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 in the Pacific Northwest region of the United States. Sahaptin-speaking peoples included the Klickitat, Kittitas, Yakama, Wanapum, Palus, Lower Snake, Walla Walla, Umatilla, and Tenino.
The prominent Sahaptin people formerly held a considerable territory in western Idaho and adjacent portions of Oregon and Washington, including the lower Snake River, with its tributaries the Salmon, Clearwater, and Grand Ronde rivers, from about 45° latitude down nearly to the entrance of the Palouse, and from the Blue Mountains of Oregon on the west to the main divide of the Bitterroot Mountains on the east.
They are of the Shahaptian linguistic stock, to which belong also the Nez Perce, with whom they maintained close friendly relations, while frequently at variance with the Salishan tribes on their northern border — the Flatheads, Coeur d'Alene and Spokane — and in chronic warfare with the Blackfeet, Crows and Shoshoni on the east and south.