Mountain View, CA population age distribution
A complete breakdown of Mountain View's age demographics from 0 to 85 years, distributed across 18 age groups is listed in the table below.
Age Group | Population | % of Total Population |
---|---|---|
Under 5 years | 5,238 | 6.36% |
5 to 9 years | 5,034 | 6.11% |
10 to 14 years | 4,079 | 4.95% |
15 to 19 years | 3,720 | 4.51% |
20 to 24 years | 4,343 | 5.27% |
25 to 29 years | 8,893 | 10.79% |
30 to 34 years | 9,212 | 11.18% |
35 to 39 years | 7,273 | 8.83% |
40 to 44 years | 7,277 | 8.83% |
45 to 49 years | 5,502 | 6.68% |
50 to 54 years | 4,557 | 5.53% |
55 to 59 years | 3,904 | 4.74% |
60 to 64 years | 4,229 | 5.13% |
65 to 69 years | 2,526 | 3.07% |
70 to 74 years | 2,433 | 2.95% |
75 to 79 years | 1,665 | 2.02% |
80 to 84 years | 1,131 | 1.37% |
85 years and over | 1,393 | 1.69% |
TABLE OF CONTENTS
Mountain View, CA population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

The largest age group in Mountain View, CA was for the group of age 30-34 years with a population of 9,212 (11.18%), according to the 2021 American Community Survey.
At the same time, the smallest age group in Mountain View, CA was the 80-84 years with a population of 1,131 (1.37%).
Mountain View, CA population by age cohort
To better understand the age distribution of Mountain View, CA's population, we divided it into the following 3 cohorts:
- Children : Under the age of 18 years
- Adults (working population): Between the age of 18 and 64 years
- Seniors: 65 years and above

Here's the population for each of the three cohorts.
Age Group | Population | % of Total Population |
---|---|---|
Under 18 years | 16,718 | 20.29% |
18 to 64 years | 56,543 | 68.61% |
85 years and over | 9,148 | 11.1% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Mountain View's population under 18 was 20.29%, compared to the 22.51% nationwide.
- Mountain View's working population (between 18 and 64) was 68.61%, compared to 61.45% nationwide.
- Mountain View's elderly or the senior population (over 65 age) was 11.10% as compared to 16.04% nationwide.
Mountain View, CA population pyramid
Population pyramid for Mountain View, CA is charted below using the estimates from U.S. Census Bureau's American Community Survey 5-Year estimates. A wide base suggests population increase, narrow base indicates declining birth rates.
Key stats from our analysis of the Mountain View's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Mountain View, CA, is 24.4.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Mountain View, CA, is 15.5.
- Total dependency ratio for Mountain View, CA is 39.9.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Mountain View, CA is 6.4.

Here's the Mountain View, CA's male and female population across different age groups:
Age Group | Population(Male) | Population(Female) | Total Population |
---|---|---|---|
Under 5 years | 2,828 | 2,410 | 5,238 |
5 to 9 years | 2,482 | 2,552 | 5,034 |
10 to 14 years | 2,192 | 1,887 | 4,079 |
15 to 19 years | 1,957 | 1,763 | 3,720 |
20 to 24 years | 2,479 | 1,864 | 4,343 |
25 to 29 years | 4,952 | 3,941 | 8,893 |
30 to 34 years | 5,015 | 4,197 | 9,212 |
35 to 39 years | 4,118 | 3,155 | 7,273 |
40 to 44 years | 3,888 | 3,389 | 7,277 |
45 to 49 years | 2,664 | 2,838 | 5,502 |
50 to 54 years | 2,345 | 2,212 | 4,557 |
55 to 59 years | 2,166 | 1,738 | 3,904 |
60 to 64 years | 1,962 | 2,267 | 4,229 |
65 to 69 years | 1,212 | 1,314 | 2,526 |
70 to 74 years | 1,103 | 1,330 | 2,433 |
75 to 79 years | 640 | 1,025 | 1,665 |
80 to 84 years | 419 | 712 | 1,131 |
85 years and over | 628 | 765 | 1,393 |
Things to know
What is the population of Mountain View, CA under 18?
Mountain View's population under the age of 18 is 16,718, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 20.29% of the total resident population of Mountain View, CA.
What is the aging population in Mountain View, CA?
Mountain View's population aged 65 years and above was 9,148. As per the U.S. Census Bureau's American Community Survey, this population is 11.10% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates