The Chinook Indian Nation is made up of the five western-most Chinookan speaking tribes at the mouth of the Columbia River. The Chinook Indian Nation’s nearly 70-year-old constitution identifies their five constituent tribes – the Clatsop and Cathlamet (Kathlamet) of present-day Oregon and the Lower Chinook, Wahkiakum (Waukikum) and Willapa (Weelappa) of what is now Washington State.