San Miguel County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 8,072. The county seat is Telluride. The county is named for the San Miguel River.

San Juan County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 705, 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 "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, San Juan County is the highest county in the United States and also has the two highest elevation houses in the United States; the ‘Bonnie Belle’ above Animas Forks at 11,900’ – 11,950’ elevation and an unnamed house above Picayune Gulch at 12,000’ elevation.