Quốc Oai is a

district A district is a type of administrative division that in some countries is managed by the local government. Across the world, areas known as "districts" vary greatly in size, spanning regions or county, counties, several municipality, municip ...

(''huyện'') of

Hanoi Hanoi ( ; ; ) is the Capital city, capital and List of cities in Vietnam, second-most populous city of Vietnam. The name "Hanoi" translates to "inside the river" (Hanoi is bordered by the Red River (Asia), Red and Black River (Asia), Black Riv ...

in the

Red River Delta The Red River Delta or Hong River Delta () is the flat low-lying plain formed by the Red River and its distributaries merging with the Thái Bình River in Northern Vietnam. ''Hồng'' (紅) is a Sino-Vietnamese word for "red" or "crimson". T ...

region of

Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...

. Quốc Oai district is bordered by Hoài Đức district to the east,

Hòa Bình province Hòa Bình or Hoà Bình (see tone marks) was a former mountainous province of Vietnam, located in the nation's Northwest region. It borders Phú Thọ province and Sơn La province to the northwest, Hanoi to the northeast, Hà Nam province to ...

to the west, Chương Mỹ district to the south,

Thạch Thất district Thạch Thất is a district (''huyện'') of Hanoi in the Red River Delta region of Vietnam. Geography Thạch Thất district is bordered by Phúc Thọ district to the east and north, Hòa Bình province to the west, Sơn Tây ''Toxicoden ...

and

Phúc Thọ district Phúc Thọ is a district of Hanoi, formerly of Hà Tây province, in the Red River Delta region of Vietnam. Geography Phúc Thọ rural district is bordered by Đan Phượng district to the east, Sơn Tây town to the west, Thạch Thất dist ...

to the north. The district is subdivided to 21 commune-level subdivisions, including the township of Quốc Oai (district capital) and the rural communes of Cấn Hữu, Cộng Hòa, Đại Thành, Đồng Quang, Đông Xuân, Đông Yên, Hòa Thạch, Liệp Tuyết, Nghĩa Hương, Ngọc Liệp, Ngọc Mỹ, Phú Cát, Phú Mãn, Phượng Cách, Sài Sơn, Tân Hòa, Tân Phú, Thạch Thán, Tuyết Nghĩa, Yên Sơn.

Culture

Thầy Pagoda rests at the foot of Sài Sơn Mountain, Quốc Oai District. Along with Tây Phương Pagoda, Hương Temple, they are the most sacred religious sites in the outskirts of Hanoi. Established in the 11th century during the

Lý dynasty The Lý dynasty (, , chữ Nôm: 茹李, chữ Hán: 朝李, Vietnamese language, Vietnamese: ''triều Lý''), officially Đại Cồ Việt (chữ Hán: 大瞿越) from 1009 to 1054 and Đại Việt (chữ Hán: 大越) from 1054 to 1225, was ...

, Thầy Pagoda is closely associated with Zen Master

Từ Đạo Hạnh Từ Đạo Hạnh (chữ Hán: , 1072-1116) also Đức Thánh Láng (德聖𣼽), was a Vietnamese monk who lived at the Thầy Temple near modern Hanoi Hanoi ( ; ; ) is the Capital city, capital and List of cities in Vietnam, second-most ...

, a revered monk known for his spiritual teachings and contributions to Vietnamese Buddhism. Districts of Hanoi {{Hanoi-geo-stub