San Francisco County, CA Population by Age

The median age in San Francisco County, CA is 38.7, as per 2021 ACS 5-Year Estimates. Of the total population, 11.63% were under the age of 15, 19.67% aged 15 to 29, 52.77% aged 30 to 64, 13.41% aged 65 to 84, and 2.52% were 85 years of age and older.
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Updated Sep 17, 2023

San Francisco County, CA population age distribution

A complete breakdown of San Francisco 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 38,219 4.41%
5 to 9 years 30,641 3.54%
10 to 14 years 31,831 3.68%
15 to 19 years 31,520 3.64%
20 to 24 years 44,753 5.17%
25 to 29 years 94,090 10.87%
30 to 34 years 101,572 11.73%
35 to 39 years 79,269 9.15%
40 to 44 years 60,203 6.95%
45 to 49 years 58,302 6.73%
50 to 54 years 55,772 6.44%
55 to 59 years 52,366 6.05%
60 to 64 years 49,442 5.71%
65 to 69 years 43,329 5%
70 to 74 years 35,260 4.07%
75 to 79 years 21,605 2.49%
80 to 84 years 15,965 1.84%
85 years and over 21,794 2.52%
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San Francisco County, CA population by age group

Key stats
176,964
Population under 25 years
335,134
Population aged 25-44
215,882
Population aged 45-64
137,953
Population aged 65+

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

The graph shows San Francisco County's population by age group, with age group on x-axis and the respective age group's percent of the total population on y-axis
San Francisco County, CA population by age group. The largest age group was 30-34 years with a poulation of 101,572 (11.73% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in San Francisco County, CA was for the group of age 30-34 years with a population of 101,572 (11.73%), according to the 2021 American Community Survey.

At the same time, the smallest age group in San Francisco County, CA was the 80-84 years with a population of 15,965 (1.84%).

San Francisco County, CA population by age cohort

To better understand the age distribution of San Francisco 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
The pie chart shows San Francisco County's population divided into segments, with each segment representing an age cohort. The area of each segment is in the same proportion of a circle as the population of the cohort is of the total population.
San Francisco County, CA population by age cohorts (Children: Under 18 years; Working population: 18-64 years; Senior population: 65 years or more). The largest age group was 18 - 64 years with a poulation of 609,786 (70.42% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the population for each of the three cohorts.

Age Group Population % of Total Population
Under 18 years 118,194 13.65%
18 to 64 years 609,786 70.42%
85 years and over 137,953 15.93%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • San Francisco County's population under 18 was 13.65%, compared to the 22.51% nationwide.
  • San Francisco County's working population (between 18 and 64) was 70.42%, compared to 61.45% nationwide.
  • San Francisco County's elderly or the senior population (over 65 age) was 15.93% as compared to 16.04% nationwide.

San Francisco County, CA population pyramid

Population pyramid for San Francisco 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 San Francisco County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for San Francisco County, CA, is 16.1.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for San Francisco County, CA, is 22.0.
  • Total dependency ratio for San Francisco County, CA is 38.0.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for San Francisco County, CA is 4.5.
The graph shows San Francisco County's population across different age group and gender, with population on x-axis and population y-axis. The male population is plotted on the left in blue color whereas the female population is plotted on the right in pink color.
San Francisco County, CA population pyramid i.e. San Francisco County population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the San Francisco County, CA's male and female population across different age groups:

Age Group Population(Male) Population(Female) Total Population
Under 5 years 19,522 18,697 38,219
5 to 9 years 15,728 14,913 30,641
10 to 14 years 16,329 15,502 31,831
15 to 19 years 15,266 16,254 31,520
20 to 24 years 21,883 22,870 44,753
25 to 29 years 48,314 45,776 94,090
30 to 34 years 53,429 48,143 101,572
35 to 39 years 43,375 35,894 79,269
40 to 44 years 31,001 29,202 60,203
45 to 49 years 31,470 26,832 58,302
50 to 54 years 30,560 25,212 55,772
55 to 59 years 28,367 23,999 52,366
60 to 64 years 25,300 24,142 49,442
65 to 69 years 21,683 21,646 43,329
70 to 74 years 16,492 18,768 35,260
75 to 79 years 10,189 11,416 21,605
80 to 84 years 6,913 9,052 15,965
85 years and over 7,832 13,962 21,794
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Things to know

What is the population of San Francisco County, CA under 18?

San Francisco County's population under the age of 18 is 118,194, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 13.65% of the total resident population of San Francisco County, CA.

What is the aging population in San Francisco County, CA?

San Francisco County's population aged 65 years and above was 137,953. As per the U.S. Census Bureau's American Community Survey, this population is 15.93% of the entire population.

References

Datasets

San Francisco County, CA Age Group Population Dataset: A complete breakdown of San Francisco County age demographics from 0 to 85 years, distributed across 18 age groups
ACS
Free
Neilsberg
CSV, JSON
2017-2021
CC BY 4.0
About this dataset

Context

The dataset tabulates the San Francisco County population distribution across 18 age groups. It lists the population in each age group along with the percentage population relative of the total population for San Francisco County. The dataset can be utilized to understand the population distribution of San Francisco County by age. For example, using this dataset, we can identify the largest age group in San Francisco County.

Key observations

The largest age group in San Francisco County, CA was for the group of age 30-34 years with a population of 101,572 (11.73%), according to the 2021 American Community Survey. At the same time, the smallest age group in San Francisco County, CA was the 80-84 years with a population of 15,965 (1.84%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

San Francisco County population by age group

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Age groups:

  • Under 5 years
  • 5 to 9 years
  • 10 to 14 years
  • 15 to 19 years
  • 20 to 24 years
  • 25 to 29 years
  • 30 to 34 years
  • 35 to 39 years
  • 40 to 44 years
  • 45 to 49 years
  • 50 to 54 years
  • 55 to 59 years
  • 60 to 64 years
  • 65 to 69 years
  • 70 to 74 years
  • 75 to 79 years
  • 80 to 84 years
  • 85 years and over

Variables / Data Columns

  • Age Group: This column displays the age group in consideration
  • Population: The population for the specific age group in the San Francisco County is shown in this column.
  • % of Total Population: This column displays the population of each age group as a proportion of San Francisco County total population. Please note that the sum of all percentages may not equal one due to rounding of values.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for San Francisco County Population by Age. You can refer the same here

San Francisco County, CA Age Cohorts Dataset: Children, Working Adults, and Seniors in San Francisco County - Population and Percentage Analysis
ACS
Free
Neilsberg
CSV, JSON
2017-2021
CC BY 4.0
About this dataset

Context

The dataset tabulates the San Francisco County population by age cohorts (Children: Under 18 years; Working population: 18-64 years; Senior population: 65 years or more). It lists the population in each age cohort group along with its percentage relative to the total population of San Francisco County. The dataset can be utilized to understand the population distribution across children, working population and senior population for dependency ratio, housing requirements, ageing, migration patterns etc.

Key observations

The largest age group was $b3_v1 with a poulation of $b3_v2 ($b3_v3 of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

San Francisco County population by age cohort

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Age cohorts:

  • Under 18 years
  • 18 to 64 years
  • 65 years and over

Variables / Data Columns

  • Age Group: This column displays the age cohort for the San Francisco County population analysis. Total expected values are 3 groups ( Children, Working Population and Senior Population).
  • Population: The population for the age cohort in San Francisco County is shown in the following column.
  • Percent of Total Population: The population as a percent of total population of the San Francisco County is shown in the following column.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for San Francisco County Population by Age. You can refer the same here

San Francisco County, CA Population Pyramid Dataset: Age Groups, Male and Female Population, and Total Population for Demographics Analysis
ACS
Free
Neilsberg
CSV, JSON
2017-2021
CC BY 4.0
About this dataset

Context

The dataset tabulates the data for the San Francisco County, CA population pyramid, which represents the San Francisco County population distribution across age and gender, using estimates from the U.S. Census Bureau American Community Survey 5-Year estimates. It lists the male and female population for each age group, along with the total population for those age groups. Higher numbers at the bottom of the table suggest population growth, whereas higher numbers at the top indicate declining birth rates. Furthermore, the dataset can be utilized to understand the youth dependency ratio, old-age dependency ratio, total dependency ratio, and potential support ratio.

Key observations

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for San Francisco County, CA, is 16.1.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for San Francisco County, CA, is 22.0.
  • Total dependency ratio for San Francisco County, CA is 38.0.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for San Francisco County, CA is 4.5.

San Francisco County population pyramid

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Age groups:

  • Under 5 years
  • 5 to 9 years
  • 10 to 14 years
  • 15 to 19 years
  • 20 to 24 years
  • 25 to 29 years
  • 30 to 34 years
  • 35 to 39 years
  • 40 to 44 years
  • 45 to 49 years
  • 50 to 54 years
  • 55 to 59 years
  • 60 to 64 years
  • 65 to 69 years
  • 70 to 74 years
  • 75 to 79 years
  • 80 to 84 years
  • 85 years and over

Variables / Data Columns

  • Age Group: This column displays the age group for the San Francisco County population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the San Francisco County for the selected age group is shown in the following column.
  • Population (Female): The female population in the San Francisco County for the selected age group is shown in the following column.
  • Total Population: The total population of the San Francisco County for the selected age group is shown in the following column.

Good to know

Margin of Error

Data in the dataset are based on the estimates and are subject to sampling variability and thus a margin of error. Neilsberg Research recommends using caution when presening these estimates in your research.

Custom data

If you do need custom data for any of your research project, report or presentation, you can contact our research staff at research@neilsberg.com for a feasibility of a custom tabulation on a fee-for-service basis.

Inspiration

Neilsberg Research Team curates, analyze and publishes demographics and economic data from a variety of public and proprietary sources, each of which often includes multiple surveys and programs. The large majority of Neilsberg Research aggregated datasets and insights is made available for free download at https://www.neilsberg.com/research/.

Recommended for further research

This dataset is a part of the main dataset for San Francisco County Population by Age. You can refer the same here

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Neilsberg Research team are data scientists with expertise in processing, analysis and visualization of big data helping small businesses make right decisions.

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