Maricopa County, AZ Population by Age

The median age in Maricopa County, AZ is 36.9, as per 2021 ACS 5-Year Estimates. Of the total population, 19.59% were under the age of 15, 20.75% aged 15 to 29, 44.50% aged 30 to 64, 13.43% aged 65 to 84, and 1.74% were 85 years of age and older.
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Updated Sep 17, 2023

Maricopa County, AZ population age distribution

A complete breakdown of Maricopa 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 265,641 6.08%
5 to 9 years 281,715 6.45%
10 to 14 years 308,229 7.06%
15 to 19 years 297,225 6.81%
20 to 24 years 285,968 6.55%
25 to 29 years 322,937 7.39%
30 to 34 years 309,878 7.1%
35 to 39 years 292,624 6.7%
40 to 44 years 283,951 6.5%
45 to 49 years 278,017 6.37%
50 to 54 years 269,065 6.16%
55 to 59 years 266,073 6.09%
60 to 64 years 243,607 5.58%
65 to 69 years 209,957 4.81%
70 to 74 years 180,866 4.14%
75 to 79 years 119,742 2.74%
80 to 84 years 75,781 1.74%
85 years and over 75,910 1.74%
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Maricopa County, AZ population by age group

Key stats
1,438,778
Population under 25 years
1,209,390
Population aged 25-44
1,056,762
Population aged 45-64
662,256
Population aged 65+

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

The graph shows Maricopa 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
Maricopa County, AZ population by age group. The largest age group was 25-29 years with a poulation of 322,937 (7.39% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Maricopa County, AZ was for the group of age 25-29 years with a population of 322,937 (7.39%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Maricopa County, AZ was the 80-84 years with a population of 75,781 (1.74%).

Maricopa County, AZ population by age cohort

To better understand the age distribution of Maricopa County, AZ'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 Maricopa 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.
Maricopa County, AZ 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 2,667,950 (61.09% 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 1,036,980 23.74%
18 to 64 years 2,667,950 61.09%
85 years and over 662,256 15.16%
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Key stats for each age cohort as per our analysis of U.S. Census Bureau American Community Survey:

  • Maricopa County's population under 18 was 23.74%, compared to the 22.51% nationwide.
  • Maricopa County's working population (between 18 and 64) was 61.09%, compared to 61.45% nationwide.
  • Maricopa County's elderly or the senior population (over 65 age) was 15.16% as compared to 16.04% nationwide.

Maricopa County, AZ population pyramid

Population pyramid for Maricopa County, AZ 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 Maricopa County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Maricopa County, AZ, is 30.0.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Maricopa County, AZ, is 23.2.
  • Total dependency ratio for Maricopa County, AZ is 53.3.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Maricopa County, AZ is 4.3.
The graph shows Maricopa 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.
Maricopa County, AZ population pyramid i.e. Maricopa County population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the Maricopa County, AZ's male and female population across different age groups:

Age Group Population(Male) Population(Female) Total Population
Under 5 years 135,851 129,790 265,641
5 to 9 years 144,739 136,976 281,715
10 to 14 years 156,586 151,643 308,229
15 to 19 years 152,385 144,840 297,225
20 to 24 years 146,138 139,830 285,968
25 to 29 years 163,681 159,256 322,937
30 to 34 years 157,714 152,164 309,878
35 to 39 years 148,056 144,568 292,624
40 to 44 years 142,769 141,182 283,951
45 to 49 years 138,686 139,331 278,017
50 to 54 years 134,351 134,714 269,065
55 to 59 years 130,198 135,875 266,073
60 to 64 years 117,839 125,768 243,607
65 to 69 years 97,157 112,800 209,957
70 to 74 years 84,371 96,495 180,866
75 to 79 years 55,745 63,997 119,742
80 to 84 years 34,548 41,233 75,781
85 years and over 29,336 46,574 75,910
Exploring Maricopa County's Diversity? Request Customized Data Now!

Things to know

What is the population of Maricopa County, AZ under 18?

Maricopa County's population under the age of 18 is 1,036,980, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 23.74% of the total resident population of Maricopa County, AZ.

What is the aging population in Maricopa County, AZ?

Maricopa County's population aged 65 years and above was 662,256. As per the U.S. Census Bureau's American Community Survey, this population is 15.16% of the entire population.

References

Datasets

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

Key observations

The largest age group in Maricopa County, AZ was for the group of age 25-29 years with a population of 322,937 (7.39%), according to the 2021 American Community Survey. At the same time, the smallest age group in Maricopa County, AZ was the 80-84 years with a population of 75,781 (1.74%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

Maricopa County, AZ Age Cohorts Dataset: Children, Working Adults, and Seniors in Maricopa 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 Maricopa 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 Maricopa 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.

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

Maricopa County, AZ 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 Maricopa County, AZ population pyramid, which represents the Maricopa 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 Maricopa County, AZ, is 30.0.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Maricopa County, AZ, is 23.2.
  • Total dependency ratio for Maricopa County, AZ is 53.3.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Maricopa County, AZ is 4.3.

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

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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