Arapahoe County, CO Population by Age

The median age in Arapahoe County, CO is 37.1, as per 2018-2022 ACS 5 -Year Estimates. Of the total population, 18.82% were under the age of 15, 20.06% aged 15 to 29, 47.38% aged 30 to 64, 12.19% aged 65 to 84, and 1.55% were 85 years of age and older.
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Updated Jul 26, 2024

Arapahoe County, CO population age distributions

A complete breakdown of Arapahoe 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 38,209 5.84%
5 to 9 years 41,912 6.4%
10 to 14 years 43,057 6.58%
15 to 19 years 41,234 6.3%
20 to 24 years 39,960 6.11%
25 to 29 years 50,067 7.65%
30 to 34 years 51,910 7.93%
35 to 39 years 48,946 7.48%
40 to 44 years 47,504 7.26%
45 to 49 years 43,337 6.62%
50 to 54 years 40,617 6.21%
55 to 59 years 39,020 5.96%
60 to 64 years 38,718 5.92%
65 to 69 years 31,259 4.78%
70 to 74 years 24,900 3.8%
75 to 79 years 14,560 2.22%
80 to 84 years 9,106 1.39%
85 years and over 10,137 1.55%
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Arapahoe County, CO population by age group

Key stats
204,372
Population under 25 years
198,427
Population aged 25-44
161,692
Population aged 45-64
89,962
Population aged 65+

Sources: U.S. Census Bureau, American Community Survey (ACS) 2018-2022

FIGURE 1

Arapahoe County, CO population by age group.

The largest age group is 30 to 34 years with a population of 51,910 (7.93% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.

The largest age group in Arapahoe County, CO was for the group of age 30 to 34 years with a population of 51,910 (7.93%), according to the 2018-2022 American Community Survey.

At the same time, the smallest age group in Arapahoe County, CO was the 80 to 84 years with a population of 9,106 (1.39%).

Arapahoe County, CO population by age cohort

To better understand the age distribution of Arapahoe County, CO'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

Arapahoe County, CO population by age cohort

The largest age group was 18 to 64 years with a population of 414,765 (63.38% of the total population).

Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.

Arapahoe County, CO population by age cohort

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

Age Group Population % of Total Population
Under 18 years 149,726 22.88%
18 to 64 years 414,765 63.38%
65 years and over 89,962 13.75%
Exploring Arapahoe County's Diversity? Request Customized Data Now!

Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Arapahoe County 's population under 18 was 22.88%, compared to the 22.11% nationwide.
  • Arapahoe County's working population (between 18 and 64) was 63.38%, compared to 61.36% nationwide.
  • Arapahoe County's elderly or the senior population (over 65 age) was 13.75% as compared to 16.53% nationwide.

Arapahoe County, CO population pyramid

Population pyramid for Arapahoe County, CO 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 Arapahoe County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Arapahoe County, CO, is 27.9.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Arapahoe County, CO, is 20.4.
  • Total dependency ratio for Arapahoe County, CO is 48.3.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Arapahoe County, CO is 4.9.

FIGURE 3

Arapahoe County, CO population pyramid

Arapahoe County 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) 2018-2022 5-Year Estimates.

Arapahoe County, CO population pyramid

Here's the Arapahoe County, CO's male and female population across different age groups .

Age Group Population(Male) Population(Female) Total Population
Under 5 years 19,450 18,759 38,209
5 to 9 years 20,730 21,182 41,912
10 to 14 years 22,879 20,178 43,057
15 to 19 years 21,303 19,931 41,234
20 to 24 years 20,447 19,513 39,960
25 to 29 years 25,905 24,162 50,067
30 to 34 years 26,828 25,082 51,910
35 to 39 years 25,181 23,765 48,946
40 to 44 years 24,245 23,259 47,504
45 to 49 years 21,961 21,376 43,337
50 to 54 years 20,457 20,160 40,617
55 to 59 years 19,539 19,481 39,020
60 to 64 years 18,428 20,290 38,718
65 to 69 years 14,849 16,410 31,259
70 to 74 years 11,309 13,591 24,900
75 to 79 years 6,216 8,344 14,560
80 to 84 years 3,795 5,311 9,106
85 years and over 3,634 6,503 10,137
Exploring Arapahoe County's Diversity? Request Customized Data Now!

Things to know

What is the population of Arapahoe County, CO under 18?

Arapahoe County's population under the age of 18 is 149,726, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 22.88% of the total resident population of Arapahoe County, CO.

What is the aging population in Arapahoe County, CO?

Arapahoe County's population aged 65 years and above was 89,962. As per the U.S. Census Bureau's American Community Survey, this population is 13.75% of the entire population.

References

Datasets

Explore datasets by year of publication.
2024
Arapahoe County, CO Age Group Population Dataset: A Complete Breakdown of Arapahoe County Age Demographics from 0 to 85 Years and Over, Distributed Across 18 Age Groups // 2024 Edition
Last updated July 24, 2024
ACS
Free
Neilsberg
CSV, JSON
2018-2022
CC BY 4.0
About this dataset

Context

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

Key observations

The largest age group in Arapahoe County, CO was for the group of age 30 to 34 years years with a population of 51,910 (7.93%), according to the ACS 2018-2022 5-Year Estimates. At the same time, the smallest age group in Arapahoe County, CO was the 80 to 84 years years with a population of 9,106 (1.39%). Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 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 Arapahoe County is shown in this column.
  • % of Total Population: This column displays the population of each age group as a proportion of Arapahoe 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 Arapahoe County Population by Age. You can refer the same here

Arapahoe County, CO Age Cohorts Dataset: Children, Working Adults, and Seniors in Arapahoe County - Population and Percentage Analysis // 2024 Edition
Last updated July 24, 2024
ACS
Free
Neilsberg
CSV, JSON
2018-2022
CC BY 4.0
About this dataset

Context

The dataset tabulates the Arapahoe 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 Arapahoe 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 18 to 64 years with a poulation of 414,765 (63.38% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2018-2022 5-Year Estimates.

Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 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 Arapahoe County population analysis. Total expected values are 3 groups ( Children, Working Population and Senior Population).
  • Population: The population for the age cohort in Arapahoe County is shown in the following column.
  • Percent of Total Population: The population as a percent of total population of the Arapahoe 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 Arapahoe County Population by Age. You can refer the same here

Arapahoe County, CO Population Pyramid Dataset: Age Groups, Male and Female Population, and Total Population for Demographics Analysis // 2024 Edition
Last updated July 24, 2024
ACS
Free
Neilsberg
CSV, JSON
2018-2022
CC BY 4.0
About this dataset

Context

The dataset tabulates the data for the Arapahoe County, CO population pyramid, which represents the Arapahoe County population distribution across age and gender, using estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 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 Arapahoe County, CO, is 27.9.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Arapahoe County, CO, is 20.4.
  • Total dependency ratio for Arapahoe County, CO is 48.3.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Arapahoe County, CO is 4.9.
Content

When available, the data consists of estimates from the U.S. Census Bureau American Community Survey (ACS) 2018-2022 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 Arapahoe County population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the Arapahoe County for the selected age group is shown in the following column.
  • Population (Female): The female population in the Arapahoe County for the selected age group is shown in the following column.
  • Total Population: The total population of the Arapahoe 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 Arapahoe 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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