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Fort Madison, IA Population by Age

The median age in Fort Madison, IA is 43.9, as per 2019-2023 ACS 5 -Year Estimates. Of the total population, 13.84% were under the age of 15, 19.07% aged 15 to 29, 45.84% aged 30 to 64, 17.99% aged 65 to 84, and 3.26% were 85 years of age and older.
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By Neilsberg Research
Updated Feb 22, 2025

Fort Madison, IA population age distributions

A complete breakdown of Fort Madison'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 487 4.76%
5 to 9 years 515 5.04%
10 to 14 years 413 4.04%
15 to 19 years 550 5.38%
20 to 24 years 736 7.2%
25 to 29 years 663 6.49%
30 to 34 years 570 5.58%
35 to 39 years 620 6.07%
40 to 44 years 823 8.05%
45 to 49 years 686 6.71%
50 to 54 years 522 5.11%
55 to 59 years 718 7.02%
60 to 64 years 746 7.3%
65 to 69 years 772 7.55%
70 to 74 years 568 5.56%
75 to 79 years 275 2.69%
80 to 84 years 224 2.19%
85 years and over 333 3.26%
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Fort Madison, IA population by age group

Key stats
2,701
Population under 25 years
2,676
Population aged 25-44
2,672
Population aged 45-64
2,172
Population aged 65+

Sources: U.S. Census Bureau, American Community Survey (ACS) 2019-2023

FIGURE 1

Fort Madison, IA population by age group.

The largest age group is 40 to 44 years with a population of 823 (8.05% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.
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The largest age group in Fort Madison, IA was for the group of age 40 to 44 years with a population of 823 (8.05%), according to the 2019-2023 American Community Survey.

At the same time, the smallest age group in Fort Madison, IA was the 80 to 84 years with a population of 224 (2.19%).

Fort Madison, IA population by age cohort

To better understand the age distribution of Fort Madison, IA'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

FIGURE 2

Fort Madison, IA population by age cohort

The largest age group was 18 to 64 years with a population of 6,210 (60.76% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.
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Fort Madison, IA population by age cohort

Here's the population for each of the three cohorts.

Age Group Population % of Total Population
Under 18 years 1,839 17.99%
18 to 64 years 6,210 60.76%
65 years and over 2,172 21.25%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Fort Madison 's population under 18 was 17.99%, compared to the 22.16% nationwide.
  • Fort Madison's working population (between 18 and 64) was 60.76%, compared to 61% nationwide.
  • Fort Madison's elderly or the senior population (over 65 age) was 21.25% as compared to 16.84% nationwide.

Fort Madison, IA population pyramid

Population pyramid for Fort Madison, IA 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 Fort Madison's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Fort Madison, IA, is 21.3.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Fort Madison, IA, is 32.7.
  • Total dependency ratio for Fort Madison, IA is 54.1.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Fort Madison, IA is 3.1.

FIGURE 3

Fort Madison, IA population pyramid

Fort Madison population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.

Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.
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Fort Madison, IA population pyramid

Here's the Fort Madison, IA's male and female population across different age groups .

Age Group Population(Male) Population(Female) Total Population
Under 5 years 229 258 487
5 to 9 years 314 201 515
10 to 14 years 246 167 413
15 to 19 years 210 340 550
20 to 24 years 410 326 736
25 to 29 years 426 237 663
30 to 34 years 278 292 570
35 to 39 years 374 246 620
40 to 44 years 472 351 823
45 to 49 years 452 234 686
50 to 54 years 216 306 522
55 to 59 years 335 383 718
60 to 64 years 375 371 746
65 to 69 years 382 390 772
70 to 74 years 279 289 568
75 to 79 years 145 130 275
80 to 84 years 95 129 224
85 years and over 68 265 333
Exploring Fort Madison's Diversity? Request Customized Data Now!

Things to know

What is the population of Fort Madison, IA under 18?

Fort Madison's population under the age of 18 is 1,839, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 17.99% of the total resident population of Fort Madison, IA.

What is the aging population in Fort Madison, IA?

Fort Madison's population aged 65 years and above was 2,172. As per the U.S. Census Bureau's American Community Survey, this population is 21.25% of the entire population.

References

Datasets

Explore datasets by year of publication.
2025
Fort Madison, IA Age Group Population Dataset: A Complete Breakdown of Fort Madison Age Demographics from 0 to 85 Years and Over, Distributed Across 18 Age Groups // 2025 Edition
Last updated February 22, 2025
ACS
Free
Neilsberg
CSV, JSON
2019-2023
CC BY 4.0
About this dataset

Context

The dataset tabulates the Fort Madison 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 Fort Madison. The dataset can be utilized to understand the population distribution of Fort Madison by age. For example, using this dataset, we can identify the largest age group in Fort Madison.

Key observations

The largest age group in Fort Madison, IA was for the group of age 40 to 44 years years with a population of 823 (8.05%), according to the ACS 2019-2023 5-Year Estimates. At the same time, the smallest age group in Fort Madison, IA was the 80 to 84 years years with a population of 224 (2.19%). Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Fort Madison is shown in this column.
  • % of Total Population: This column displays the population of each age group as a proportion of Fort Madison 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 Fort Madison Population by Age. You can refer the same here

Fort Madison, IA Age Cohorts Dataset: Children, Working Adults, and Seniors in Fort Madison - Population and Percentage Analysis // 2025 Edition
Last updated February 22, 2025
ACS
Free
Neilsberg
CSV, JSON
2019-2023
CC BY 4.0
About this dataset

Context

The dataset tabulates the Fort Madison 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 Fort Madison. 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 18 to 64 years with a poulation of 6,210 (60.76% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Fort Madison population analysis. Total expected values are 3 groups ( Children, Working Population and Senior Population).
  • Population: The population for the age cohort in Fort Madison is shown in the following column.
  • Percent of Total Population: The population as a percent of total population of the Fort Madison 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 Fort Madison Population by Age. You can refer the same here

Fort Madison, IA Population Pyramid Dataset: Age Groups, Male and Female Population, and Total Population for Demographics Analysis // 2025 Edition
Last updated February 22, 2025
ACS
Free
Neilsberg
CSV, JSON
2019-2023
CC BY 4.0
About this dataset

Context

The dataset tabulates the data for the Fort Madison, IA population pyramid, which represents the Fort Madison population distribution across age and gender, using estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Fort Madison, IA, is 21.3.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Fort Madison, IA, is 32.7.
  • Total dependency ratio for Fort Madison, IA is 54.1.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Fort Madison, IA is 3.1.
Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2019-2023 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 Fort Madison population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the Fort Madison for the selected age group is shown in the following column.
  • Population (Female): The female population in the Fort Madison for the selected age group is shown in the following column.
  • Total Population: The total population of the Fort Madison 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 Fort Madison 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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Fort Madison, IA Demographics Fort Madison, IA Population

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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