Cambridge, MA Population by Age

The median age in Cambridge, MA is 30.5, as per 2021 ACS 5-Year Estimates. Of the total population, 10.51% were under the age of 15, 38.01% aged 15 to 29, 40.18% aged 30 to 64, 9.78% aged 65 to 84, and 1.53% were 85 years of age and older.
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Updated Sep 17, 2023

Cambridge, MA population age distribution

A complete breakdown of Cambridge'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 4,996 4.27%
5 to 9 years 4,054 3.47%
10 to 14 years 3,231 2.76%
15 to 19 years 9,549 8.17%
20 to 24 years 16,118 13.79%
25 to 29 years 18,760 16.05%
30 to 34 years 13,707 11.73%
35 to 39 years 9,737 8.33%
40 to 44 years 5,840 5%
45 to 49 years 4,714 4.03%
50 to 54 years 4,317 3.69%
55 to 59 years 4,188 3.58%
60 to 64 years 4,463 3.82%
65 to 69 years 4,340 3.71%
70 to 74 years 3,580 3.06%
75 to 79 years 2,127 1.82%
80 to 84 years 1,380 1.18%
85 years and over 1,791 1.53%
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Cambridge, MA population by age group

Key stats
37,948
Population under 25 years
48,044
Population aged 25-44
17,682
Population aged 45-64
13,218
Population aged 65+

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

The graph shows Cambridge'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
Cambridge, MA population by age group. The largest age group was 25-29 years with a poulation of 18,760 (16.05% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Cambridge, MA was for the group of age 25-29 years with a population of 18,760 (16.05%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Cambridge, MA was the 80-84 years with a population of 1,380 (1.18%).

Cambridge, MA population by age cohort

To better understand the age distribution of Cambridge, MA'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 Cambridge'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.
Cambridge, MA 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 89,162 (76.28% 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 14,512 12.41%
18 to 64 years 89,162 76.28%
85 years and over 13,218 11.31%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Cambridge's population under 18 was 12.41%, compared to the 22.51% nationwide.
  • Cambridge's working population (between 18 and 64) was 76.28%, compared to 61.45% nationwide.
  • Cambridge's elderly or the senior population (over 65 age) was 11.31% as compared to 16.04% nationwide.

Cambridge, MA population pyramid

Population pyramid for Cambridge, MA 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 Cambridge's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Cambridge, MA, is 13.4.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Cambridge, MA, is 14.5.
  • Total dependency ratio for Cambridge, MA is 27.9.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Cambridge, MA is 6.9.
The graph shows Cambridge'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.
Cambridge, MA population pyramid i.e. Cambridge population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the Cambridge, MA's male and female population across different age groups:

Age Group Population(Male) Population(Female) Total Population
Under 5 years 2,703 2,293 4,996
5 to 9 years 2,148 1,906 4,054
10 to 14 years 1,778 1,453 3,231
15 to 19 years 4,732 4,817 9,549
20 to 24 years 7,658 8,460 16,118
25 to 29 years 9,658 9,102 18,760
30 to 34 years 7,455 6,252 13,707
35 to 39 years 4,883 4,854 9,737
40 to 44 years 3,035 2,805 5,840
45 to 49 years 2,363 2,351 4,714
50 to 54 years 2,191 2,126 4,317
55 to 59 years 2,069 2,119 4,188
60 to 64 years 2,145 2,318 4,463
65 to 69 years 1,933 2,407 4,340
70 to 74 years 1,577 2,003 3,580
75 to 79 years 855 1,272 2,127
80 to 84 years 558 822 1,380
85 years and over 665 1,126 1,791
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Things to know

What is the population of Cambridge, MA under 18?

Cambridge's population under the age of 18 is 14,512, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 12.41% of the total resident population of Cambridge, MA.

What is the aging population in Cambridge, MA?

Cambridge's population aged 65 years and above was 13,218. As per the U.S. Census Bureau's American Community Survey, this population is 11.31% of the entire population.

References

Datasets

Explore datasets by year of publication.
2023
Cambridge, MA Age Group Population Dataset: A complete breakdown of Cambridge 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 Cambridge 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 Cambridge. The dataset can be utilized to understand the population distribution of Cambridge by age. For example, using this dataset, we can identify the largest age group in Cambridge.

Key observations

The largest age group in Cambridge, MA was for the group of age 25-29 years with a population of 18,760 (16.05%), according to the 2021 American Community Survey. At the same time, the smallest age group in Cambridge, MA was the 80-84 years with a population of 1,380 (1.18%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

Cambridge, MA Age Cohorts Dataset: Children, Working Adults, and Seniors in Cambridge - 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 Cambridge 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 Cambridge. 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.

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

Cambridge, MA 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 Cambridge, MA population pyramid, which represents the Cambridge 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 Cambridge, MA, is 13.4.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Cambridge, MA, is 14.5.
  • Total dependency ratio for Cambridge, MA is 27.9.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Cambridge, MA is 6.9.

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

About the author

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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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