521,000 (2014 census), increasing. Census based on tribal affiliation. 421,000 Basaamia and 99,900 Bagwe (2014 census). Total users in all countries: 646,000.
Busia, Namayingo, and Bugiri districts; near Kenya border, Lake Victoria is southern boundary.
Latin script [Latn], used since 1904.
Part of Luyia macrolanguage. Christian, traditional religion.