Alamosa County's 2026 population is estimated at 16,731, reflecting a 0.13% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Alamosa County is the 30th largest county in Colorado. The 2010 population was 15,515 and has grown 7.84% since 2010.
Data after 2023 is projected based on recent change
Overall: 33.2 years
Female: 34.2 years
Male: 31.5 years
There are 12,642 adults, (2,507 of whom are seniors) in Alamosa County.
Female: 8,303 (50.1%)
Male: 8,278 (49.9%)
The racial composition of Alamosa County includes 57.81% White, 9% other race, 4.11% Native American, and smaller percentages for Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 9,586 | 57.81% |
| Two or more races | 4,312 | 26.01% |
| Other race | 1,492 | 9% |
| Native American | 681 | 4.11% |
| Black or African American | 309 | 1.86% |
| Asian | 188 | 1.13% |
| Native Hawaiian or Pacific Islander | 13 | 0.08% |
Alamosa County 's average per capita income is $39,949. Household income levels show a median of $55,397. The poverty rate stands at 17.22%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $81,208 | - |
| Families | $66,011 | $88,853 |
| Households | $55,397 | $73,625 |
| Non Families | $30,893 | $47,033 |
Average Income
Median Household Income
Poverty Rate
