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Alamosa County, Colorado facts for kids

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Alamosa County
Alamosa County Courthouse
Alamosa County Courthouse
Map of Colorado highlighting Alamosa County
Location within the U.S. state of Colorado
Map of the United States highlighting Colorado
Colorado's location within the U.S.
Country  United States
State  Colorado
Founded March 8, 1913
Named for Spanish language word for a grove of cottonwood trees
Seat Alamosa
Largest city Alamosa
 • Total 723 sq mi (1,870 km2)
 • Land 723 sq mi (1,870 km2)
 • Water 0.7 sq mi (2 km2)  0.1%%
 • Estimate 
 • Density 21/sq mi (8/km2)
Time zone UTC−7 (Mountain)
 • Summer (DST) UTC−6 (MDT)
Congressional district 3rd

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."


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


Map of Alamosa County, Colorado
Alamosa County, Colorado

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.


Historical population
Census Pop.
1920 5,148
1930 8,602 67.1%
1940 10,484 21.9%
1950 10,531 0.4%
1960 10,000 −5.0%
1970 11,422 14.2%
1980 11,799 3.3%
1990 13,617 15.4%
2000 14,966 9.9%
2010 15,445 3.2%
Est. 2015 16,496 6.8%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2015

As of the census of 2000, there were 14,966 people, 5,467 households, and 3,651 families residing in the county. The population density was 21 people per square mile (8/km²). There were 6,088 housing units at an average density of 8 per square mile (3/km²). The racial makeup of the county was 71.19% White, 0.97% Black or African American, 2.34% Native American, 0.82% Asian, 0.19% Pacific Islander, 20.34% from other races, and 4.16% from two or more races. 41.41% of the population were Hispanic or Latino of any race.

There were 5,467 households out of which 35.30% had children under the age of 18 living with them, 50.50% were married couples living together, 11.70% had a female householder with no husband present, and 33.20% were non-families. 27.30% of all households were made up of individuals and 8.70% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 3.14.

In the county, the population was spread out with 27.20% under the age of 18, 15.90% from 18 to 24, 26.70% from 25 to 44, 20.60% from 45 to 64, and 9.60% who were 65 years of age or older. The median age was 31 years. For every 100 females there were 99.00 males. For every 100 females age 18 and over, there were 95.30 males.

The median income for a household in the county was $29,447, and the median income for a family was $38,389. Males had a median income of $27,733 versus $22,806 for females. The per capita income for the county was $15,037. About 15.60% of families and 21.30% of the population were below the poverty line, including 27.40% of those under age 18 and 13.90% of those age 65 or over.

In 2000, the largest denominational groups were Catholics (with 5,716 members) and Evangelical Protestants (with 1,755 members). The largest religious bodies were The Catholic Church (with 5,716 adherents) and The Church of Jesus Christ of Latter-day Saints (with 1,155 adherents).




Unincorporated communities

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