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Washington Population by Age

The median age in Washington is 37.9, as per 2021 ACS 5-Year Estimates. Of the total population, 18.40% were under the age of 15, 19.82% aged 15 to 29, 46.32% aged 30 to 64, 13.74% aged 65 to 84, and 1.72% were 85 years of age and older.
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By Neilsberg Research
Updated Sep 17, 2023

Washington population age distribution

A complete breakdown of Washington'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 449,543 5.9%
5 to 9 years 473,106 6.21%
10 to 14 years 479,107 6.29%
15 to 19 years 458,844 6.02%
20 to 24 years 478,112 6.28%
25 to 29 years 572,530 7.52%
30 to 34 years 579,626 7.61%
35 to 39 years 546,638 7.18%
40 to 44 years 497,462 6.53%
45 to 49 years 472,295 6.2%
50 to 54 years 466,981 6.13%
55 to 59 years 480,723 6.31%
60 to 64 years 484,625 6.36%
65 to 69 years 408,527 5.36%
70 to 74 years 323,719 4.25%
75 to 79 years 192,068 2.52%
80 to 84 years 122,611 1.61%
85 years and over 130,847 1.72%
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TABLE OF CONTENTS

Washington population by age group

Key stats
2,338,712
Population under 25 years
2,196,256
Population aged 25-44
1,904,624
Population aged 45-64
1,177,772
Population aged 65+

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

The graph shows Washington'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
Washington population by age group. The largest age group was 30-34 years with a poulation of 579,626 (7.61% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Washington was for the group of age 30-34 years with a population of 579,626 (7.61%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Washington was the 80-84 years with a population of 122,611 (1.61%).

Washington population by age cohort

To better understand the age distribution of Washington'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 Washington'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.
Washington 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 4,759,132 (62.48% 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 1,680,460 22.06%
18 to 64 years 4,759,132 62.48%
85 years and over 1,177,772 15.46%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Washington's population under 18 was 22.06%, compared to the 22.51% nationwide.
  • Washington's working population (between 18 and 64) was 62.48%, compared to 61.45% nationwide.
  • Washington's elderly or the senior population (over 65 age) was 15.46% as compared to 16.04% nationwide.

Washington population pyramid

Population pyramid for Washington 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 Washington's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Washington, is 27.8.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Washington, is 23.4.
  • Total dependency ratio for Washington is 51.2.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Washington is 4.3.
The graph shows Washington'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.
Washington population pyramid i.e. Washington population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the Washington's male and female population across different age groups:

Age Group Population(Male) Population(Female) Total Population
Under 5 years 230,732 218,811 449,543
5 to 9 years 242,605 230,501 473,106
10 to 14 years 245,314 233,793 479,107
15 to 19 years 234,385 224,459 458,844
20 to 24 years 249,677 228,435 478,112
25 to 29 years 297,673 274,857 572,530
30 to 34 years 299,163 280,463 579,626
35 to 39 years 280,665 265,973 546,638
40 to 44 years 254,245 243,217 497,462
45 to 49 years 240,500 231,795 472,295
50 to 54 years 236,459 230,522 466,981
55 to 59 years 239,387 241,336 480,723
60 to 64 years 238,631 245,994 484,625
65 to 69 years 197,242 211,285 408,527
70 to 74 years 152,964 170,755 323,719
75 to 79 years 88,859 103,209 192,068
80 to 84 years 54,806 67,805 122,611
85 years and over 48,657 82,190 130,847
Exploring Washington's Diversity? Request Customized Data Now!

Things to know

What is the population of Washington under 18?

Washington's population under the age of 18 is 1,680,460, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 22.06% of the total resident population of Washington.

What is the aging population in Washington?

Washington's population aged 65 years and above was 1,177,772. As per the U.S. Census Bureau's American Community Survey, this population is 15.46% of the entire population.

References

Datasets

Explore datasets by year of publication.
2023
Washington Age Group Population Dataset: A complete breakdown of Washington age demographics from 0 to 85 years, distributed across 18 age groups
Last updated September 16, 2023
ACS
Free
Neilsberg
CSV, JSON
2017-2021
CC BY 4.0
About this dataset

Context

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

Key observations

The largest age group in Washington was for the group of age 30-34 years with a population of 579,626 (7.61%), according to the 2021 American Community Survey. At the same time, the smallest age group in Washington was the 80-84 years with a population of 122,611 (1.61%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Washington 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 Washington is shown in this column.
  • % of Total Population: This column displays the population of each age group as a proportion of Washington 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 Washington Population by Age. You can refer the same here

Washington Age Cohorts Dataset: Children, Working Adults, and Seniors in Washington - Population and Percentage Analysis
Last updated September 16, 2023
ACS
Free
Neilsberg
CSV, JSON
2017-2021
CC BY 4.0
About this dataset

Context

The dataset tabulates the Washington 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 Washington. 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.

Washington 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 Washington population analysis. Total expected values are 3 groups ( Children, Working Population and Senior Population).
  • Population: The population for the age cohort in Washington is shown in the following column.
  • Percent of Total Population: The population as a percent of total population of the Washington 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 Washington Population by Age. You can refer the same here

Washington Population Pyramid Dataset: Age Groups, Male and Female Population, and Total Population for Demographics Analysis
Last updated September 16, 2023
ACS
Free
Neilsberg
CSV, JSON
2017-2021
CC BY 4.0
About this dataset

Context

The dataset tabulates the data for the Washington population pyramid, which represents the Washington 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 Washington, is 27.8.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Washington, is 23.4.
  • Total dependency ratio for Washington is 51.2.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Washington is 4.3.

Washington 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 Washington population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the Washington for the selected age group is shown in the following column.
  • Population (Female): The female population in the Washington for the selected age group is shown in the following column.
  • Total Population: The total population of the Washington 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 Washington 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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Washington Demographics Washington Population

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Neilsberg Research
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