OTO

North American Indian people of the Chiwere branch (including the Missouri and Iowa) of the Siouan linguistic family. In their historic past the Oto, together with the Iowa and the Missouri, separated from the Winnebago and moved southwest. In 1673, when met by the Jacques Marquette expedition, they were some distance up the Des Moines River in present-day Iowa. By 1804 they were living near the mouth of the Platte River. In 1830 they ceded all their land in Missouri and Iowa to the United States and ultimately sold off their remaining land in Kansas and Nebraska. In 1882 they were removed to Indian Territory (present-day Oklahoma). In the late 20th century several hundred of them were reported in Oklahoma, most of them of mixed blood.