The Siuslaw were one of the numerous groups encountered by the Corps of Discovery at Fort Clatsop on the Pacific coast. Traditionally they lived near the Oregon coast on the Siuslaw River.
A 1910 census reported just seven members of the tribe remaining. Like some other West Coast Indians, their tribal charter was revoked in the early 20th century. In 1984 that charter was restored. Today the Siuslaw are part of the Confederated Siletz Indians of Oregon. Their language is thought to be extinct.