Lakota
The Lakota (also Lakhota, Teton, Titonwon) form one of a group of seven tribes (the Great Sioux Nation) and speak Lakota, one of the three major dialects of the Sioux language. The Lakota are the westernmost of the three Sioux groups, occupying lands in both North and South Dakota. The seven branches or "sub-tribes" of the Lakota are Brulé, Oglala, Sans Arcs, Hunkpapa, Miniconjou, Sihasapa and Two Kettles.

The Lakota are closely related to the western Dakota of Minnesota. After their adoption of the horse, suká-wakha ('dog [of] power/mystery/wonder') in the early 18th century, the Lakota became part of the Great Plains culture with their eventual Algonkin-speaking allies, the Tsitsistas (Northern Cheyenne), living in the northern Great Plains. Their society centered on the buffalo hunt with the horse. There were 20,000 Lakota in the mid-18th century. The number has now increased to about 70,000, of whom about 20,500 still speak the Lakota language.