Marion County, Oregon Age & Gender Distribution (2024)
Population distribution by age and gender for Marion County, Oregon
Marion County, Oregon Age & Gender Statistics (2024)
Total Population
349,244
Median Age
37.5
Male Median
36.5
Female Median
38.5
Marion County, Oregon Population Growth
Marion County, Oregon Demographic Trend
Since 2010, the population of has changed by +12.7%%.
+12.7%% Growth
Marion County, Oregon Age & Gender Pyramid
Figure 2: Population distribution by age and gender for 2024.
Marion County, Oregon Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 37.5 | 349,244 |
| 2023 | 37.2 | 346,532 |
| 2022 | 37.0 | 345,815 |
| 2021 | 37.0 | 344,037 |
| 2020 | 36.9 | 343,742 |
| 2019 | 36.6 | 339,641 |
| 2018 | 36.4 | 335,553 |
| 2017 | 36.2 | 330,453 |
| 2016 | 36.0 | 326,527 |
| 2015 | 35.8 | 323,259 |
| 2014 | 35.6 | 320,448 |
| 2013 | 35.3 | 318,441 |
| 2012 | 35.1 | 315,391 |
| 2011 | 35.1 | 313,020 |
| 2010 | 35.0 | 309,894 |
Marion County, Oregon Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 5.9% |
| 5–17 | 17.7% |
| 18–24 | 9.3% |
| 25–34 | 14.1% |
| 35–54 | 24.9% |
| 55–64 | 11.5% |
| 65+ | 16.7% |
Dependency Ratios for Marion County, Oregon
- Total Dependency Ratio:
- 67.4
- Youth Dependency:
- 39.4
- Old-Age Dependency:
- 28.0
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Marion County, Oregon
The median age in Marion County, Oregon is 37.5 years.
According to latest Census data, the total population of Marion County, Oregon is 349,244.
In Marion County, Oregon, seniors (ages 65+) make up 16.7% of the population, while children under 18 represent 17.7%.
Based on historical data since 2010, the population in Marion County, Oregon is aging.