County · Colorado
Alamosa County, Colorado
Alamosa County, Colorado. Alamosa County had 16,688 residents in 2025 by the Census Bureau's estimate, up 1.9% since 2020, slower than Colorado (+4.1%). It holds 3 places (2 cities, villages and boroughs and 1 census-designated) and 5 census tracts. GEOID 08003.
Alamosa County is one of the 3 counties of the Alamosa, CO micropolitan statistical area (the Census Bureau's July 2023 delineation).
Residents, July 2025 estimate
16,688
Census Bureau estimate (no margin published)
2020 Census count: 16,376 · ACS 2020-2024: 16,581
Median household income
$55,397
±$4,512 (90% margin)
Colorado: $95,470
Median home value
$239,100
±$21,277 (90% margin)
Colorado: $539,400
Median gross rent
$907
±$85 (90% margin)
Colorado: $1,761
How many people live in Alamosa County, and is it growing?
The 2020 Census counted 16,376 residents in Alamosa County. The Census Bureau estimates 16,688 for July 1, 2025, up 1.9% since 2020, slower than Colorado (+4.1%). The 2020-2024 American Community Survey puts the population at 16,581 over 723 square miles of land.
| Measure | Alamosa County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Total population | 16,581 | 5,862,189 | +474 |
| Households | 6,648±174 | 2,374,218 | +486 |
| Average household size | 2.35±0.06 | 2.42 | no clear change |
| Housing units | 7,241±45 | 2,589,053 | +217 |
Alamosa County's population since 2000
From 14,966 in 2000 to 16,688 in 2025: up 11.5%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in Alamosa County?
Alamosa County holds 3 places: 2 cities, villages and boroughs (incorporated places) and 1 census-designated place. The largest is Alamosa with 9,849 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Alamosa | 9,806 | $49,688 |
|---|---|---|
| Alamosa East | 1,453 | $76,683 |
| HooperGEOID 0837380 | 81 | $46,875 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in Alamosa County?
The median resident of Alamosa County is 33.2 years old; 23.8% are under 18 and 15.1% are 65 or older. The largest group is Hispanic or Latino residents (of any race) at 48.2%, then non-Hispanic white residents at 45.2%. 5.1% of residents were born outside the United States.
| Measure | Alamosa County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Median age | 33.2±1.0 | 37.7 | +1.4 |
| Under 18 years | 23.8%±0.4 pts | 21.0% | – |
| 65 years and over | 15.1%±0.3 pts | 15.6% | – |
| Hispanic or Latino (any race) | 48.2% | 22.5% | +1.4 pts |
| White alone, not Hispanic | 45.2%±0.6 pts | 64.8% | −2.4 pts |
| Black or African American alone, not Hispanic | 1.7%±0.3 pts | 3.8% | +1.2 pts |
| Asian alone, not Hispanic | 1.0%±0.3 pts | 3.2% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 1.0%±0.5 pts | 0.4% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.1%±0.1 pts | 0.1% | – |
| Two or more races, not Hispanic | 2.4%±0.8 pts | 4.6% | – |
| Some other race alone, not Hispanic | 0.4%±0.4 pts | 0.5% | – |
| Born outside the United States | 5.1%±1.4 pts | 9.8% | −4.0 pts |
| Speak a language other than English at home (age 5+) | 21.2%±3.8 pts | 16.2% | – |
| Civilian veterans (age 18+) | 3.4%±0.9 pts | 7.5% | – |
| With a disability | 19.4%±3.8 pts | 11.4% | – |
| No health insurance coverage | 5.8%±1.8 pts | 7.7% | −6.4 pts |
| High school graduate or higher (age 25+) | 88.6%±3.5 pts | 92.9% | – |
| Bachelor's degree or higher (age 25+) | 32.4%±3.6 pts | 45.7% | +7.4 pts |
| Graduate or professional degree (age 25+) | 14.9%±2.9 pts | 17.6% | – |
| Moved from another state in the past year | 3.9%±1.3 pts | 3.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Alamosa County earn?
Half of Alamosa County's 6,648 households earn less than $55,397 a year (±$4,512), against $95,470 in Colorado. In 2015-2019 the median was $46,169 in 2024 dollars, so it rose by $9,228 after inflation. 17.2% of residents live below the poverty line.
| Measure | Alamosa County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $55,397±$4,512 | $95,470 | +$9,228 |
| Mean household income | $73,625±$6,784 | $128,255 | – |
| Per capita income | $29,946±$2,532 | $52,636 | no clear change |
| People below the poverty line | 17.2%±3.6 pts | 9.4% | −6.3 pts |
| Children under 18 below the poverty line | 17.6%±6.8 pts | 11.1% | no clear change |
| Households receiving SNAP | 28.6%±4.6 pts | 8.5% | – |
| Households with a broadband subscription | 91.8%±2.9 pts | 93.5% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Alamosa County?
Owners occupy 55.9% of Alamosa County's occupied homes and renters 44.1%. The median owner-occupied home is valued at $239,100 by its owner (±$21,277). The median renter pays $907 a month including utilities, and 29.0% of renters pay 35% or more of their income on rent.
| Measure | Alamosa County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $239,100±$21,277 | $539,400 | +$45,266 |
| Median gross rent | $907±$85 | $1,761 | no clear change |
| Renters paying 35% or more of income on rent | 29.0%±7.7 pts | 42.7% | no clear change |
| Median monthly owner costs, with a mortgage | $1,317±$110 | $2,326 | – |
| Owner-occupied homes | 55.9%±4.6 pts | 66.2% | no clear change |
| Housing units | 7,241±45 | 2,589,053 | +217 |
| Homeowner vacancy rate | 0.1%±0.2 pts | 0.8% | – |
| Rental vacancy rate | 3.7%±3.3 pts | 5.1% | – |
| Single-family detached homes | 61.2%±4.1 pts | 61.4% | – |
| Mobile homes | 12.2%±2.5 pts | 3.5% | – |
| Built 2020 or later | 0.9%±0.6 pts | 3.0% | – |
| Built 1939 or earlier | 12.0%±2.4 pts | 7.0% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is Alamosa County building?
Builders took permits for 56 new housing units across Alamosa County in 2025 (42 single-family), 3.4 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Alamosa County get to work?
74.7% of Alamosa County's workers drive alone and 5.0% work from home. The average trip to work takes 15.9 minutes. The unemployment rate in 2020-2024 averaged 3.7%.
| Measure | Alamosa County | Colorado | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 63.4%±3.1 pts | 68.6% | – |
| Unemployment rate | 3.7%±1.4 pts | 4.6% | −5.5 pts |
| Drove alone to work | 74.7%±4.2 pts | 65.1% | – |
| Carpooled | 12.6%±3.5 pts | 7.7% | – |
| Public transportation | 0.1%±0.2 pts | 1.6% | – |
| Walked | 5.9%±1.9 pts | 2.5% | – |
| Worked from home | 5.0%±1.8 pts | 21.0% | +2.6 pts |
| Mean travel time to work | 15.9 min±2.2 | 25.2 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are Alamosa County's census tracts?
Alamosa County is divided into 5 census tracts. Among those with a reliable estimate, median household income runs from $50,028 (Tract 9603) to $70,167 (Tract 9600).
| Tract 960008003960000 | 2,002±270 | $70,167 |
|---|---|---|
| Tract 960108003960100 | 2,628±287 | $61,397 |
| Tract 9602.0108003960201 | 2,334±354 | $65,568 |
| Tract 9602.0208003960202 | 4,027±420 | $54,559 |
| Tract 960308003960300 | 5,590±539 | $50,028 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does Alamosa County compare with Colorado's other counties?
| Measure | Rank |
|---|---|
| Population | 31st of 64 |
| Growth 2020-2025 | 34th of 64 |
| Residents per square mile | 22nd of 64 |
| Median household income | 51st of 64 |
| Median home value | 50th of 64 |
| Median gross rent | 53rd of 63 |
| Poverty rate | 14th of 63 |
| Bachelor's degree or higher | 33rd of 64 |
| Median age | 64th of 64 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Alamosa County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.