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Will County, IL Population by Age

The median age in Will County, IL is 38.3, as per 2021 ACS 5-Year Estimates. Of the total population, 19.88% were under the age of 15, 19.86% aged 15 to 29, 47.08% aged 30 to 64, 11.81% aged 65 to 84, and 1.37% were 85 years of age and older.
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By Neilsberg Research
Updated Sep 17, 2023

Will County, IL population age distribution

A complete breakdown of Will 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 39,619 5.69%
5 to 9 years 43,881 6.3%
10 to 14 years 54,942 7.89%
15 to 19 years 52,912 7.6%
20 to 24 years 44,460 6.38%
25 to 29 years 40,912 5.87%
30 to 34 years 40,946 5.88%
35 to 39 years 46,529 6.68%
40 to 44 years 47,972 6.89%
45 to 49 years 51,609 7.41%
50 to 54 years 51,335 7.37%
55 to 59 years 48,037 6.9%
60 to 64 years 41,439 5.95%
65 to 69 years 33,061 4.75%
70 to 74 years 24,030 3.45%
75 to 79 years 15,824 2.27%
80 to 84 years 9,325 1.34%
85 years and over 9,570 1.37%
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TABLE OF CONTENTS

Will County, IL population by age group

Key stats
235,814
Population under 25 years
176,359
Population aged 25-44
192,420
Population aged 45-64
91,810
Population aged 65+

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

The graph shows Will 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
Will County, IL population by age group. The largest age group was 10-14 years with a poulation of 54,942 (7.89% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Will County, IL was for the group of age 10-14 years with a population of 54,942 (7.89%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Will County, IL was the 80-84 years with a population of 9,325 (1.34%).

Will County, IL population by age cohort

To better understand the age distribution of Will County, IL'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 Will 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.
Will County, IL 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 432,167 (62.06% 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 172,426 24.76%
18 to 64 years 432,167 62.06%
85 years and over 91,810 13.18%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Will County's population under 18 was 24.76%, compared to the 22.51% nationwide.
  • Will County's working population (between 18 and 64) was 62.06%, compared to 61.45% nationwide.
  • Will County's elderly or the senior population (over 65 age) was 13.18% as compared to 16.04% nationwide.

Will County, IL population pyramid

Population pyramid for Will County, IL 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 Will County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Will County, IL, is 29.7.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Will County, IL, is 19.7.
  • Total dependency ratio for Will County, IL is 49.4.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Will County, IL is 5.1.
The graph shows Will 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.
Will County, IL population pyramid i.e. Will County population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the Will County, IL's male and female population across different age groups:

Age Group Population(Male) Population(Female) Total Population
Under 5 years 20,068 19,551 39,619
5 to 9 years 22,386 21,495 43,881
10 to 14 years 28,090 26,852 54,942
15 to 19 years 27,431 25,481 52,912
20 to 24 years 22,958 21,502 44,460
25 to 29 years 20,836 20,076 40,912
30 to 34 years 20,695 20,251 40,946
35 to 39 years 22,877 23,652 46,529
40 to 44 years 24,067 23,905 47,972
45 to 49 years 25,786 25,823 51,609
50 to 54 years 25,839 25,496 51,335
55 to 59 years 23,759 24,278 48,037
60 to 64 years 21,051 20,388 41,439
65 to 69 years 16,091 16,970 33,061
70 to 74 years 11,096 12,934 24,030
75 to 79 years 6,982 8,842 15,824
80 to 84 years 4,003 5,322 9,325
85 years and over 3,354 6,216 9,570
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Things to know

What is the population of Will County, IL under 18?

Will County's population under the age of 18 is 172,426, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 24.76% of the total resident population of Will County, IL.

What is the aging population in Will County, IL?

Will County's population aged 65 years and above was 91,810. As per the U.S. Census Bureau's American Community Survey, this population is 13.18% of the entire population.

References

Datasets

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

Key observations

The largest age group in Will County, IL was for the group of age 10-14 years with a population of 54,942 (7.89%), according to the 2021 American Community Survey. At the same time, the smallest age group in Will County, IL was the 80-84 years with a population of 9,325 (1.34%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

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

Context

The dataset tabulates the Will 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 Will 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.

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

Will County, IL 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 Will County, IL population pyramid, which represents the Will 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 Will County, IL, is 29.7.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Will County, IL, is 19.7.
  • Total dependency ratio for Will County, IL is 49.4.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Will County, IL is 5.1.

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

Explore related topics

Will County, IL Demographics Will County, IL 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