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Middlesex County, NJ Population by Age

The median age in Middlesex County, NJ is 39.1, as per 2018-2022 ACS 5 -Year Estimates. Of the total population, 17.72% were under the age of 15, 19.85% aged 15 to 29, 47% aged 30 to 64, 13.51% aged 65 to 84, and 1.93% were 85 years of age and older.
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By Neilsberg Research
Updated Jul 26, 2024

Middlesex County, NJ population age distributions

A complete breakdown of Middlesex 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 47,491 5.52%
5 to 9 years 51,127 5.94%
10 to 14 years 53,835 6.26%
15 to 19 years 59,815 6.95%
20 to 24 years 56,561 6.58%
25 to 29 years 54,360 6.32%
30 to 34 years 57,266 6.66%
35 to 39 years 59,806 6.95%
40 to 44 years 59,311 6.9%
45 to 49 years 57,517 6.69%
50 to 54 years 57,989 6.74%
55 to 59 years 59,222 6.89%
60 to 64 years 53,081 6.17%
65 to 69 years 43,589 5.07%
70 to 74 years 34,260 3.98%
75 to 79 years 23,107 2.69%
80 to 84 years 15,186 1.77%
85 years and over 16,624 1.93%
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Middlesex County, NJ population by age group

Key stats
268,829
Population under 25 years
230,743
Population aged 25-44
227,809
Population aged 45-64
132,766
Population aged 65+

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

FIGURE 1

Middlesex County, NJ population by age group.

The largest age group is 15 to 19 years with a population of 59,815 (6.95% 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 Middlesex County, NJ was for the group of age 15 to 19 years with a population of 59,815 (6.95%), according to the 2018-2022 American Community Survey.

At the same time, the smallest age group in Middlesex County, NJ was the 80 to 84 years with a population of 15,186 (1.77%).

Middlesex County, NJ population by age cohort

To better understand the age distribution of Middlesex 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

FIGURE 2

Middlesex County, NJ population by age cohort

The largest age group was 18 to 64 years with a population of 541,688 (62.98% of the total population).

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

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

Age Group Population % of Total Population
Under 18 years 185,693 21.59%
18 to 64 years 541,688 62.98%
65 years and over 132,766 15.44%
Exploring Middlesex County's Diversity? Request Customized Data Now!

Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Middlesex County 's population under 18 was 21.59%, compared to the 22.11% nationwide.
  • Middlesex County's working population (between 18 and 64) was 62.98%, compared to 61.36% nationwide.
  • Middlesex County's elderly or the senior population (over 65 age) was 15.44% as compared to 16.53% nationwide.

Middlesex County, NJ population pyramid

Population pyramid for Middlesex 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 Middlesex County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Middlesex County, NJ, is 26.5.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Middlesex County, NJ, is 23.1.
  • Total dependency ratio for Middlesex County, NJ is 49.6.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Middlesex County, NJ is 4.3.

FIGURE 3

Middlesex County, NJ population pyramid

Middlesex County 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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Middlesex County, NJ population pyramid

Here's the Middlesex County, NJ's male and female population across different age groups .

Age Group Population(Male) Population(Female) Total Population
Under 5 years 24,383 23,108 47,491
5 to 9 years 26,226 24,901 51,127
10 to 14 years 27,412 26,423 53,835
15 to 19 years 30,651 29,164 59,815
20 to 24 years 28,858 27,703 56,561
25 to 29 years 27,462 26,898 54,360
30 to 34 years 29,168 28,098 57,266
35 to 39 years 29,835 29,971 59,806
40 to 44 years 31,060 28,251 59,311
45 to 49 years 29,329 28,188 57,517
50 to 54 years 29,243 28,746 57,989
55 to 59 years 29,326 29,896 59,222
60 to 64 years 26,085 26,996 53,081
65 to 69 years 20,661 22,928 43,589
70 to 74 years 15,947 18,313 34,260
75 to 79 years 10,086 13,021 23,107
80 to 84 years 6,629 8,557 15,186
85 years and over 5,346 11,278 16,624
Exploring Middlesex County's Diversity? Request Customized Data Now!

Things to know

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

Middlesex County's population under the age of 18 is 185,693, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 21.59% of the total resident population of Middlesex County, NJ.

What is the aging population in Middlesex County, NJ?

Middlesex County's population aged 65 years and above was 132,766. As per the U.S. Census Bureau's American Community Survey, this population is 15.44% of the entire population.

References

Datasets

Explore datasets by year of publication.
2024
Middlesex County, NJ Age Group Population Dataset: A Complete Breakdown of Middlesex County 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 Middlesex 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 Middlesex County. The dataset can be utilized to understand the population distribution of Middlesex County by age. For example, using this dataset, we can identify the largest age group in Middlesex County.

Key observations

The largest age group in Middlesex County, NJ was for the group of age 15 to 19 years years with a population of 59,815 (6.95%), according to the ACS 2018-2022 5-Year Estimates. At the same time, the smallest age group in Middlesex County, NJ was the 80 to 84 years years with a population of 15,186 (1.77%). 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 Middlesex County is shown in this column.
  • % of Total Population: This column displays the population of each age group as a proportion of Middlesex 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 Middlesex County Population by Age. You can refer the same here

Middlesex County, NJ Age Cohorts Dataset: Children, Working Adults, and Seniors in Middlesex County - 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 Middlesex 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 Middlesex 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 18 to 64 years with a poulation of 541,688 (62.98% 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 Middlesex County population analysis. Total expected values are 3 groups ( Children, Working Population and Senior Population).
  • Population: The population for the age cohort in Middlesex County is shown in the following column.
  • Percent of Total Population: The population as a percent of total population of the Middlesex 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 Middlesex County Population by Age. You can refer the same here

Middlesex County, NJ 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 Middlesex County, NJ population pyramid, which represents the Middlesex County 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 Middlesex County, NJ, is 26.5.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Middlesex County, NJ, is 23.1.
  • Total dependency ratio for Middlesex County, NJ is 49.6.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Middlesex County, NJ is 4.3.
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 Middlesex County population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the Middlesex County for the selected age group is shown in the following column.
  • Population (Female): The female population in the Middlesex County for the selected age group is shown in the following column.
  • Total Population: The total population of the Middlesex 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 Middlesex County 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.

Explore related topics

Middlesex County, NJ Demographics Middlesex County, NJ Population

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