Multnomah County, OR population age distributions
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 | 37,913 | 4.72% |
| 5 to 9 years | 38,678 | 4.81% |
| 10 to 14 years | 42,804 | 5.32% |
| 15 to 19 years | 40,711 | 5.06% |
| 20 to 24 years | 46,229 | 5.75% |
| 25 to 29 years | 68,194 | 8.48% |
| 30 to 34 years | 77,746 | 9.67% |
| 35 to 39 years | 69,797 | 8.68% |
| 40 to 44 years | 67,598 | 8.41% |
| 45 to 49 years | 56,992 | 7.09% |
| 50 to 54 years | 52,351 | 6.51% |
| 55 to 59 years | 44,654 | 5.55% |
| 60 to 64 years | 44,535 | 5.54% |
| 65 to 69 years | 39,956 | 4.97% |
| 70 to 74 years | 33,233 | 4.13% |
| 75 to 79 years | 19,714 | 2.45% |
| 80 to 84 years | 10,777 | 1.34% |
| 85 years and over | 11,981 | 1.49% |
TABLE OF CONTENTS
Multnomah County, OR population by age group
Sources: U.S. Census Bureau, American Community Survey (ACS) 2019-2023
FIGURE 1
Multnomah County, OR population by age group.
The largest age group is 30 to 34 years with a population of 77,746 (9.67% of the total population).
The largest age group in Multnomah County, OR was for the group of age 30 to 34 years with a population of 77,746 (9.67%), according to the 2019-2023 American Community Survey.
At the same time, the smallest age group in Multnomah County, OR was the 80 to 84 years with a population of 10,777 (1.34%).
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
FIGURE 2
Multnomah County, OR population by age cohort
The largest age group was 18 to 64 years with a population of 544,113 (67.69% of the total population).
Multnomah County, OR population by age cohort
Here's the population for each of the three cohorts.
| Age Group | Population | % of Total Population |
|---|---|---|
| Under 18 years | 144,089 | 17.92% |
| 18 to 64 years | 544,113 | 67.69% |
| 65 years and over | 115,661 | 14.39% |
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 17.92%, compared to the 22.16% nationwide.
- Multnomah County's working population (between 18 and 64) was 67.69%, compared to 61% nationwide.
- Multnomah County's elderly or the senior population (over 65 age) was 14.39% as compared to 16.84% 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 21.0.
- 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 20.3.
- Total dependency ratio for Multnomah County, OR is 41.3.
- Potential support ratio, which is the number of youth (working age population) per elderly, for Multnomah County, OR is 4.9.
FIGURE 3
Multnomah County, OR population pyramid
Multnomah County population distrubution across age and gender. A wide base suggests population increase, narrow base indicates declining birth rates.
Multnomah County, OR population pyramid
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 | 19,588 | 18,325 | 37,913 |
| 5 to 9 years | 19,982 | 18,696 | 38,678 |
| 10 to 14 years | 21,681 | 21,123 | 42,804 |
| 15 to 19 years | 20,700 | 20,011 | 40,711 |
| 20 to 24 years | 22,634 | 23,595 | 46,229 |
| 25 to 29 years | 33,140 | 35,054 | 68,194 |
| 30 to 34 years | 38,991 | 38,755 | 77,746 |
| 35 to 39 years | 35,320 | 34,477 | 69,797 |
| 40 to 44 years | 34,586 | 33,012 | 67,598 |
| 45 to 49 years | 29,516 | 27,476 | 56,992 |
| 50 to 54 years | 27,107 | 25,244 | 52,351 |
| 55 to 59 years | 23,522 | 21,132 | 44,654 |
| 60 to 64 years | 21,398 | 23,137 | 44,535 |
| 65 to 69 years | 18,524 | 21,432 | 39,956 |
| 70 to 74 years | 16,031 | 17,202 | 33,233 |
| 75 to 79 years | 8,632 | 11,082 | 19,714 |
| 80 to 84 years | 4,336 | 6,441 | 10,777 |
| 85 years and over | 4,551 | 7,430 | 11,981 |
Things to know
What is the population of Multnomah County, OR under 18?
Multnomah County's population under the age of 18 is 144,089, as per the latest U.S. Census Bureau's American Community Survey estimates. This population is 17.92% 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 115,661. As per the U.S. Census Bureau's American Community Survey, this population is 14.39% of the entire population.
References
- U.S. Census Bureau American Community Survey (ACS) 2019-2023 5-Year Estimates