Iowa Population by Age

The median age in Iowa is 38.3, as per 2021 ACS 5-Year Estimates. Of the total population, 19.33% were under the age of 15, 20.28% aged 15 to 29, 43.38% aged 30 to 64, 14.67% aged 65 to 84, and 2.33% were 85 years of age and older.
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Updated Sep 17, 2023

Iowa population age distribution

A complete breakdown of Iowa'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 194,570 6.12%
5 to 9 years 204,850 6.44%
10 to 14 years 215,162 6.77%
15 to 19 years 219,617 6.91%
20 to 24 years 225,007 7.08%
25 to 29 years 200,150 6.3%
30 to 34 years 194,581 6.12%
35 to 39 years 207,094 6.51%
40 to 44 years 185,568 5.84%
45 to 49 years 181,194 5.7%
50 to 54 years 190,637 6%
55 to 59 years 210,808 6.63%
60 to 64 years 209,310 6.58%
65 to 69 years 178,530 5.62%
70 to 74 years 134,688 4.24%
75 to 79 years 88,789 2.79%
80 to 84 years 64,400 2.03%
85 years and over 74,135 2.33%
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Iowa population by age group

Key stats
1,059,206
Population under 25 years
787,393
Population aged 25-44
791,949
Population aged 45-64
540,542
Population aged 65+

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

The graph shows Iowa'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
Iowa population by age group. The largest age group was 20-24 years with a poulation of 225,007 (7.08% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Iowa was for the group of age 20-24 years with a population of 225,007 (7.08%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Iowa was the 80-84 years with a population of 64,400 (2.03%).

Iowa population by age cohort

To better understand the age distribution of Iowa'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 Iowa'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.
Iowa 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 1,896,373 (59.65% 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 742,175 23.35%
18 to 64 years 1,896,373 59.65%
85 years and over 540,542 17%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Iowa's population under 18 was 23.35%, compared to the 22.51% nationwide.
  • Iowa's working population (between 18 and 64) was 59.65%, compared to 61.45% nationwide.
  • Iowa's elderly or the senior population (over 65 age) was 17.00% as compared to 16.04% nationwide.

Iowa population pyramid

Population pyramid for Iowa 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 Iowa's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Iowa, is 30.4.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Iowa, is 26.7.
  • Total dependency ratio for Iowa is 57.1.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Iowa is 3.7.
The graph shows Iowa'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.
Iowa population pyramid i.e. Iowa population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

Age Group Population(Male) Population(Female) Total Population
Under 5 years 99,307 95,263 194,570
5 to 9 years 105,743 99,107 204,850
10 to 14 years 108,860 106,302 215,162
15 to 19 years 112,674 106,943 219,617
20 to 24 years 116,258 108,749 225,007
25 to 29 years 102,405 97,745 200,150
30 to 34 years 98,991 95,590 194,581
35 to 39 years 106,752 100,342 207,094
40 to 44 years 95,134 90,434 185,568
45 to 49 years 91,900 89,294 181,194
50 to 54 years 96,739 93,898 190,637
55 to 59 years 104,311 106,497 210,808
60 to 64 years 105,469 103,841 209,310
65 to 69 years 87,765 90,765 178,530
70 to 74 years 64,693 69,995 134,688
75 to 79 years 39,404 49,385 88,789
80 to 84 years 27,002 37,398 64,400
85 years and over 26,594 47,541 74,135
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Things to know

What is the population of Iowa under 18?

Iowa's population under the age of 18 is 742,175, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 23.35% of the total resident population of Iowa.

What is the aging population in Iowa?

Iowa's population aged 65 years and above was 540,542. As per the U.S. Census Bureau's American Community Survey, this population is 17.00% of the entire population.

References

Datasets

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

Key observations

The largest age group in Iowa was for the group of age 20-24 years with a population of 225,007 (7.08%), according to the 2021 American Community Survey. At the same time, the smallest age group in Iowa was the 80-84 years with a population of 64,400 (2.03%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

Iowa Age Cohorts Dataset: Children, Working Adults, and Seniors in Iowa - 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 Iowa 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 Iowa. 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.

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

Iowa 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 Iowa population pyramid, which represents the Iowa 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 Iowa, is 30.4.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Iowa, is 26.7.
  • Total dependency ratio for Iowa is 57.1.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Iowa is 3.7.

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

Iowa Demographics Iowa Population

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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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