7,000 (Van Driem 2007).
Jharkhand state: southern Palamau, northern Ranchi, Gumla and Lohardaga districts of Chotanagpur Plateau; Chhattisgarh state: Raigarh district, Jashpur area; Maharashtra state; Odisha state: Sambalpur district; West Bengal state.
Brijia (Birjia, Koranti), Manjhi.
Devanagari script [Deva].
Asur and Birjia are Scheduled Tribes. Hindu, Christian, traditional religion.