Santa Clara County, CA population age distributions
A complete breakdown of Santa Clara County'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 | 104,468 | 5.45% |
| 5 to 9 years | 108,504 | 5.66% |
| 10 to 14 years | 121,002 | 6.31% |
| 15 to 19 years | 120,989 | 6.31% |
| 20 to 24 years | 120,463 | 6.28% |
| 25 to 29 years | 148,762 | 7.76% |
| 30 to 34 years | 156,681 | 8.17% |
| 35 to 39 years | 144,516 | 7.54% |
| 40 to 44 years | 132,619 | 6.92% |
| 45 to 49 years | 131,136 | 6.84% |
| 50 to 54 years | 127,844 | 6.67% |
| 55 to 59 years | 122,282 | 6.38% |
| 60 to 64 years | 107,622 | 5.61% |
| 65 to 69 years | 86,155 | 4.49% |
| 70 to 74 years | 64,700 | 3.38% |
| 75 to 79 years | 47,221 | 2.46% |
| 80 to 84 years | 33,155 | 1.73% |
| 85 years and over | 38,712 | 2.02% |
TABLE OF CONTENTS
Santa Clara County, CA population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
Santa Clara County, CA population by age group.
The largest age group is 30 to 34 years with a population of 156,681 (8.17% of the total population).
The largest age group in Santa Clara County, CA was for the group of age 30 to 34 years with a population of 156,681 (8.17%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in Santa Clara County, CA was the 80 to 84 years with a population of 33,155 (1.73%).
Santa Clara County, CA population by age cohort
To better understand the age distribution of Santa Clara County, 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
FIGURE 2
Santa Clara County, CA population by age cohort
The largest age group was 18 to 64 years with a population of 1.24 million (64.75% of the total population).
Santa Clara County, CA population by age cohort
Here's the population for each of the three cohorts.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 18 years | 405,816 | 21.17% |
| 18 to 64 years | 1,241,072 | 64.75% |
| 65 years and over | 269,943 | 14.08% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Santa Clara County 's population under 18 was 21.17%, compared to the 22.11% nationwide.
- Santa Clara County's working population (between 18 and 64) was 64.75%, compared to 61.36% nationwide.
- Santa Clara County's elderly or the senior population (over 65 age) was 14.08% as compared to 16.53% nationwide.
Santa Clara County, CA population pyramid
Population pyramid for Santa Clara County, 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 Santa Clara County's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Santa Clara County, CA, is 25.4.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Santa Clara County, CA, is 20.6.
- Total dependency ratio for Santa Clara County, CA is 46.0.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Santa Clara County, CA is 4.9.
FIGURE 3
Santa Clara County, CA population pyramid
Santa Clara County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Santa Clara County, CA population pyramid
Here's the Santa Clara County, CA's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 53,869 | 50,599 | 104,468 |
| 5 to 9 years | 56,386 | 52,118 | 108,504 |
| 10 to 14 years | 61,734 | 59,268 | 121,002 |
| 15 to 19 years | 61,993 | 58,996 | 120,989 |
| 20 to 24 years | 62,975 | 57,488 | 120,463 |
| 25 to 29 years | 80,877 | 67,885 | 148,762 |
| 30 to 34 years | 84,677 | 72,004 | 156,681 |
| 35 to 39 years | 76,679 | 67,837 | 144,516 |
| 40 to 44 years | 68,479 | 64,140 | 132,619 |
| 45 to 49 years | 67,057 | 64,079 | 131,136 |
| 50 to 54 years | 65,607 | 62,237 | 127,844 |
| 55 to 59 years | 61,806 | 60,476 | 122,282 |
| 60 to 64 years | 55,547 | 52,075 | 107,622 |
| 65 to 69 years | 41,171 | 44,984 | 86,155 |
| 70 to 74 years | 30,142 | 34,558 | 64,700 |
| 75 to 79 years | 21,194 | 26,027 | 47,221 |
| 80 to 84 years | 13,845 | 19,310 | 33,155 |
| 85 years and over | 14,914 | 23,798 | 38,712 |
Things to know
What is the population of Santa Clara County, CA under 18?
Santa Clara County's population under the age of 18 is 405,816, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 21.17% of the total resident population of Santa Clara County, CA.
What is the aging population in Santa Clara County, CA?
Santa Clara County's population aged 65 years and above was 269,943. As per the U.S. Census Bureau's American Community Survey, this population is 14.08% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates