San Marcos, CA population age distributions
A complete breakdown of San Marcos'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 | 6,521 | 6.91% |
| 5 to 9 years | 7,180 | 7.61% |
| 10 to 14 years | 6,963 | 7.38% |
| 15 to 19 years | 7,502 | 7.95% |
| 20 to 24 years | 5,830 | 6.18% |
| 25 to 29 years | 5,476 | 5.8% |
| 30 to 34 years | 6,349 | 6.73% |
| 35 to 39 years | 7,538 | 7.99% |
| 40 to 44 years | 7,406 | 7.85% |
| 45 to 49 years | 6,131 | 6.5% |
| 50 to 54 years | 5,334 | 5.65% |
| 55 to 59 years | 5,441 | 5.77% |
| 60 to 64 years | 4,467 | 4.73% |
| 65 to 69 years | 3,753 | 3.98% |
| 70 to 74 years | 3,137 | 3.32% |
| 75 to 79 years | 2,142 | 2.27% |
| 80 to 84 years | 1,234 | 1.31% |
| 85 years and over | 1,956 | 2.07% |
TABLE OF CONTENTS
San Marcos, CA population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022
FIGURE 1
San Marcos, CA population by age group.
The largest age group is 35 to 39 years with a population of 7,538 (7.99% of the total population).
The largest age group in San Marcos, CA was for the group of age 35 to 39 years with a population of 7,538 (7.99%), according to the 2018-2022 American Community Survey.
At the same time, the smallest age group in San Marcos, CA was the 80 to 84 years with a population of 1,234 (1.31%).
San Marcos, CA population by age cohort
To better understand the age distribution of San Marcos, 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
San Marcos, CA population by age cohort
The largest age group was 18 to 64 years with a population of 57,755 (61.21% of the total population).
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- San Marcos 's population under 18 was 25.84%, compared to the 22.11% nationwide.
- San Marcos's working population (between 18 and 64) was 61.21%, compared to 61.36% nationwide.
- San Marcos's elderly or the senior population (over 65 age) was 12.95% as compared to 16.53% nationwide.
San Marcos, CA population pyramid
Population pyramid for San Marcos, 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 San Marcos's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for San Marcos, CA, is 33.6.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for San Marcos, CA, is 19.9.
- Total dependency ratio for San Marcos, CA is 53.5.
- Potential support ratio, which is the number of youth (working age population) per elderly, for San Marcos, CA is 5.0.
FIGURE 3
San Marcos, CA population pyramid
San Marcos population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
San Marcos, CA population pyramid
Here's the San Marcos, CA's male and female population across different age groups .
| Age Group | Population(Male) | Population(Female) | Total Population |
|---|---|---|---|
| Under 5 years | 3,847 | 2,674 | 6,521 |
| 5 to 9 years | 3,658 | 3,522 | 7,180 |
| 10 to 14 years | 3,677 | 3,286 | 6,963 |
| 15 to 19 years | 3,699 | 3,803 | 7,502 |
| 20 to 24 years | 2,967 | 2,863 | 5,830 |
| 25 to 29 years | 3,010 | 2,466 | 5,476 |
| 30 to 34 years | 3,169 | 3,180 | 6,349 |
| 35 to 39 years | 3,736 | 3,802 | 7,538 |
| 40 to 44 years | 3,924 | 3,482 | 7,406 |
| 45 to 49 years | 3,134 | 2,997 | 6,131 |
| 50 to 54 years | 2,601 | 2,733 | 5,334 |
| 55 to 59 years | 2,543 | 2,898 | 5,441 |
| 60 to 64 years | 2,558 | 1,909 | 4,467 |
| 65 to 69 years | 1,565 | 2,188 | 3,753 |
| 70 to 74 years | 1,297 | 1,840 | 3,137 |
| 75 to 79 years | 979 | 1,163 | 2,142 |
| 80 to 84 years | 460 | 774 | 1,234 |
| 85 years and over | 620 | 1,336 | 1,956 |
Things to know
What is the population of San Marcos, CA under 18?
San Marcos's population under the age of 18 is 24,383, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 25.84% of the total resident population of San Marcos, CA.
What is the aging population in San Marcos, CA?
San Marcos's population aged 65 years and above was 12,222. As per the U.S. Census Bureau's American Community Survey, this population is 12.95% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates