614,000 in Laos (2005 census). Total users in all countries: 703,500.
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).