Umatilla County | |
|---|---|
 Stafford Hansell Government Center in Hermiston | |
 Location within the U.S. state of Oregon | |
 Oregon's location within the U.S. | |
| Coordinates: 45°22′30″N 118°45′05″W / 45.375131°N 118.7513661°W | |
| Country |  United States |
| State |  Oregon |
| Founded | September 27, 1862 |
| Named for | Umatilla River |
| Seat | Pendleton |
| Largest city | Hermiston |
| Area | |
| • Total | 3,231 sq mi (8,370 km2) |
| • Land | 3,216 sq mi (8,330 km2) |
| • Water | 16 sq mi (40 km2) 0.5% |
| Population (2020) | |
| • Total | 80,075 |
| • Estimate (2023) | 80,053  |
| • Density | 20/sq mi (9/km2) |
| Time zone | UTC−8 (Pacific) |
| • Summer (DST) | UTC−7 (PDT) |
| Congressional district | 2nd |
| Website | www |
Umatilla County (/ˌjuːməˈtɪlə/) is one of the 36 counties in the U.S. state of Oregon. The population of 81,826 ranks it as the 14th largest in Oregon, and largest in Eastern Oregon.[1] Hermiston is the largest city in Umatilla County, but Pendleton remains the county seat.[2] Umatilla County is part of the Hermiston-Pendleton, OR Micropolitan Statistical Area, which has a combined population of 94,833.[3] It is included in the eight-county definition of Eastern Oregon.
The county is named for the Umatilla River.
- ^ "Population Estimate Reports". Portland State University. December 18, 2023. Retrieved December 19, 2023.
- ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
- ^ "Population Estimate Reports". Portland State University. December 18, 2023. Retrieved December 19, 2023.