No known L1 speakers. Ethnic population: 1,150 (Golla 2007).
Formerly north central Oklahoma; northeast Kansas, Iowa Reservation.
Iowa (Baxoje, Ioway), Niutaji (Missouri, Missouria, Nyut’chi), Oto (Chiwere, Jiwele, Jiwere, Otoe).
In 1999, only 4 passive speakers remain, none fluent (Golla 2007).
Last fluent speakers of Iowa and Oto died in 1996. Others have some knowledge of the language (1997 J. GoodTracks). Iowa and Oto were 1 language, with some family variations cross-cutting tribal affiliations. Missouri dialect has been extinct for many years. Language preservation activities taking place in Oklahoma.