The Sahaptin are a number of Native American tribes who speak dialects of the Sahaptin language. The Sahaptin tribes inhabited territory along the Columbia River and its tributaries in the Pacific Northwest region of the United States. Sahaptin-speaking peoples included the Klickitat, Kittitas, Yakama, Wanapum, Palus, Lower Snake, Skinpah, Walla Walla, Umatilla, Tenino, and Nez Perce.