Los Alamos County, New Mexico Demographics 2026

Population Overview

Los Alamos County is located in New Mexico with a total population of 19,374. It is the 20th most populous county out of 33 in New Mexico.

Age Demographics

The median age in Los Alamos County is 41.1 years. This is 5% higher than the state median of 39.2 years.

Economy, Income & Housing

The median household income in Los Alamos County is $143,188. This is 130% higher than the state median of $62,125. Compared to the national median of $78,538, household income here is 82% higher. The poverty rate stands at 2.9%. This is 84% lower than the state poverty rate of 18.1%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 2.2%. This is 64% lower than the state rate of 6.0%. The median home value is $452,500. Housing costs are 95% higher than the state median of $232,200. The home-value-to-income ratio is 3.2x. 74.6% of occupied housing units are owner-occupied. This homeownership rate is 8% higher than the state average of 69.3%.

Race & Ethnicity

The largest racial or ethnic group in Los Alamos County is White (non-Hispanic), making up 70.3% of the population. Hispanic or Latino residents account for 17.9%. The White (non-Hispanic) population is significantly higher than the state average (70.3% vs 36.5%). The Hispanic or Latino population (17.9%) is well below the state average of 48.1%. The Asian population is significantly higher than the state average (5.0% vs 1.6%).

Education

68.3% of residents aged 25 and older hold a bachelor's degree or higher. This places Los Alamos County in the top 10% of all cities in the state for educational attainment. This is 126% higher than the state rate of 30.2%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 98.3%. Notably, 43.2% of adults hold a graduate or professional degree, indicating a highly educated workforce.