Los Alamos County, New Mexico
Located in New Mexico, Los Alamos County has a population of 19,435 residents and a median age of 39.3 years, making it the #1,913 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 3.5%. The median home value is $495,800, and the median household income is $147,139, which is 96% above the national median.
Demographics
Los Alamos County has a population of 19,435, making it the #1,913 most populous county in the US. The median age is 39.3 years, which is 1.0% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Los Alamos County is $147,139, ranking #8 out of 3,222 counties — 95.8% above the national median. The poverty rate is 3.5% and unemployment stands at 0.6%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Los Alamos County is $495,800 (+75.9% vs national). Renters pay a median of $1,375/mo and the homeownership rate is 74.8%.
Median Home Value Trend
Rankings →Household Type
Education
In Los Alamos County, 69.7% of adults age 25+ hold a bachelor's degree or higher, which is 107.0% above the national average, ranking #3 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Los Alamos County is 83.0 years. 8.8% of adults report poor or fair health and 2.1% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
7.8% of adults in Los Alamos County smoke , 22.4% are obese , and 20.4% report excessive drinking. The drug overdose death rate is 22.7 per 100,000.
Adult Smoking Trend
Safety
The suicide rate is 11.8 per 100,000. Motor vehicle deaths occur at a rate of 9.8 per 100,000.
Suicide Rate Trend
Families & Children
3.4% of children in Los Alamos County live in poverty . The teen birth rate is 3.7 per 1,000 females age 15–19.
Teen Birth Rate Trend
Civic & Transportation
Voter turnout in Los Alamos County is 87.4%. The mean commute time is 16.8 min, which is 39.2% below the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Los Alamos County voted Democratic with a margin of 30.2%. The vote was 63.4% Dem / 33.2% Rep. Compared to 2020, the margin shifted +3.6 toward Democrats .
Vote Share Over Time
About Los Alamos County, New Mexico
Los Alamos County, New Mexico has a total population of 19,435, making it the 1,913th most populous county in the United States. The median age in Los Alamos County is 39.3 years, which is 1.0% above the national median of 38.9 years.
The median household income in Los Alamos County is $147,139, which ranks #8 of 3,222 counties nationwide. This is 95.8% above the national median of $75,149. The poverty rate is 3.5%, lower than the national rate of 12.6%. The unemployment rate stands at 0.6%.
The median home value in Los Alamos County is $495,800, 75.9% above the national median. Renters in Los Alamos County pay a median gross rent of $1,375 per month. The homeownership rate is 74.8%, compared to the national rate of 64.4%.
In Los Alamos County, 69.7% of residents aged 25 and older hold a bachelor's degree or higher, 107.0% above the national average of 33.7%. Health insurance coverage stands at 97.5% of the population. The average commute time for workers is 16.8 min.
Los Alamos County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 69.8% of the population, followed by Hispanic or Latino (18.0%) and Two or More Races (5.3%).
All data for Los Alamos County, New Mexico comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.