Umatilla County, Oregon Age & Gender Distribution (2024)
Population distribution by age and gender for Umatilla County, Oregon
Umatilla County, Oregon Age & Gender Statistics (2024)
Total Population
79,940
Median Age
36.9
Male Median
36.0
Female Median
38.5
Umatilla County, Oregon Population Growth

Umatilla County, Oregon Demographic Trend
Since 2010, the population of has changed by +6.9%%.
+6.9%% Growth
Umatilla County, Oregon Age & Gender Pyramid

Figure 2: Population distribution by age and gender for 2024.
Umatilla County, Oregon Historical Population Data
| Year | Median Age | Population |
|---|---|---|
| 2024 | 36.9 | 79,940 |
| 2023 | 36.7 | 80,087 |
| 2022 | 36.9 | 79,904 |
| 2021 | 36.8 | 79,509 |
| 2020 | 36.7 | 77,319 |
| 2019 | 36.5 | 77,129 |
| 2018 | 36.3 | 76,898 |
| 2017 | 36.1 | 76,736 |
| 2016 | 35.9 | 76,582 |
| 2015 | 36.0 | 76,738 |
| 2014 | 35.9 | 76,645 |
| 2013 | 35.7 | 76,306 |
| 2012 | 35.7 | 75,846 |
| 2011 | 35.7 | 75,344 |
| 2010 | 35.6 | 74,804 |
Umatilla County, Oregon Age Group Breakdown (2024)
| Age Cohort | Percentage |
|---|---|
| Under 5 | 6.1% |
| 5–17 | 18.5% |
| 18–24 | 8.9% |
| 25–34 | 14.4% |
| 35–54 | 24.5% |
| 55–64 | 11.3% |
| 65+ | 16.4% |
Dependency Ratios for Umatilla County, Oregon
- Total Dependency Ratio:
- 69.4
- Youth Dependency:
- 41.6
- Old-Age Dependency:
- 27.7
The dependency ratio measures dependents (ages 0-17 and 65+) per 100 working-age individuals (ages 18-64).
Age & Gender FAQs for Umatilla County, Oregon
The median age in Umatilla County, Oregon is 36.9 years.
According to latest Census data, the total population of Umatilla County, Oregon is 79,940.
In Umatilla County, Oregon, seniors (ages 65+) make up 16.4% of the population, while children under 18 represent 18.5%.
Based on historical data since 2010, the population in Umatilla County, Oregon has remained stable.