Umatilla County
Sign in to savecounty in Oregon, United States
Key facts
- Country
- United States
- State
- Oregon
- Founded
- September 27, 1862
- Named after
- Umatilla River
- Seat
- Pendleton
- Largest city
- Hermiston
- Total
- 3,231 sq mi (8,370 km )
- Land
- 3,216 sq mi (8,330 km )
- Water
- 16 sq mi (41 km ) 0.5%
- Estimate 2025
- 81,119
- Density
- 25/sq mi (9.7/km )
- Time zone
- UTC−8 ( Pacific )
- Summer dst
- UTC−7 ( PDT )
- Congressional district
- 2nd
- Website
- www .co .umatilla .or .us
via Wikipedia infobox
Article
Umatilla County (/ˌjuːməˈtɪlə/) is one of the 36 counties in the U.S. state of Oregon. Its 2020 population of 80,075 ranks it as the 14th largest in Oregon, and largest in Eastern Oregon. Hermiston is the largest and fastest growing city in Umatilla County, but Pendleton remains the county seat. Umatilla County is part of the Hermiston-Pendleton, OR Micropolitan Statistical Area, which has a combined population of 94,833. It is included in the eight-county definition of Eastern Oregon.
The county is named for the Umatilla River.