New Haven County, CT Population by Age

The median age in New Haven County, CT is 40.4, as per 2021 ACS 5-Year Estimates. Of the total population, 16.49% were under the age of 15, 20.29% aged 15 to 29, 45.88% aged 30 to 64, 14.79% aged 65 to 84, and 2.55% were 85 years of age and older.
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Updated Sep 17, 2023

New Haven County, CT population age distribution

A complete breakdown of New Haven 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 44,144 5.1%
5 to 9 years 46,404 5.37%
10 to 14 years 52,030 6.02%
15 to 19 years 59,040 6.83%
20 to 24 years 58,621 6.78%
25 to 29 years 57,823 6.69%
30 to 34 years 57,022 6.59%
35 to 39 years 52,902 6.12%
40 to 44 years 51,349 5.94%
45 to 49 years 53,908 6.23%
50 to 54 years 59,734 6.91%
55 to 59 years 62,952 7.28%
60 to 64 years 58,923 6.81%
65 to 69 years 47,979 5.55%
70 to 74 years 38,490 4.45%
75 to 79 years 24,868 2.88%
80 to 84 years 16,520 1.91%
85 years and over 22,042 2.55%
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New Haven County, CT population by age group

Key stats
260,239
Population under 25 years
219,096
Population aged 25-44
235,517
Population aged 45-64
149,899
Population aged 65+

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

The graph shows New Haven 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
New Haven County, CT population by age group. The largest age group was 55-59 years with a poulation of 62,952 (7.28% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in New Haven County, CT was for the group of age 55-59 years with a population of 62,952 (7.28%), according to the 2021 American Community Survey.

At the same time, the smallest age group in New Haven County, CT was the 80-84 years with a population of 16,520 (1.91%).

New Haven County, CT population by age cohort

To better understand the age distribution of New Haven County, CT'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 New Haven 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.
New Haven County, CT 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 539,357 (62.37% 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 175,495 20.29%
18 to 64 years 539,357 62.37%
85 years and over 149,899 17.33%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • New Haven County's population under 18 was 20.29%, compared to the 22.51% nationwide.
  • New Haven County's working population (between 18 and 64) was 62.37%, compared to 61.45% nationwide.
  • New Haven County's elderly or the senior population (over 65 age) was 17.33% as compared to 16.04% nationwide.

New Haven County, CT population pyramid

Population pyramid for New Haven County, CT 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 New Haven County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for New Haven County, CT, is 24.9.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for New Haven County, CT, is 26.2.
  • Total dependency ratio for New Haven County, CT is 51.1.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for New Haven County, CT is 3.8.
The graph shows New Haven 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.
New Haven County, CT population pyramid i.e. New Haven County population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the New Haven County, CT's male and female population across different age groups:

Age Group Population(Male) Population(Female) Total Population
Under 5 years 22,612 21,532 44,144
5 to 9 years 23,193 23,211 46,404
10 to 14 years 27,199 24,831 52,030
15 to 19 years 29,715 29,325 59,040
20 to 24 years 29,399 29,222 58,621
25 to 29 years 29,008 28,815 57,823
30 to 34 years 27,990 29,032 57,022
35 to 39 years 25,497 27,405 52,902
40 to 44 years 25,222 26,127 51,349
45 to 49 years 26,022 27,886 53,908
50 to 54 years 29,005 30,729 59,734
55 to 59 years 30,402 32,550 62,952
60 to 64 years 28,554 30,369 58,923
65 to 69 years 22,434 25,545 47,979
70 to 74 years 17,547 20,943 38,490
75 to 79 years 11,160 13,708 24,868
80 to 84 years 6,654 9,866 16,520
85 years and over 7,297 14,745 22,042
Exploring New Haven County's Diversity? Request Customized Data Now!

Things to know

What is the population of New Haven County, CT under 18?

New Haven County's population under the age of 18 is 175,495, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 20.29% of the total resident population of New Haven County, CT.

What is the aging population in New Haven County, CT?

New Haven County's population aged 65 years and above was 149,899. As per the U.S. Census Bureau's American Community Survey, this population is 17.33% of the entire population.

References

Datasets

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

Key observations

The largest age group in New Haven County, CT was for the group of age 55-59 years with a population of 62,952 (7.28%), according to the 2021 American Community Survey. At the same time, the smallest age group in New Haven County, CT was the 80-84 years with a population of 16,520 (1.91%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

New Haven County, CT Age Cohorts Dataset: Children, Working Adults, and Seniors in New Haven 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 New Haven 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 New Haven 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.

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

New Haven County, CT 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 New Haven County, CT population pyramid, which represents the New Haven 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 New Haven County, CT, is 24.9.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for New Haven County, CT, is 26.2.
  • Total dependency ratio for New Haven County, CT is 51.1.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for New Haven County, CT is 3.8.

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