Umatilla County is a district of Oregon.
Boundaries: United States Census Bureau, MAF/TIGER Database (https://www.census.gov/geographies/mapping-files/time-series/geo/carto-boundary-file.html) via geoBoundaries, public domain
| City of Adams | no seat recorded | |
| City of Athena | no seat recorded | |
| City of Umatilla | no seat recorded |
Nothing has been written about Umatilla County here, and neither Wikipedia nor Wikivoyage has an article we could draw one from. If you know the place, that makes you a better source than anything we have. Tell us what is worth knowing and where you got it.
We show Pendleton as the capital of Umatilla County. If that is wrong, tell us what it should be and where you read it.
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