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Colorado Counties

Colorado currently has sixty-four counties. In February 1866, the first new county, Las Animas, was created. Alamosa was created in 1913, and in 2001, Broomfield was recognized as a city-county, bringing a total of 64 counties.

Alamosa County, Colorado

Alamosa County Education, Geography, and HistoryAlamosa County, Colorado Courthouse

Alamosa County is one of the 64 counties of the state of Colorado. Based on the 2010 census, the population was 15,445. The county seat is Alamosa. Alamosa County was created on March 8, 1913 from Costilla County and Conejos County. The county is named from the Spanish language word for a "grove of cottonwood trees."

Etymology - Origin of Alamosa County Name

The county name is the Spanish language word for a "grove of cottonwood trees."


County QuickFacts: CensusBureau Quick Facts

Alamosa County History

Alamosa County was created by the Colorado legislature on March 8, 1913 out of northeastern Costilla County.

Alamosa County is one of the 64 counties of the State of Colorado of the United States. The county name is the Spanish language word for a "grove of cottonwood trees." The county seat is the City of Alamosa.

Geography: Land and Water

As reported by the Census Bureau, the county has a total area of 724 square miles (1,874 km2), of which, 723 square miles (1,872 km2) of it is land and 1 square miles (2 km2) of it (0.11%) is water.

Alamosa county is located in South Central Colorado. The county has over 723 square miles of flat topography in the San Luis Valley, with a magnificent mountain range scenery. The high plains alpine valley location with a 7,544 foot elevation is bordered by the Sangre De Cristo mountain range to the east and the San Juan mountain range to the west.

Neighboring Counties

Bordering counties are as follows:

  • East: Huerfano County
  • Southeast: Costilla County
  • Southwest: Conejos County
  • West: Rio Grande County
  • Northwest: Saguache County


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