Sioux language
| Sioux | |
|---|---|
| Dakota, Lakota | |
| Native to | United States, Canada |
| Region | Northern Nebraska, southern Minnesota, North Dakota, South Dakota, northeastern Montana; southern Manitoba, southern Saskatchewan |
| Ethnicity | Sioux |
| Speakers | ~13,100 (2021) |
Siouan
| |
| Dialects | |
| Official status | |
Official language in | United States South Dakota |
| Language codes | |
| ISO 639-2 | dak |
| ISO 639-3 | Either:dak – Dakotalkt – Lakota |
| Glottolog | dako1258 Dakotalako1247 Lakota |
| ELP | Sioux |
| Linguasphere | Dakota 62-AAC-a Dakota |
 Sioux is classified as Vulnerable by the UNESCO Atlas of the World's Languages in Danger | |
Sioux is a Siouan language spoken by approximately 13,000 Sioux people in the United States and Canada, making it the fifth most spoken Indigenous language in the United States or Canada, behind Navajo, Cree, Inuit languages, and Ojibwe.
Since 2019, "the language of the Great Sioux Nation, comprised of three dialects, Dakota, Lakota, and Nakota" is the official Indigenous language of South Dakota.