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Delaware Population by Age

The median age in Delaware is 41.1, as per 2021 ACS 5-Year Estimates. Of the total population, 17.47% were under the age of 15, 18.73% aged 15 to 29, 44.82% aged 30 to 64, 17.08% aged 65 to 84, and 1.91% were 85 years of age and older.
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By Neilsberg Research
Updated Sep 17, 2023

Delaware population age distribution

A complete breakdown of Delaware'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 54,234 5.52%
5 to 9 years 56,481 5.75%
10 to 14 years 60,792 6.19%
15 to 19 years 61,884 6.3%
20 to 24 years 57,883 5.9%
25 to 29 years 64,150 6.53%
30 to 34 years 63,728 6.49%
35 to 39 years 59,429 6.05%
40 to 44 years 56,344 5.74%
45 to 49 years 57,443 5.85%
50 to 54 years 63,792 6.5%
55 to 59 years 69,719 7.1%
60 to 64 years 69,638 7.09%
65 to 69 years 64,491 6.57%
70 to 74 years 49,465 5.04%
75 to 79 years 33,567 3.42%
80 to 84 years 20,141 2.05%
85 years and over 18,711 1.91%
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TABLE OF CONTENTS

Delaware population by age group

Key stats
291,274
Population under 25 years
243,651
Population aged 25-44
260,592
Population aged 45-64
186,375
Population aged 65+

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

The graph shows Delaware'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
Delaware population by age group. The largest age group was 55-59 years with a poulation of 69,719 (7.10% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Delaware was for the group of age 55-59 years with a population of 69,719 (7.10%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Delaware was the 85+ years with a population of 18,711 (1.91%).

Delaware population by age cohort

To better understand the age distribution of Delaware'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 Delaware'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.
Delaware 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 587,872 (59.87% 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 207,645 21.15%
18 to 64 years 587,872 59.87%
85 years and over 186,375 18.98%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Delaware's population under 18 was 21.15%, compared to the 22.51% nationwide.
  • Delaware's working population (between 18 and 64) was 59.87%, compared to 61.45% nationwide.
  • Delaware's elderly or the senior population (over 65 age) was 18.98% as compared to 16.04% nationwide.

Delaware population pyramid

Population pyramid for Delaware 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 Delaware's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Delaware, is 27.5.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Delaware, is 29.9.
  • Total dependency ratio for Delaware is 57.4.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Delaware is 3.3.
The graph shows Delaware'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.
Delaware population pyramid i.e. Delaware population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the Delaware's male and female population across different age groups:

Age Group Population(Male) Population(Female) Total Population
Under 5 years 27,567 26,667 54,234
5 to 9 years 28,646 27,835 56,481
10 to 14 years 30,950 29,842 60,792
15 to 19 years 31,028 30,856 61,884
20 to 24 years 29,500 28,383 57,883
25 to 29 years 32,141 32,009 64,150
30 to 34 years 31,668 32,060 63,728
35 to 39 years 30,222 29,207 59,429
40 to 44 years 26,794 29,550 56,344
45 to 49 years 27,899 29,544 57,443
50 to 54 years 30,730 33,062 63,792
55 to 59 years 34,190 35,529 69,719
60 to 64 years 31,878 37,760 69,638
65 to 69 years 29,814 34,677 64,491
70 to 74 years 23,098 26,367 49,465
75 to 79 years 15,122 18,445 33,567
80 to 84 years 8,791 11,350 20,141
85 years and over 7,181 11,530 18,711
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Things to know

What is the population of Delaware under 18?

Delaware's population under the age of 18 is 207,645, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 21.15% of the total resident population of Delaware.

What is the aging population in Delaware?

Delaware's population aged 65 years and above was 186,375. As per the U.S. Census Bureau's American Community Survey, this population is 18.98% of the entire population.

References

Datasets

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

Key observations

The largest age group in Delaware was for the group of age 55-59 years with a population of 69,719 (7.10%), according to the 2021 American Community Survey. At the same time, the smallest age group in Delaware was the 85+ years with a population of 18,711 (1.91%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

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

Context

The dataset tabulates the Delaware 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 Delaware. 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.

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

Delaware 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 Delaware population pyramid, which represents the Delaware 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 Delaware, is 27.5.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Delaware, is 29.9.
  • Total dependency ratio for Delaware is 57.4.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Delaware is 3.3.

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

Explore related topics

Delaware Demographics Delaware 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