OR · CountyUmatilla County, Oregon12 cities in the directoryCitiesCityPopulationRegionAdams389—Athena1,184—Echo627—Helix192—Hermiston19,746—Milton-Freewater7,011—Pendleton17,026—Pilot Rock1,313—Stanfield2,118—Ukiah223—Umatilla7,899—Weston705—