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Massachusetts Population by Age

The median age in Massachusetts is 40.0, as per 2019-2023 ACS 5 -Year Estimates. Of the total population, 15.97% were under the age of 15, 20.28% aged 15 to 29, 46.29% aged 30 to 64, 15.26% aged 65 to 84, and 2.21% were 85 years of age and older.
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By Neilsberg Research
Updated Feb 22, 2025

Massachusetts population age distributions

A complete breakdown of Massachusetts'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 350,335 5.01%
5 to 9 years 366,340 5.24%
10 to 14 years 399,918 5.72%
15 to 19 years 456,586 6.53%
20 to 24 years 473,586 6.77%
25 to 29 years 488,135 6.98%
30 to 34 years 496,017 7.09%
35 to 39 years 464,816 6.65%
40 to 44 years 433,760 6.2%
45 to 49 years 417,119 5.97%
50 to 54 years 462,056 6.61%
55 to 59 years 487,752 6.98%
60 to 64 years 474,626 6.79%
65 to 69 years 399,166 5.71%
70 to 74 years 322,272 4.61%
75 to 79 years 211,022 3.02%
80 to 84 years 134,157 1.92%
85 years and over 154,732 2.21%
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Massachusetts population by age group

Key stats
2.05 million
Population under 25 years
1.88 million
Population aged 25-44
1.84 million
Population aged 45-64
1.22 million
Population aged 65+

Sources: U.S. Census Bureau, American Community Survey (ACS) 2019-2023

FIGURE 1

Massachusetts population by age group.

The largest age group is 30 to 34 years with a population of 496,017 (7.09% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.
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The largest age group in Massachusetts was for the group of age 30 to 34 years with a population of 496,017 (7.09%), according to the 2019-2023 American Community Survey.

At the same time, the smallest age group in Massachusetts was the 80 to 84 years with a population of 134,157 (1.92%).

Massachusetts population by age cohort

To better understand the age distribution of Massachusetts'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

Massachusetts population by age cohort

The largest age group was 18 to 64 years with a population of 4.4 million (62.96% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.
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Massachusetts population by age cohort

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

Age Group Population % of Total Population
Under 18 years 1,368,408 19.57%
18 to 64 years 4,402,638 62.96%
65 years and over 1,221,349 17.47%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Massachusetts 's population under 18 was 19.57%, compared to the 22.16% nationwide.
  • Massachusetts's working population (between 18 and 64) was 62.96%, compared to 61% nationwide.
  • Massachusetts's elderly or the senior population (over 65 age) was 17.47% as compared to 16.84% nationwide.

Massachusetts population pyramid

Population pyramid for Massachusetts 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 Massachusetts's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Massachusetts, is 24.0.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Massachusetts, is 26.2.
  • Total dependency ratio for Massachusetts is 50.2.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Massachusetts is 3.8.

FIGURE 3

Massachusetts population pyramid

Massachusetts 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) 2019-2023 5-Year Estimates.
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Massachusetts population pyramid

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

Age Group Population(Male) Population(Female) Total Population
Under 5 years 179,662 170,673 350,335
5 to 9 years 188,367 177,973 366,340
10 to 14 years 204,240 195,678 399,918
15 to 19 years 229,730 226,856 456,586
20 to 24 years 235,068 238,518 473,586
25 to 29 years 245,477 242,658 488,135
30 to 34 years 248,496 247,521 496,017
35 to 39 years 230,755 234,061 464,816
40 to 44 years 214,775 218,985 433,760
45 to 49 years 204,806 212,313 417,119
50 to 54 years 226,103 235,953 462,056
55 to 59 years 239,943 247,809 487,752
60 to 64 years 229,230 245,396 474,626
65 to 69 years 190,685 208,481 399,166
70 to 74 years 146,551 175,721 322,272
75 to 79 years 93,265 117,757 211,022
80 to 84 years 56,501 77,656 134,157
85 years and over 53,111 101,621 154,732
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Things to know

What is the population of Massachusetts under 18?

Massachusetts's population under the age of 18 is 1.37 million, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 19.57% of the total resident population of Massachusetts.

What is the aging population in Massachusetts?

Massachusetts's population aged 65 years and above was 1.22 million. As per the U.S. Census Bureau's American Community Survey, this population is 17.47% of the entire population.

References

Datasets

Explore datasets by year of publication.
2025
Massachusetts Age Group Population Dataset: A Complete Breakdown of Massachusetts Age Demographics from 0 to 85 Years and Over, Distributed Across 18 Age Groups // 2025 Edition
Last updated February 22, 2025
ACS
Free
Neilsberg
CSV, JSON
2019-2023
CC BY 4.0
About this dataset

Context

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

Key observations

The largest age group in Massachusetts was for the group of age 30 to 34 years years with a population of 496,017 (7.09%), according to the ACS 2019-2023 5-Year Estimates. At the same time, the smallest age group in Massachusetts was the 80 to 84 years years with a population of 134,157 (1.92%). Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Massachusetts is shown in this column.
  • % of Total Population: This column displays the population of each age group as a proportion of Massachusetts 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 Massachusetts Population by Age. You can refer the same here

Massachusetts Age Cohorts Dataset: Children, Working Adults, and Seniors in Massachusetts - Population and Percentage Analysis // 2025 Edition
Last updated February 22, 2025
ACS
Free
Neilsberg
CSV, JSON
2019-2023
CC BY 4.0
About this dataset

Context

The dataset tabulates the Massachusetts 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 Massachusetts. 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 4.4 million (62.96% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Massachusetts population analysis. Total expected values are 3 groups ( Children, Working Population and Senior Population).
  • Population: The population for the age cohort in Massachusetts is shown in the following column.
  • Percent of Total Population: The population as a percent of total population of the Massachusetts 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 Massachusetts Population by Age. You can refer the same here

Massachusetts Population Pyramid Dataset: Age Groups, Male and Female Population, and Total Population for Demographics Analysis // 2025 Edition
Last updated February 22, 2025
ACS
Free
Neilsberg
CSV, JSON
2019-2023
CC BY 4.0
About this dataset

Context

The dataset tabulates the data for the Massachusetts population pyramid, which represents the Massachusetts population distribution across age and gender, using estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Massachusetts, is 24.0.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Massachusetts, is 26.2.
  • Total dependency ratio for Massachusetts is 50.2.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Massachusetts is 3.8.
Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Massachusetts population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the Massachusetts for the selected age group is shown in the following column.
  • Population (Female): The female population in the Massachusetts for the selected age group is shown in the following column.
  • Total Population: The total population of the Massachusetts 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 Massachusetts 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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Massachusetts Demographics Massachusetts Population

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Collection 5 Resources