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

Population trends in
Figure 1: Annual population growth trend for (2010–2024).

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

Population pyramid for

Figure 2: Population distribution by age and gender for 2024.


Los Alamos County, New Mexico Historical Population Data

YearMedian AgePopulation
202439.319,435
202341.119,374
202241.219,253
202141.519,169
202041.818,976
201942.318,625
201842.518,356
201743.018,031
201643.517,895
201543.517,939
201443.117,974
201343.717,979
201244.018,008
201143.718,040
201043.518,091

Los Alamos County, New Mexico Age Group Breakdown (2024)

Age CohortPercentage
Under 55.0%
5–1717.1%
18–245.7%
25–3415.2%
35–5425.2%
55–6413.5%
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.
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