130,000 in Chad (2006). Population total all countries: 233,000.
Mayo-Kebbi Est Region, Mayo-Boneye department, Bongor subprefecture, along Logone river. Also in Cameroon.
Bongor, Bugudum (Budugum), Domo, Gizay (Gisey, Guissey), Gumay (Goumaye), Ham, Walia (Walya), Wina (Viri), Yagwa (Yagoua). All dialects understand Yagoua dialect well; Gizay and Yagoua dialects are 80% mutually intelligible. Lexical similarity: 97% between the Budugum dialect and the most similar other dialect.
Traditional religion, Christian, Muslim.