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California Population by Age

The median age in California is 37.3, as per 2018-2022 ACS 5 -Year Estimates. Of the total population, 18.40% were under the age of 15, 20.83% aged 15 to 29, 45.88% aged 30 to 64, 12.99% aged 65 to 84, and 1.91% were 85 years of age and older.
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By Neilsberg Research
Updated Jul 26, 2024

California population age distributions

A complete breakdown of California'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 2,258,308 5.74%
5 to 9 years 2,368,158 6.02%
10 to 14 years 2,613,036 6.64%
15 to 19 years 2,599,130 6.6%
20 to 24 years 2,674,774 6.8%
25 to 29 years 2,923,386 7.43%
30 to 34 years 2,960,897 7.52%
35 to 39 years 2,770,580 7.04%
40 to 44 years 2,580,396 6.56%
45 to 49 years 2,486,899 6.32%
50 to 54 years 2,490,317 6.33%
55 to 59 years 2,458,482 6.25%
60 to 64 years 2,306,441 5.86%
65 to 69 years 1,912,898 4.86%
70 to 74 years 1,514,562 3.85%
75 to 79 years 1,013,193 2.57%
80 to 84 years 673,456 1.71%
85 years and over 751,191 1.91%
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California population by age group

Key stats
12.51 million
Population under 25 years
11.24 million
Population aged 25-44
9.74 million
Population aged 45-64
5.87 million
Population aged 65+

Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022

FIGURE 1

California population by age group.

The largest age group is 30 to 34 years with a population of 2.96 million (7.52% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.
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The largest age group in California was for the group of age 30 to 34 years with a population of 2.96 million (7.52%), according to the 2018-2022 American Community Survey.

At the same time, the smallest age group in California was the 80 to 84 years with a population of 673,456 (1.71%).

California population by age cohort

To better understand the age distribution of California'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

California population by age cohort

The largest age group was 18 to 64 years with a population of 24.72 million (62.80% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.
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California population by age cohort

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

Age Group Population % of Total Population
Under 18 years 8,774,570 22.3%
18 to 64 years 24,716,234 62.8%
65 years and over 5,865,300 14.9%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • California 's population under 18 was 22.30%, compared to the 22.11% nationwide.
  • California's working population (between 18 and 64) was 62.80%, compared to 61.36% nationwide.
  • California's elderly or the senior population (over 65 age) was 14.90% as compared to 16.53% nationwide.

California population pyramid

Population pyramid for California 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 California's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for California, is 27.6.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for California, is 22.3.
  • Total dependency ratio for California is 49.9.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for California is 4.5.

FIGURE 3

California population pyramid

California population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.

Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.
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California population pyramid

Here's the California's male and female population across different age groups .

Age Group Population(Male) Population(Female) Total Population
Under 5 years 1,156,233 1,102,075 2,258,308
5 to 9 years 1,212,387 1,155,771 2,368,158
10 to 14 years 1,340,373 1,272,663 2,613,036
15 to 19 years 1,329,182 1,269,948 2,599,130
20 to 24 years 1,379,498 1,295,276 2,674,774
25 to 29 years 1,510,071 1,413,315 2,923,386
30 to 34 years 1,531,903 1,428,994 2,960,897
35 to 39 years 1,431,803 1,338,777 2,770,580
40 to 44 years 1,312,880 1,267,516 2,580,396
45 to 49 years 1,257,752 1,229,147 2,486,899
50 to 54 years 1,261,145 1,229,172 2,490,317
55 to 59 years 1,224,493 1,233,989 2,458,482
60 to 64 years 1,136,280 1,170,161 2,306,441
65 to 69 years 910,823 1,002,075 1,912,898
70 to 74 years 702,048 812,514 1,514,562
75 to 79 years 449,341 563,852 1,013,193
80 to 84 years 285,455 388,001 673,456
85 years and over 277,280 473,911 751,191
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Things to know

What is the population of California under 18?

California's population under the age of 18 is 8.77 million, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 22.30% of the total resident population of California.

What is the aging population in California?

California's population aged 65 years and above was 5.87 million. As per the U.S. Census Bureau's American Community Survey, this population is 14.90% of the entire population.

References

Datasets

Explore datasets by year of publication.
2024
California Age Group Population Dataset: A Complete Breakdown of California Age Demographics from 0 to 85 Years and Over, Distributed Across 18 Age Groups // 2024 Edition
Last updated July 24, 2024
ACS
Free
Neilsberg
CSV, JSON
2018-2022
CC BY 4.0
About this dataset

Context

The dataset tabulates the California 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 California. The dataset can be utilized to understand the population distribution of California by age. For example, using this dataset, we can identify the largest age group in California.

Key observations

The largest age group in California was for the group of age 30 to 34 years years with a population of 2.96 million (7.52%), according to the ACS 2018-2022 5-Year Estimates. At the same time, the smallest age group in California was the 80 to 84 years years with a population of 673,456 (1.71%). Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 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 California is shown in this column.
  • % of Total Population: This column displays the population of each age group as a proportion of California 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 California Population by Age. You can refer the same here

California Age Cohorts Dataset: Children, Working Adults, and Seniors in California - Population and Percentage Analysis // 2024 Edition
Last updated July 24, 2024
ACS
Free
Neilsberg
CSV, JSON
2018-2022
CC BY 4.0
About this dataset

Context

The dataset tabulates the California 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 California. 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 18 to 64 years with a poulation of 24.72 million (62.80% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 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 California population analysis. Total expected values are 3 groups ( Children, Working Population and Senior Population).
  • Population: The population for the age cohort in California is shown in the following column.
  • Percent of Total Population: The population as a percent of total population of the California 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 California Population by Age. You can refer the same here

California Population Pyramid Dataset: Age Groups, Male and Female Population, and Total Population for Demographics Analysis // 2024 Edition
Last updated July 24, 2024
ACS
Free
Neilsberg
CSV, JSON
2018-2022
CC BY 4.0
About this dataset

Context

The dataset tabulates the data for the California population pyramid, which represents the California population distribution across age and gender, using estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 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 California, is 27.6.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for California, is 22.3.
  • Total dependency ratio for California is 49.9.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for California is 4.5.
Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 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 California population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the California for the selected age group is shown in the following column.
  • Population (Female): The female population in the California for the selected age group is shown in the following column.
  • Total Population: The total population of the California 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 California Population by Age. You can refer the same here

If you're looking for datasets from another year, please feel free to contact us at research@neilsberg.com and we'll be happy to assist you further.

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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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Collection 5 Resources