169,000 (2009 census).
San Chay mainly in Tuyen Quang, Lang Son, Bac Kan, and Thai Nguyen provinces; scattered in Yen Bai, Vinh Phuc, Phu Tho, Bac Giang, and Quang Ninh provinces.
None known. Maintain some features from Northern Tai [nod].
Sán Chay is an official ethnic community. Possibly came from China in the 19th century. May speak a form of Yue Chinese [yue]. Traditional religion.