The earliest history of the Nehalem country is so closely entwined with that of the Clatsops of the north and the Tillamooks of the south that its separation is impossible. From the very earliest written record of the Clatsop and Nehalem people, they are described as being culturally, economically, and socially integrated with one-another.
The Confederated Tribes of Coos, Lower Umpqua, and Siuslaw Indians trace their ancestry back to the aboriginal inhabitants of the South-Central coast of Oregon. The confederation is made up of three tribes (four Bands): two bands of Coos Tribes: Hanis Coos (Coos Proper), and Miluk Coos; the Lower Umpqua Tribe; and Siuslaw Tribe.
Twenty-seven native American tribes make up the modern day tribe known as the Confederated Tribes of the Grand Ronde Community of Oregon.