Oregon Penutian is a hypotheticallanguage family in thePenutian language phylum comprising languages spoken at one time by several groups ofNative Americans in present-day westernOregon and westernWashington in theUnited States. Various languages in the family are divided by dialects that are in most cases identical to the various identified tribal bands in the region.

The languages were spoken largely along both banks of the lower and middleColumbia River, in theWillamette Valley, in the OregonCascade Range, along theOregon Coast, and in the valleys of theUmpqua andRogue rivers. The area in which the languages were spoken includes the most populated areas of Oregon today.

Languages in the Oregon Penutian family are:

• Kalapuyan
• Takelma
• Coast Oregon group
  • Alsean
  • Siuslaw
  • Coosan

Recent internal classifications of Penutian, such as that of Scott DeLancey, have abandoned Oregon Penutian, while retaining the Coast Oregon Penutian family.

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• Indigenous languages of the North American Plateau
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