Sinkiuse

The Sinkiuse are an Interior Salish people of the middle Columbia River in present-day Washington State, whose villages lined the east bank from Fort Okanogan to Point Eaton. They comprised three bands, the Nkee'us in the Umatilla valley, the Stata'ketux around White Bluffs, and the river band later called the Moses-Columbia, and spoke the Columbia-Moses dialect of Southern Interior Salish.

Their tradition traced their ancestors to a migration from the north, and their hunting grounds ran from the Badger Mountains to the Grand Coulee and the chain of lakes around Moses Lake.

James Mooney put their population at about eight hundred in 1780, before the smallpox epidemics, and in July 1811 the North West Company fur trader David Thompson met their Rock Island band, led by a chief he recorded as Half-Sun.