708,000 (2015 census). Total users in all countries: 797,500.
Scattered in the north.
Yuan, Khroong (Krong, Kroong), Luang Prabang, Sayabury, Cwaa (Lii, Lyy), Rok, U (Eastern Khmu, Uu), Hat. Dialects are grouped into three: Northern Khmu (Cwaa and Yuan), Western Khmu (Khroong and Rok), and Eastern Khmu (Svantesson and Holmer 2015).
Vigorous. All ages. Mixed attitudes. Many also use Lao [lao], especially under the age of 40.