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Collection 5 Resources

Multnomah County, OR Population by Age

The median age in Multnomah County, OR is 37.8, as per 2021 ACS 5-Year Estimates. Of the total population, 15.56% were under the age of 15, 19.68% aged 15 to 29, 51.22% aged 30 to 64, 12.04% aged 65 to 84, and 1.51% were 85 years of age and older.
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By Neilsberg Research
Updated Sep 17, 2023

Multnomah County, OR population age distribution

A complete breakdown of Multnomah 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 41,109 5.08%
5 to 9 years 41,790 5.16%
10 to 14 years 43,102 5.32%
15 to 19 years 40,754 5.03%
20 to 24 years 46,570 5.75%
25 to 29 years 72,054 8.9%
30 to 34 years 77,854 9.61%
35 to 39 years 72,654 8.97%
40 to 44 years 63,778 7.87%
45 to 49 years 57,518 7.1%
50 to 54 years 50,765 6.27%
55 to 59 years 46,893 5.79%
60 to 64 years 45,417 5.61%
65 to 69 years 41,031 5.07%
70 to 74 years 29,804 3.68%
75 to 79 years 17,118 2.11%
80 to 84 years 9,571 1.18%
85 years and over 12,229 1.51%
Exploring Multnomah County's Diversity? Request Customized Data Now!

TABLE OF CONTENTS

Multnomah County, OR population by age group

Key stats
213,325
Population under 25 years
286,340
Population aged 25-44
200,593
Population aged 45-64
109,753
Population aged 65+

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

The graph shows Multnomah 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
Multnomah County, OR population by age group. The largest age group was 30-34 years with a poulation of 77,854 (9.61% of the total population). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

The largest age group in Multnomah County, OR was for the group of age 30-34 years with a population of 77,854 (9.61%), according to the 2021 American Community Survey.

At the same time, the smallest age group in Multnomah County, OR was the 80-84 years with a population of 9,571 (1.18%).

Multnomah County, OR population by age cohort

To better understand the age distribution of Multnomah County, OR'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 Multnomah 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.
Multnomah County, OR 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 549,833 (67.88% 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 150,425 18.57%
18 to 64 years 549,833 67.88%
85 years and over 109,753 13.55%
Exploring Multnomah 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:

  • Multnomah County's population under 18 was 18.57%, compared to the 22.51% nationwide.
  • Multnomah County's working population (between 18 and 64) was 67.88%, compared to 61.45% nationwide.
  • Multnomah County's elderly or the senior population (over 65 age) was 13.55% as compared to 16.04% nationwide.

Multnomah County, OR population pyramid

Population pyramid for Multnomah County, OR 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 Multnomah County's population pyramid:

  • Youth dependency ratio, which is the number of children aged 0-14 per 100 persons aged 15-64, for Multnomah County, OR, is 21.9.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Multnomah County, OR, is 19.1.
  • Total dependency ratio for Multnomah County, OR is 41.1.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Multnomah County, OR is 5.2.
The graph shows Multnomah 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.
Multnomah County, OR population pyramid i.e. Multnomah County population distrubution across age and gender. Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

Here's the Multnomah County, OR's male and female population across different age groups:

Age Group Population(Male) Population(Female) Total Population
Under 5 years 21,125 19,984 41,109
5 to 9 years 21,152 20,638 41,790
10 to 14 years 22,193 20,909 43,102
15 to 19 years 20,690 20,064 40,754
20 to 24 years 22,752 23,818 46,570
25 to 29 years 35,177 36,877 72,054
30 to 34 years 38,961 38,893 77,854
35 to 39 years 36,664 35,990 72,654
40 to 44 years 32,853 30,925 63,778
45 to 49 years 29,723 27,795 57,518
50 to 54 years 26,203 24,562 50,765
55 to 59 years 23,761 23,132 46,893
60 to 64 years 22,199 23,218 45,417
65 to 69 years 19,656 21,375 41,031
70 to 74 years 13,814 15,990 29,804
75 to 79 years 7,467 9,651 17,118
80 to 84 years 4,049 5,522 9,571
85 years and over 4,305 7,924 12,229
Exploring Multnomah County's Diversity? Request Customized Data Now!

Things to know

What is the population of Multnomah County, OR under 18?

Multnomah County's population under the age of 18 is 150,425, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 18.57% of the total resident population of Multnomah County, OR.

What is the aging population in Multnomah County, OR?

Multnomah County's population aged 65 years and above was 109,753. As per the U.S. Census Bureau's American Community Survey, this population is 13.55% of the entire population.

References

Datasets

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

Key observations

The largest age group in Multnomah County, OR was for the group of age 30-34 years with a population of 77,854 (9.61%), according to the 2021 American Community Survey. At the same time, the smallest age group in Multnomah County, OR was the 80-84 years with a population of 9,571 (1.18%). Source: U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates.

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

Multnomah County, OR Age Cohorts Dataset: Children, Working Adults, and Seniors in Multnomah 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 Multnomah 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 Multnomah 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.

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

Multnomah County, OR 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 Multnomah County, OR population pyramid, which represents the Multnomah 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 Multnomah County, OR, is 21.9.
  • Old-age dependency ratio, which is the number of persons aged 65 or over per 100 persons aged 15-64, for Multnomah County, OR, is 19.1.
  • Total dependency ratio for Multnomah County, OR is 41.1.
  • Potential support ratio, which is the number of youth (working age population) per elderly, for Multnomah County, OR is 5.2.

Multnomah 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 Multnomah County population analysis. Total expected values are 18 and are define above in the age groups section.
  • Population (Male): The male population in the Multnomah County for the selected age group is shown in the following column.
  • Population (Female): The female population in the Multnomah County for the selected age group is shown in the following column.
  • Total Population: The total population of the Multnomah 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 Multnomah 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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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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Collection 5 Resources