Los Alamos County, New Mexico Age & Gender Distribution (2024)
Population distribution by age and gender for Los Alamos County, New Mexico
Los Alamos County, New Mexico Age & Gender Statistics (2024)
Total Population
19,435
Median Age
39.3
Male Median
38.7
Female Median
40.6
Los Alamos County, New Mexico Population Growth

Los Alamos County, New Mexico Demographic Trend
Since 2010, the population of has changed by +7.4%%.
+7.4%% Growth
Los Alamos County, New Mexico Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Los Alamos County, New Mexico Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 39.3 | 19,435 |
| 2023 | 41.1 | 19,374 |
| 2022 | 41.2 | 19,253 |
| 2021 | 41.5 | 19,169 |
| 2020 | 41.8 | 18,976 |
| 2019 | 42.3 | 18,625 |
| 2018 | 42.5 | 18,356 |
| 2017 | 43.0 | 18,031 |
| 2016 | 43.5 | 17,895 |
| 2015 | 43.5 | 17,939 |
| 2014 | 43.1 | 17,974 |
| 2013 | 43.7 | 17,979 |
| 2012 | 44.0 | 18,008 |
| 2011 | 43.7 | 18,040 |
| 2010 | 43.5 | 18,091 |
Los Alamos County, New Mexico Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.0% |
| 5–17 | 17.1% |
| 18–24 | 5.7% |
| 25–34 | 15.2% |
| 35–54 | 25.2% |
| 55–64 | 13.5% |
| 65+ | 18.4% |
Dependency Ratios for Los Alamos County, New Mexico
- Total Dependency Ratio:
- 67.8
- Youth Dependency:
- 36.9
- Old-Age Dependency:
- 30.8
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Los Alamos County, New Mexico
The median age in Los Alamos County, New Mexico is 39.3 years.
According to latest Census data, the total population of Los Alamos County, New Mexico is 19,435.
In Los Alamos County, New Mexico, seniors (ages 65+) make up 18.4% of the population, while children under 18 represent 17.1%.
Based on historical data since 2010, the population in Los Alamos County, New Mexico is becoming younger.