[1] In 1842, an Indian subagency for the "country West of the Rocky mountains" was established and located in Oregon City in the Willamette Valley.
The Indian agencies in Oregon Territory were Coast (Siletz), Alsea, Grand Ronde, Warm Springs, Umatilla, Klamath, Nez Perce and Malheur.
The Oregon Territory also had numerous Indian management DistrictsPuget Sound District, Southeastern District, Port Orford, Eastern (east of Cascades), Western (west of Cascades), Northern (north of the Columbia until the Washington Territory was sectioned off) Umpqua, Astoria (north Oregon coast and lower Columbia), Willamette Valley, Umpqua Valley, Klamath, and Rogue River.
The agency structure in Oregon was complicated because of the removal of Indians from their original homes and the attempt to concentrate them on reservations.
[3] A partial list of the tribes that were assigned to the Oregon Superintendency were the Cayuse, Chastacosta, Chetco, Clackamas, Joshua, Kalapuya, Klamath, Modoc, Molala, Nez Perce, Paiute, Rogue River, Shasta, Sixes (Kwatami), "Snake", Tenino, Umatilla, Umpqua, Wallawalla, Warm Springs, Wasco, and Yamel.