 US Post Offices in San Juan County serving a total of 659 residents equating to 659 residents per post office. It's estimated that approximately 1,052 packages are handled across the 1 county post offices annually. San Juan County is one of the 64 counties of the U.S. state of Colorado. As of the 2010 census, the population was 699, making it the least populous county in Colorado. The county seat and the only incorporated municipality in the county is Silverton. The county name is the Spanish language name for \u201cSaint John\u201d, the name Spanish explorers gave to a river and the mountain range in the area. With a mean elevation of 11,240 feet (3426 meters), San Juan County is the highest county in the United States."