ISO 639-3: iow
||Formerly north central Oklahoma; northeast Kansas, Iowa Reservation.
||Iowa (Baxoje, Ioway), Oto (Jiwere, Otoe, Jiwele, Chiwere), Niutaji (Nyut’chi, Missouri, Missouria).
||Siouan, Siouan Proper, Central, Mississippi Valley, Chiwere
||Iowa and Oto were one language, with some family variations cross-cutting the tribal affiliations. Missouri dialect has been extinct for many years.
||Last fluent speakers of Iowa and Oto died in 1996. Others have some knowledge of the language (1997 Jimm G. GoodTracks).