Monmouth County, NJ Population by Age

The median age in Monmouth County, NJ is 43.3, as per 2021 ACS 5-Year Estimates. Of the total population, 17.02% were under the age of 15, 17.95% aged 15 to 29, 47.28% aged 30 to 64, 15.42% aged 65 to 84, and 2.33% were 85 years of age and older.
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Updated Sep 17, 2023

Monmouth County, NJ population age distribution

A complete breakdown of Monmouth 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 31,540 4.91%
5 to 9 years 37,547 5.85%
10 to 14 years 40,223 6.26%
15 to 19 years 42,407 6.6%
20 to 24 years 37,679 5.87%
25 to 29 years 35,180 5.48%
30 to 34 years 33,708 5.25%
35 to 39 years 37,632 5.86%
40 to 44 years 36,762 5.72%
45 to 49 years 43,404 6.76%
50 to 54 years 49,834 7.76%
55 to 59 years 53,609 8.35%
60 to 64 years 48,661 7.58%
65 to 69 years 37,422 5.83%
70 to 74 years 29,976 4.67%
75 to 79 years 19,830 3.09%
80 to 84 years 11,778 1.83%
85 years and over 14,968 2.33%
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Monmouth County, NJ population by age group

Key stats
189,396
Population under 25 years
143,282
Population aged 25-44
195,508
Population aged 45-64
113,974
Population aged 65+

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

The graph shows Monmouth 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
Monmouth County, NJ population by age group. The largest age group was 55-59 years with a poulation of 53,609 (8.35% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Monmouth County, NJ was for the group of age 55-59 years with a population of 53,609 (8.35%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Monmouth County, NJ was the 80-84 years with a population of 11,778 (1.83%).

Monmouth County, NJ population by age cohort

To better understand the age distribution of Monmouth 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 Monmouth 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.
Monmouth 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 391,950 (61.04% 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 136,236 21.22%
18 to 64 years 391,950 61.04%
85 years and over 113,974 17.75%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Monmouth County's population under 18 was 21.22%, compared to the 22.51% nationwide.
  • Monmouth County's working population (between 18 and 64) was 61.04%, compared to 61.45% nationwide.
  • Monmouth County's elderly or the senior population (over 65 age) was 17.75% as compared to 16.04% nationwide.

Monmouth County, NJ population pyramid

Population pyramid for Monmouth 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 Monmouth County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Monmouth County, NJ, is 26.1.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Monmouth County, NJ, is 27.2.
  • Total dependency ratio for Monmouth County, NJ is 53.3.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Monmouth County, NJ is 3.7.
The graph shows Monmouth 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.
Monmouth County, NJ population pyramid i.e. Monmouth County population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

Age Group Population(Male) Population(Female) Total Population
Under 5 years 16,079 15,461 31,540
5 to 9 years 18,740 18,807 37,547
10 to 14 years 20,945 19,278 40,223
15 to 19 years 21,673 20,734 42,407
20 to 24 years 19,123 18,556 37,679
25 to 29 years 18,004 17,176 35,180
30 to 34 years 16,946 16,762 33,708
35 to 39 years 18,669 18,963 37,632
40 to 44 years 17,915 18,847 36,762
45 to 49 years 21,308 22,096 43,404
50 to 54 years 24,251 25,583 49,834
55 to 59 years 26,230 27,379 53,609
60 to 64 years 24,049 24,612 48,661
65 to 69 years 18,230 19,192 37,422
70 to 74 years 13,730 16,246 29,976
75 to 79 years 8,619 11,211 19,830
80 to 84 years 4,747 7,031 11,778
85 years and over 5,161 9,807 14,968
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Things to know

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

Monmouth County's population under the age of 18 is 136,236, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 21.22% of the total resident population of Monmouth County, NJ.

What is the aging population in Monmouth County, NJ?

Monmouth County's population aged 65 years and above was 113,974. As per the U.S. Census Bureau's American Community Survey, this population is 17.75% of the entire population.

References

Datasets

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

Key observations

The largest age group in Monmouth County, NJ was for the group of age 55-59 years with a population of 53,609 (8.35%), according to the 2021 American Community Survey. At the same time, the smallest age group in Monmouth County, NJ was the 80-84 years with a population of 11,778 (1.83%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

Monmouth County, NJ Age Cohorts Dataset: Children, Working Adults, and Seniors in Monmouth County - 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 Monmouth 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 Monmouth 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.

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

Monmouth County, NJ 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 Monmouth County, NJ population pyramid, which represents the Monmouth 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 Monmouth County, NJ, is 26.1.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Monmouth County, NJ, is 27.2.
  • Total dependency ratio for Monmouth County, NJ is 53.3.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Monmouth County, NJ is 3.7.

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

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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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