4,530,000 (1994 census). 25,500,000 all Oromo speakers in Ethiopia (2007 census).
Oromia region: northern Bale, East Hararghe, and West Hararghe zones; Somali region: Shinile zone, and southernmost Afar region; Dire Dawa and Harari regions.
Latin script [Latn].
In Ethiopia, Oromo is viewed as one people who speak one language. Muslim.