Alamosa County, Colorado

Location of Colorado: 

Location of Alamosa County in Colorado: 

Alamosa County is one of the 64 counties of the U.S. state of Colorado. As of the 2010 census, the population was 15,445. The county seat is Alamosa. The county name is the Spanish language word for a “grove of cottonwood trees.”

For more information on Alamosa County, click here.


According to the U.S. Census Bureau, the county has a total area of 723 square miles (1,870 km2), of which 723 square miles (1,870 km2) is land and 0.7 square miles (1.8 km2) (0.1%) is water.

Adjacent counties

National protected area

Other protected areas

Scenic trails


Alamosa is served by San Luis Valley Regional Airport. The only commercial service is to Denver.

For information regarding property taxes in Alamosa County, click here.

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