Missouri Population by Age

The median age in Missouri is 38.8, as per 2021 ACS 5-Year Estimates. Of the total population, 18.75% were under the age of 15, 19.77% aged 15 to 29, 44.65% aged 30 to 64, 14.84% aged 65 to 84, and 2.00% were 85 years of age and older.
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Updated Sep 17, 2023

Missouri population age distribution

A complete breakdown of Missouri'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 367,132 5.98%
5 to 9 years 380,122 6.19%
10 to 14 years 404,107 6.58%
15 to 19 years 401,712 6.54%
20 to 24 years 400,642 6.52%
25 to 29 years 411,737 6.7%
30 to 34 years 402,614 6.56%
35 to 39 years 397,400 6.47%
40 to 44 years 365,684 5.95%
45 to 49 years 363,323 5.92%
50 to 54 years 380,808 6.2%
55 to 59 years 420,482 6.85%
60 to 64 years 411,935 6.71%
65 to 69 years 340,428 5.54%
70 to 74 years 271,181 4.42%
75 to 79 years 180,289 2.94%
80 to 84 years 119,380 1.94%
85 years and over 122,558 2%
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Missouri population by age group

Key stats
1,953,715
Population under 25 years
1,577,435
Population aged 25-44
1,576,548
Population aged 45-64
1,033,836
Population aged 65+

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

The graph shows Missouri'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
Missouri population by age group. The largest age group was 55-59 years with a poulation of 420,482 (6.85% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Missouri was for the group of age 55-59 years with a population of 420,482 (6.85%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Missouri was the 80-84 years with a population of 119,380 (1.94%).

Missouri population by age cohort

To better understand the age distribution of Missouri'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 Missouri'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.
Missouri 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 3,715,323 (60.50% 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 1,392,375 22.67%
18 to 64 years 3,715,323 60.5%
85 years and over 1,033,836 16.83%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Missouri's population under 18 was 22.67%, compared to the 22.51% nationwide.
  • Missouri's working population (between 18 and 64) was 60.50%, compared to 61.45% nationwide.
  • Missouri's elderly or the senior population (over 65 age) was 16.83% as compared to 16.04% nationwide.

Missouri population pyramid

Population pyramid for Missouri 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 Missouri's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Missouri, is 29.1.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Missouri, is 26.1.
  • Total dependency ratio for Missouri is 55.2.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Missouri is 3.8.
The graph shows Missouri'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.
Missouri population pyramid i.e. Missouri population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

Age Group Population(Male) Population(Female) Total Population
Under 5 years 188,129 179,003 367,132
5 to 9 years 196,550 183,572 380,122
10 to 14 years 205,388 198,719 404,107
15 to 19 years 206,518 195,194 401,712
20 to 24 years 203,238 197,404 400,642
25 to 29 years 206,381 205,356 411,737
30 to 34 years 200,482 202,132 402,614
35 to 39 years 200,397 197,003 397,400
40 to 44 years 182,614 183,070 365,684
45 to 49 years 180,652 182,671 363,323
50 to 54 years 188,936 191,872 380,808
55 to 59 years 206,046 214,436 420,482
60 to 64 years 200,852 211,083 411,935
65 to 69 years 161,950 178,478 340,428
70 to 74 years 125,449 145,732 271,181
75 to 79 years 80,868 99,421 180,289
80 to 84 years 49,584 69,796 119,380
85 years and over 43,707 78,851 122,558
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Things to know

What is the population of Missouri under 18?

Missouri's population under the age of 18 is 1,392,375, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 22.67% of the total resident population of Missouri.

What is the aging population in Missouri?

Missouri's population aged 65 years and above was 1,033,836. As per the U.S. Census Bureau's American Community Survey, this population is 16.83% of the entire population.

References

Datasets

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

Key observations

The largest age group in Missouri was for the group of age 55-59 years with a population of 420,482 (6.85%), according to the 2021 American Community Survey. At the same time, the smallest age group in Missouri was the 80-84 years with a population of 119,380 (1.94%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

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

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

Missouri 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 Missouri population pyramid, which represents the Missouri 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 Missouri, is 29.1.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Missouri, is 26.1.
  • Total dependency ratio for Missouri is 55.2.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Missouri is 3.8.

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

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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