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San Juan County is one of the 64 counties of the state of Colorado. Based on 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. San Juan County was created on January 31, 1876 from Lake County. The county name is the Spanish language name for "Saint John", 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.
San Juan County is named for the San Juan River and San Juan Mountains.
County QuickFacts: CensusBureau Quick Facts
San Juan County was created in 1876 from parts of La Plata and Lake counties. In 1877 most of San Juan was split off to form Ouray County with a small piece going to the new Gunnison County.
As reported by the Census Bureau, the county has a total area of 388 square miles (1,006 km2), of which, 387 square miles (1,003 km2) of it is land and 1 square miles (2 km2) of it (0.22%) is water. The County is located in the heart of the San Juan Mountains of Colorado, with numerous peaks above 14,000 feet in height.
San Juan county is located in southwest Colorado. The Alpine Loop National Back Country Byway, Colorado Trail, Continental Divide National Scenic Trail, and San Juan Skyway National Scenic Byway are located in San Juan county.
Bordering counties are as follows: