South Gate, CA population age distribution
A complete breakdown of South Gate'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 | 5,606 | 6.01% |
5 to 9 years | 6,097 | 6.53% |
10 to 14 years | 7,974 | 8.55% |
15 to 19 years | 7,238 | 7.76% |
20 to 24 years | 7,221 | 7.74% |
25 to 29 years | 8,004 | 8.58% |
30 to 34 years | 6,620 | 7.09% |
35 to 39 years | 6,146 | 6.59% |
40 to 44 years | 6,348 | 6.8% |
45 to 49 years | 6,898 | 7.39% |
50 to 54 years | 5,291 | 5.67% |
55 to 59 years | 5,026 | 5.39% |
60 to 64 years | 4,633 | 4.97% |
65 to 69 years | 3,961 | 4.25% |
70 to 74 years | 2,715 | 2.91% |
75 to 79 years | 1,906 | 2.04% |
80 to 84 years | 837 | 0.9% |
85 years and over | 787 | 0.84% |
TABLE OF CONTENTS
South Gate, CA population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

The largest age group in South Gate, CA was for the group of age 25-29 years with a population of 8,004 (8.58%), according to the 2021 American Community Survey.
At the same time, the smallest age group in South Gate, CA was the 85+ years with a population of 787 (0.84%).
South Gate, CA population by age cohort
To better understand the age distribution of South Gate, 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 | 24,166 | 25.9% |
18 to 64 years | 58,936 | 63.16% |
85 years and over | 10,206 | 10.94% |
Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:
- South Gate's population under 18 was 25.90%, compared to the 22.51% nationwide.
- South Gate's working population (between 18 and 64) was 63.16%, compared to 61.45% nationwide.
- South Gate's elderly or the senior population (over 65 age) was 10.94% as compared to 16.04% nationwide.
South Gate, CA population pyramid
Population pyramid for South Gate, 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 South Gate's population pyramid:
- Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for South Gate, CA, is 31.0.
- Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for South Gate, CA, is 16.1.
- Total dependency ratio for South Gate, CA is 47.1.
- Potential support ratio, which is the number of youth (working age population) per elderly, for South Gate, CA is 6.2.

Here's the South Gate, CA's male and female population across different age groups:
Age Group | Population(Male) | Population(Female) | Total Population |
---|---|---|---|
Under 5 years | 3,127 | 2,479 | 5,606 |
5 to 9 years | 3,246 | 2,851 | 6,097 |
10 to 14 years | 3,726 | 4,248 | 7,974 |
15 to 19 years | 3,827 | 3,411 | 7,238 |
20 to 24 years | 3,257 | 3,964 | 7,221 |
25 to 29 years | 3,949 | 4,055 | 8,004 |
30 to 34 years | 3,591 | 3,029 | 6,620 |
35 to 39 years | 3,012 | 3,134 | 6,146 |
40 to 44 years | 3,125 | 3,223 | 6,348 |
45 to 49 years | 3,859 | 3,039 | 6,898 |
50 to 54 years | 2,674 | 2,617 | 5,291 |
55 to 59 years | 2,355 | 2,671 | 5,026 |
60 to 64 years | 2,105 | 2,528 | 4,633 |
65 to 69 years | 1,984 | 1,977 | 3,961 |
70 to 74 years | 1,190 | 1,525 | 2,715 |
75 to 79 years | 787 | 1,119 | 1,906 |
80 to 84 years | 317 | 520 | 837 |
85 years and over | 268 | 519 | 787 |
Things to know
What is the population of South Gate, CA under 18?
South Gate's population under the age of 18 is 24,166, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 25.90% of the total resident population of South Gate, CA.
What is the aging population in South Gate, CA?
South Gate's population aged 65 years and above was 10,206. As per the U.S. Census Bureau's American Community Survey, this population is 10.94% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates