Alamosa County, Colorado

Alamosa County
Alamosa County Courthouse
Location within the U.S. state of Colorado
Colorado's location within the U.S.
Coordinates: 37°34′N 105°47′W / 37.57°N 105.78°W / 37.57; -105.78
Country United States
State Colorado
FoundedMarch 8, 1913
Named afterSpanish language word for a grove of cottonwood trees
SeatAlamosa
Largest cityAlamosa
Area
  Total
723 sq mi (1,870 km2)
  Land723 sq mi (1,870 km2)
  Water0.7 sq mi (2 km2)  0.1%
Population
 (2020)
  Total
16,376
  Estimate 
(2024)
16,689
  Density23/sq mi (8.7/km2)
Time zoneUTC−7 (Mountain)
  Summer (DST)UTC−6 (MDT)
Congressional district3rd
Websitealamosacounty.colorado.gov

Alamosa County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 16,376. The county seat is Alamosa. The county name is the Spanish language word for a grove of cottonwood trees.