Johnson County, KS Population by Age

The median age in Johnson County, KS is 37.9, as per 2021 ACS 5-Year Estimates. Of the total population, 19.96% were under the age of 15, 18.83% aged 15 to 29, 46.58% aged 30 to 64, 12.76% aged 65 to 84, and 1.87% were 85 years of age and older.
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Updated Sep 17, 2023

Johnson County, KS population age distribution

A complete breakdown of Johnson 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 37,264 6.16%
5 to 9 years 41,907 6.93%
10 to 14 years 41,593 6.87%
15 to 19 years 39,608 6.55%
20 to 24 years 34,414 5.69%
25 to 29 years 39,937 6.6%
30 to 34 years 41,999 6.94%
35 to 39 years 44,984 7.43%
40 to 44 years 41,215 6.81%
45 to 49 years 39,550 6.54%
50 to 54 years 38,552 6.37%
55 to 59 years 38,883 6.43%
60 to 64 years 36,687 6.06%
65 to 69 years 30,596 5.06%
70 to 74 years 23,979 3.96%
75 to 79 years 13,478 2.23%
80 to 84 years 9,187 1.52%
85 years and over 11,321 1.87%
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Johnson County, KS population by age group

Key stats
194,786
Population under 25 years
168,135
Population aged 25-44
153,672
Population aged 45-64
88,561
Population aged 65+

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

The graph shows Johnson 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
Johnson County, KS population by age group. The largest age group was 35-39 years with a poulation of 44,984 (7.43% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Johnson County, KS was for the group of age 35-39 years with a population of 44,984 (7.43%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Johnson County, KS was the 80-84 years with a population of 9,187 (1.52%).

Johnson County, KS population by age cohort

To better understand the age distribution of Johnson County, KS'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 Johnson 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.
Johnson County, KS 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 369,761 (61.10% 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 146,832 24.26%
18 to 64 years 369,761 61.1%
85 years and over 88,561 14.63%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Johnson County's population under 18 was 24.26%, compared to the 22.51% nationwide.
  • Johnson County's working population (between 18 and 64) was 61.10%, compared to 61.45% nationwide.
  • Johnson County's elderly or the senior population (over 65 age) was 14.63% as compared to 16.04% nationwide.

Johnson County, KS population pyramid

Population pyramid for Johnson County, KS 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 Johnson County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Johnson County, KS, is 30.5.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Johnson County, KS, is 22.4.
  • Total dependency ratio for Johnson County, KS is 52.9.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Johnson County, KS is 4.5.
The graph shows Johnson 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.
Johnson County, KS population pyramid i.e. Johnson County population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the Johnson County, KS's male and female population across different age groups:

Age Group Population(Male) Population(Female) Total Population
Under 5 years 18,912 18,352 37,264
5 to 9 years 21,050 20,857 41,907
10 to 14 years 21,635 19,958 41,593
15 to 19 years 20,461 19,147 39,608
20 to 24 years 17,320 17,094 34,414
25 to 29 years 20,287 19,650 39,937
30 to 34 years 21,054 20,945 41,999
35 to 39 years 22,462 22,522 44,984
40 to 44 years 20,704 20,511 41,215
45 to 49 years 19,798 19,752 39,550
50 to 54 years 19,141 19,411 38,552
55 to 59 years 18,720 20,163 38,883
60 to 64 years 17,622 19,065 36,687
65 to 69 years 14,334 16,262 30,596
70 to 74 years 11,320 12,659 23,979
75 to 79 years 6,076 7,402 13,478
80 to 84 years 3,818 5,369 9,187
85 years and over 3,961 7,360 11,321
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Things to know

What is the population of Johnson County, KS under 18?

Johnson County's population under the age of 18 is 146,832, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 24.26% of the total resident population of Johnson County, KS.

What is the aging population in Johnson County, KS?

Johnson County's population aged 65 years and above was 88,561. As per the U.S. Census Bureau's American Community Survey, this population is 14.63% of the entire population.

References

Datasets

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

Key observations

The largest age group in Johnson County, KS was for the group of age 35-39 years with a population of 44,984 (7.43%), according to the 2021 American Community Survey. At the same time, the smallest age group in Johnson County, KS was the 80-84 years with a population of 9,187 (1.52%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

Johnson County, KS Age Cohorts Dataset: Children, Working Adults, and Seniors in Johnson County - 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 Johnson 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 Johnson 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.

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

Johnson County, KS 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 Johnson County, KS population pyramid, which represents the Johnson 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 Johnson County, KS, is 30.5.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Johnson County, KS, is 22.4.
  • Total dependency ratio for Johnson County, KS is 52.9.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Johnson County, KS is 4.5.

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