Umatilla County, county in Oregon, United States. As of 2020 county had an estimated population of 77,752 inhabitants. The county was created 161 years ago in 1862. Its county seat is "Pendleton".
There are 0 city/town in Umatilla County, OR.
Cities, Towns, Neighborhoods & Other Populated Places in Umatilla County.
| City Name | Title | County | Population |
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