越池市
Ba Vì was consolidated basis of the old districts Bất Bạt, Tùng Thiện and Quảng Oai, Hà Tây province. From 1975 to 1978, Ba Vì district belonged to Hà Sơn Bình province, and from 1978 to 1991, it belonged to Hanoi city. In 1982, seven communes: Cổ Đông, Đường Lâm, Kim Sơn, Sơn Đông, Thanh Mỹ, Trung Sơn Trầm and Xuân Sơn, were managed by Sơn Tây town; and two communes: Tích Giang and Trạch Mỹ Lộc, were managed by Phúc Thọ district. In 1987, Quảng Oai town was established and belonged to Hà Tây from 1991 to 2008. In 1994, the town of Quảng Oai and Tây Đằng commune were consolidated to form Tây Đằng town. From August 1, 2008, Ba Vì became a district of Hanoi again. At the same time, Tân Đức moved to the management of Việt Trì city, Phú Thọ province.