Alamosa County, Colorado Demographics 2026

Population Overview

Alamosa County is located in Colorado with a total population of 16,581. It is the 31st most populous county out of 64 in Colorado. The county encompasses 3 Census-designated places.

Age Demographics

The median age in Alamosa County is 33.2 years. This is 12% lower than the state median of 37.7 years.

Economy, Income & Housing

The median household income in Alamosa County is $55,397. This is 42% lower than the state median of $95,470. It is also 31% lower than the national median of $80,734. The poverty rate stands at 17.2%. This is 82% higher than the state poverty rate of 9.4%. The unemployment rate is 3.7%. This is 21% lower than the state rate of 4.6%. The median home value is $239,100. Housing costs are 56% lower than the state median of $539,400. The home-value-to-income ratio is 4.3x. 55.9% of occupied housing units are owner-occupied. This homeownership rate is 15% lower than the state average of 66.2%.

Race & Ethnicity

The largest racial or ethnic group in Alamosa County is Hispanic or Latino, making up 48.2% of the population. White (non-Hispanic) residents account for 45.2%. The Black or African American population (1.7%) is well below the state average of 3.8%. The Hispanic or Latino population is significantly higher than the state average (48.2% vs 22.5%). The Asian population (1.0%) is well below the state average of 3.2%.

Education

32.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 29% lower than the state rate of 45.7%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 88.6%.

Data Sources & Methodology

All figures for Alamosa County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Colorado and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.