How many people live in Umatilla County, OR?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 80,500 people living in Umatilla County, OR. That makes Umatilla County the 14th-most populous county in Oregon. It is home to 1.9% of people living in the state.
80.5K
population of Umatilla County, OR (2024)
1.9%
County share of the Oregon population (2024)
About 80,500 people lived in Umatilla County, OR in 2024.
Population estimates, 2000–2024
What are Umatilla County, OR’s age demographics?
About 13,500 Umatilla County residents are aged 65 and older in 2024. That represents 16.7% of its population. For comparison, the age group represents 19.9% of Oregon’s population and 18% in the US overall.
Another 19,300 Umatilla County, OR residents, or 24% of the population, were children under 18. For comparison, the age group represents 19.3% of Oregon’s population and 21.6% in the US overall.
A higher share of Umatilla County, OR's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Umatilla County, OR’s racial and ethnic demographics?
Non-Hispanic white residents make up 61.7% of the Umatilla County, OR population, higher than the national share of 57.5%. Umatilla County also has a larger share of people identifying as Hispanic (31.1%) than the US overall (20%).
In contrast, Umatilla County’s non-Hispanic Black or African American population accounts for 0.98%, below the 12.6% nationwide, and the non-Hispanic Asian population makes up 0.88% of the county, compared with 6.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Umatilla County, OR has a higher share of a Hispanic population than Oregon as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Umatilla County, OR is Hermiston with about 19,700 residents in 2024.
Cities and towns in Umatilla County, OR ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Hermiston | 19,746 |
| 2. | Pendleton | 17,026 |
| 3. | Umatilla | 7,899 |
| 4. | Milton-Freewater | 7,011 |
| 5. | Stanfield | 2,118 |
| 6. | Pilot Rock | 1,313 |
| 7. | Athena | 1,184 |
| 8. | Weston | 705 |
| 9. | Echo | 627 |
| 10. | Adams | 389 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
