Santa Clara County, CA population age distribution
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 | 110,990 | 5.74% |
5 to 9 years | 113,979 | 5.9% |
10 to 14 years | 124,430 | 6.44% |
15 to 19 years | 117,582 | 6.09% |
20 to 24 years | 115,669 | 5.99% |
25 to 29 years | 152,096 | 7.87% |
30 to 34 years | 157,486 | 8.15% |
35 to 39 years | 146,806 | 7.6% |
40 to 44 years | 134,769 | 6.98% |
45 to 49 years | 134,876 | 6.98% |
50 to 54 years | 129,640 | 6.71% |
55 to 59 years | 125,108 | 6.48% |
60 to 64 years | 106,702 | 5.52% |
65 to 69 years | 85,960 | 4.45% |
70 to 74 years | 63,185 | 3.27% |
75 to 79 years | 44,901 | 2.32% |
80 to 84 years | 30,979 | 1.6% |
85 years and over | 36,864 | 1.91% |
TABLE OF CONTENTS
Santa Clara County, CA population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
The largest age group in Santa Clara County, CA was for the group of age 30-34 years with a population of 157,486 (8.15%), according to the 2021 American Community Survey.
At the same time, the smallest age group in Santa Clara County, CA was the 80-84 years with a population of 30,979 (1.60%).
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
Here's the population for each of the three cohorts.
Age Group | Population | % of Total Population |
---|---|---|
Under 18 years | 422,063 | 21.85% |
18 to 64 years | 1,248,070 | 64.6% |
85 years and over | 261,889 | 13.56% |
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 21.85%, compared to the 22.51% nationwide.
- Santa Clara County's working population (between 18 and 64) was 64.60%, compared to 61.45% nationwide.
- Santa Clara County's elderly or the senior population (over 65 age) was 13.56% as compared to 16.04% 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 26.5.
- 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 19.8.
- Total dependency ratio for Santa Clara County, CA is 46.3.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Santa Clara County, CA is 5.0.
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 | 57,514 | 53,476 | 110,990 |
5 to 9 years | 58,968 | 55,011 | 113,979 |
10 to 14 years | 63,370 | 61,060 | 124,430 |
15 to 19 years | 60,307 | 57,275 | 117,582 |
20 to 24 years | 60,422 | 55,247 | 115,669 |
25 to 29 years | 82,254 | 69,842 | 152,096 |
30 to 34 years | 84,345 | 73,141 | 157,486 |
35 to 39 years | 77,321 | 69,485 | 146,806 |
40 to 44 years | 68,836 | 65,933 | 134,769 |
45 to 49 years | 68,589 | 66,287 | 134,876 |
50 to 54 years | 66,286 | 63,354 | 129,640 |
55 to 59 years | 63,066 | 62,042 | 125,108 |
60 to 64 years | 54,500 | 52,202 | 106,702 |
65 to 69 years | 41,121 | 44,839 | 85,960 |
70 to 74 years | 29,105 | 34,080 | 63,185 |
75 to 79 years | 20,683 | 24,218 | 44,901 |
80 to 84 years | 13,090 | 17,889 | 30,979 |
85 years and over | 14,047 | 22,817 | 36,864 |
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 422,063, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 21.85% 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 261,889. As per the U.S. Census Bureau's American Community Survey, this population is 13.56% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates