614,000 in Laos (2005 census). Population total all countries: 704,000.
Scattered in the north. Also in China, France, Thailand, United States, Viet Nam.
Hat, Khroong (Krong), Luang Prabang, Lyy, Rok, Sayabury, U, Yuan. There are two subgroups of Khmu in China (Damaile and Damailao), which may differ in dialect.