State of Oregon A state in the Pacific Northwest region of the United States. Oregon is located on the Pacific coast between Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern boundaries respectively. LanguaL curation note: US FDA 1995 Code: US41 oregon West Region State of Oregon A state in the Pacific Northwest region of the United States. Oregon is located on the Pacific coast between Washington to the north, California to the south, Nevada on the southeast and Idaho to the east. The Columbia and Snake rivers delineate much of Oregon's northern and eastern boundaries respectively. LanguaL curation note: US FDA 1995 Code: US41 oregon West Region