A tribe of American Indians that speaks an Algonquian language (Sauk-Fox) related to the Kickapoo language. The Sauk probably lived in the Saginaw Valley of Michigan in the early 1600s, but they had moved to the Green Bay region of eastern Wisconsin by the time of European contact in the 1670s. They became allied with the Fox (Mesquakie) tribe in the 1730s and established themselves along the Mississippi River in southwestern Wisconsin, northwestern Illinois, and eastern Iowa prior to their removal to reservation lands west of the Mississippi in the 1830s. The Sauk currently maintain tribal headquarters in Oklahoma and Kansas.

a member of the Algonquian people formerly living in Wisconsin in the Fox River valley and on the shores of Green Bay