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Somerset County, NJ Population by Age

The median age in Somerset County, NJ is 41.8, as per 2021 ACS 5-Year Estimates. Of the total population, 17.49% were under the age of 15, 17.89% aged 15 to 29, 48.79% aged 30 to 64, 13.62% aged 65 to 84, and 2.21% were 85 years of age and older.
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By Neilsberg Research
Updated Sep 17, 2023

Somerset County, NJ population age distribution

A complete breakdown of Somerset 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 17,280 5.02%
5 to 9 years 19,250 5.6%
10 to 14 years 23,629 6.87%
15 to 19 years 23,010 6.69%
20 to 24 years 19,906 5.79%
25 to 29 years 18,632 5.42%
30 to 34 years 19,153 5.57%
35 to 39 years 22,672 6.59%
40 to 44 years 21,955 6.38%
45 to 49 years 25,000 7.27%
50 to 54 years 27,434 7.98%
55 to 59 years 28,165 8.19%
60 to 64 years 23,434 6.81%
65 to 69 years 18,193 5.29%
70 to 74 years 12,807 3.72%
75 to 79 years 8,739 2.54%
80 to 84 years 7,104 2.07%
85 years and over 7,587 2.21%
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TABLE OF CONTENTS

Somerset County, NJ population by age group

Key stats
103,075
Population under 25 years
82,412
Population aged 25-44
104,033
Population aged 45-64
54,430
Population aged 65+

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

The graph shows Somerset 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
Somerset County, NJ population by age group. The largest age group was 55-59 years with a poulation of 28,165 (8.19% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Somerset County, NJ was for the group of age 55-59 years with a population of 28,165 (8.19%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Somerset County, NJ was the 80-84 years with a population of 7,104 (2.07%).

Somerset County, NJ population by age cohort

To better understand the age distribution of Somerset County, NJ'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 Somerset 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.
Somerset County, NJ 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 214,377 (62.33% 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 75,143 21.85%
18 to 64 years 214,377 62.33%
85 years and over 54,430 15.82%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Somerset County's population under 18 was 21.85%, compared to the 22.51% nationwide.
  • Somerset County's working population (between 18 and 64) was 62.33%, compared to 61.45% nationwide.
  • Somerset County's elderly or the senior population (over 65 age) was 15.82% as compared to 16.04% nationwide.

Somerset County, NJ population pyramid

Population pyramid for Somerset County, NJ 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 Somerset County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Somerset County, NJ, is 26.2.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Somerset County, NJ, is 23.7.
  • Total dependency ratio for Somerset County, NJ is 50.0.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Somerset County, NJ is 4.2.
The graph shows Somerset 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.
Somerset County, NJ population pyramid i.e. Somerset County population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the Somerset County, NJ's male and female population across different age groups:

Age Group Population(Male) Population(Female) Total Population
Under 5 years 8,871 8,409 17,280
5 to 9 years 9,874 9,376 19,250
10 to 14 years 12,309 11,320 23,629
15 to 19 years 11,850 11,160 23,010
20 to 24 years 10,001 9,905 19,906
25 to 29 years 9,516 9,116 18,632
30 to 34 years 9,587 9,566 19,153
35 to 39 years 10,968 11,704 22,672
40 to 44 years 10,944 11,011 21,955
45 to 49 years 12,406 12,594 25,000
50 to 54 years 13,510 13,924 27,434
55 to 59 years 13,874 14,291 28,165
60 to 64 years 11,753 11,681 23,434
65 to 69 years 8,382 9,811 18,193
70 to 74 years 6,284 6,523 12,807
75 to 79 years 3,593 5,146 8,739
80 to 84 years 2,867 4,237 7,104
85 years and over 2,688 4,899 7,587
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Things to know

What is the population of Somerset County, NJ under 18?

Somerset County's population under the age of 18 is 75,143, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 21.85% of the total resident population of Somerset County, NJ.

What is the aging population in Somerset County, NJ?

Somerset County's population aged 65 years and above was 54,430. As per the U.S. Census Bureau's American Community Survey, this population is 15.82% of the entire population.

References

Datasets

Somerset County, NJ Age Group Population Dataset: A complete breakdown of Somerset 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 Somerset 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 Somerset County. The dataset can be utilized to understand the population distribution of Somerset County by age. For example, using this dataset, we can identify the largest age group in Somerset County.

Key observations

The largest age group in Somerset County, NJ was for the group of age 55-59 years with a population of 28,165 (8.19%), according to the 2021 American Community Survey. At the same time, the smallest age group in Somerset County, NJ was the 80-84 years with a population of 7,104 (2.07%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

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

Context

The dataset tabulates the Somerset 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 Somerset 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.

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

Somerset County, NJ 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 Somerset County, NJ population pyramid, which represents the Somerset 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 Somerset County, NJ, is 26.2.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Somerset County, NJ, is 23.7.
  • Total dependency ratio for Somerset County, NJ is 50.0.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Somerset County, NJ is 4.2.

Somerset 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 Somerset County population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the Somerset County for the selected age group is shown in the following column.
  • Population (Female): The female population in the Somerset County for the selected age group is shown in the following column.
  • Total Population: The total population of the Somerset 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 Somerset County Population by Age. You can refer the same here

Explore related topics

Somerset County, NJ Demographics Somerset County, NJ Population

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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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Collection 5 Resources