Santa Ana, CA population age distribution
A complete breakdown of Santa Ana'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 | 20,121 | 6.41% |
5 to 9 years | 20,441 | 6.51% |
10 to 14 years | 23,973 | 7.64% |
15 to 19 years | 24,010 | 7.65% |
20 to 24 years | 24,559 | 7.83% |
25 to 29 years | 28,111 | 8.96% |
30 to 34 years | 24,246 | 7.73% |
35 to 39 years | 23,021 | 7.34% |
40 to 44 years | 21,163 | 6.74% |
45 to 49 years | 19,763 | 6.3% |
50 to 54 years | 20,423 | 6.51% |
55 to 59 years | 18,651 | 5.94% |
60 to 64 years | 13,975 | 4.45% |
65 to 69 years | 11,172 | 3.56% |
70 to 74 years | 8,039 | 2.56% |
75 to 79 years | 4,477 | 1.43% |
80 to 84 years | 3,157 | 1.01% |
85 years and over | 4,516 | 1.44% |
TABLE OF CONTENTS
Santa Ana, CA population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

The largest age group in Santa Ana, CA was for the group of age 25-29 years with a population of 28,111 (8.96%), according to the 2021 American Community Survey.
At the same time, the smallest age group in Santa Ana, CA was the 80-84 years with a population of 3,157 (1.01%).
Santa Ana, CA population by age cohort
To better understand the age distribution of Santa Ana, 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 | 78,465 | 25% |
18 to 64 years | 203,992 | 65% |
85 years and over | 31,361 | 9.99% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- Santa Ana's population under 18 was 25.00%, compared to the 22.51% nationwide.
- Santa Ana's working population (between 18 and 64) was 65.00%, compared to 61.45% nationwide.
- Santa Ana's elderly or the senior population (over 65 age) was 9.99% as compared to 16.04% nationwide.
Santa Ana, CA population pyramid
Population pyramid for Santa Ana, 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 Ana's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Santa Ana, CA, is 29.6.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Santa Ana, CA, is 14.4.
- Total dependency ratio for Santa Ana, CA is 44.0.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Santa Ana, CA is 6.9.

Here's the Santa Ana, CA's male and female population across different age groups:
Age Group | Population(Male) | Population(Female) | Total Population |
---|---|---|---|
Under 5 years | 10,300 | 9,821 | 20,121 |
5 to 9 years | 11,087 | 9,354 | 20,441 |
10 to 14 years | 12,314 | 11,659 | 23,973 |
15 to 19 years | 12,297 | 11,713 | 24,010 |
20 to 24 years | 13,094 | 11,465 | 24,559 |
25 to 29 years | 14,811 | 13,300 | 28,111 |
30 to 34 years | 13,083 | 11,163 | 24,246 |
35 to 39 years | 12,530 | 10,491 | 23,021 |
40 to 44 years | 10,751 | 10,412 | 21,163 |
45 to 49 years | 10,182 | 9,581 | 19,763 |
50 to 54 years | 10,091 | 10,332 | 20,423 |
55 to 59 years | 10,144 | 8,507 | 18,651 |
60 to 64 years | 7,079 | 6,896 | 13,975 |
65 to 69 years | 5,229 | 5,943 | 11,172 |
70 to 74 years | 3,539 | 4,500 | 8,039 |
75 to 79 years | 2,056 | 2,421 | 4,477 |
80 to 84 years | 1,129 | 2,028 | 3,157 |
85 years and over | 1,620 | 2,896 | 4,516 |
Things to know
What is the population of Santa Ana, CA under 18?
Santa Ana's population under the age of 18 is 78,465, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 25.00% of the total resident population of Santa Ana, CA.
What is the aging population in Santa Ana, CA?
Santa Ana's population aged 65 years and above was 31,361. As per the U.S. Census Bureau's American Community Survey, this population is 9.99% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates