1,630,000 in Viet Nam (2009 census).
Central and northeast, near China border, Cao Bang, Lang Son, Bac Giang, Bac Kan, Thai Nguyen, Ha Giang, Tuyen Quang, Yen Bai, and Hai Duong provinces, Bac Thai, Quang Ninh, Ha Bac; south in Lam Dong Province,Tung Nghia and Song Mao. Possibly in Laos.
Central Tày, Eastern Tày, Northern Tày, Southern Tày, Tày Bao Lac, Tày Trung Khanh, Thu Lao. Reportedly similar to Nung [nut].
Latin script [Latn].
Tày is an official ethnic community. Traditional religion, Christian.