Alamosa County Population

1920–2026

16,685

2026 projection

1.9% since 2020 (increase)

05K10K15K20K192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Alamosa County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202616,685-30.02%
202516,688-30.02%
202416,691-40.02%
202316,695+650.39%
202216,630+460.28%
202116,584+2071.26%
202016,377+1771.09%
201916,200-350.22%
201816,235+1330.83%
201716,102+550.34%

Showing 10 of 25 years.

Alamosa County Demographics

33.2median age

Median age

Female34.2 yrs
Male31.5 yrs

Adults

12,642
2,507 seniors (65+) · 20% of adults10,135 other adults

Sex

Female 50.1% · 8,303Male 49.9% · 8,278

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 166 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Alamosa County Income

$55,397median household income

Median household income

$55,397

Half of households earn more, half earn less

Median earnings

$39,949

Typical yearly pay for a worker 25 or older.

Poverty rate

17.2%

About 1 in 6 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Alamosa County Marital Status

40% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married40%37%44%
Never married38%46%30%
Divorced15%13%17%
Widowed5%2%8%
Separated2%2%1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201