Oregon Penutian is a hypothetical language family in the Penutian language phylum comprising languages spoken at one time by several groups of Native Americans in present-day western Oregon and western Washington in the United 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. Languages in the Oregon Penutian family are: * Kalapuyan * Takelma * Coast Oregon group * Alsean * Siuslaw * Coosan