Multnomah County, Oregon Age & Gender Distribution (2024)
Population distribution by age and gender for Multnomah County, Oregon
Multnomah County, Oregon Age & Gender Statistics (2024)
Total Population
801,477
Median Age
38.7
Male Median
38.4
Female Median
39.0
Multnomah County, Oregon Population Growth

Multnomah County, Oregon Demographic Trend
Since 2010, the population of has changed by +12.6%%.
+12.6%% Growth
Multnomah County, Oregon Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Multnomah County, Oregon Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 38.7 | 801,477 |
| 2023 | 38.5 | 803,863 |
| 2022 | 38.2 | 808,098 |
| 2021 | 37.8 | 810,011 |
| 2020 | 37.5 | 809,869 |
| 2019 | 37.2 | 804,606 |
| 2018 | 37.0 | 798,647 |
| 2017 | 36.8 | 788,459 |
| 2016 | 36.7 | 778,193 |
| 2015 | 36.5 | 768,418 |
| 2014 | 36.3 | 757,371 |
| 2013 | 36.1 | 747,641 |
| 2012 | 35.9 | 737,110 |
| 2011 | 35.8 | 724,803 |
| 2010 | 35.8 | 712,036 |
Multnomah County, Oregon Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 4.6% |
| 5–17 | 13.0% |
| 18–24 | 7.7% |
| 25–34 | 18.0% |
| 35–54 | 30.9% |
| 55–64 | 11.0% |
| 65+ | 14.8% |
Dependency Ratios for Multnomah County, Oregon
- Total Dependency Ratio:
- 47.8
- Youth Dependency:
- 26.0
- Old-Age Dependency:
- 21.8
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Multnomah County, Oregon
The median age in Multnomah County, Oregon is 38.7 years.
According to latest Census data, the total population of Multnomah County, Oregon is 801,477.
In Multnomah County, Oregon, seniors (ages 65+) make up 14.8% of the population, while children under 18 represent 13.0%.
Based on historical data since 2010, the population in Multnomah County, Oregon is aging.