Lê Thánh Tông (黎聖宗; 25 August 1442 – 3 March 1497), personal name Lê Hạo, temple name Thánh Tông, courtesy name Tư Thành, was an emperor of Đại Việt, reigning from 1460 to 1497, the fifth and the longest-reigning emperor of the Later Lê dynasty, and is widely praised as one of the greatest emperors in Vietnamese history. He came to power through a coup d'état against his second brother Lê Nghi Dân in 1460.
His reign is recognized for the extensive administrative, military, education, and fiscal reforms he instituted, conquests of Champa states and expansion of Đại Việt territory in the south, and a cultural revolution that replaced the old aristocracy with a generation of literati scholars. His reign was eulogized as the Prospered reign of Hồng Đức (Hồng Đức Thịnh trị; 洪德盛治).
Lê Thánh Tông is known by several names, including his birth name Lê Hạo (黎灝), his courtesy name Tư Thành (思誠), pseudonym Đạo Am chủ nhân (道庵主人), rhymed name Tao Đàn nguyên súy (騷壇元帥), formal title Thiên Nam động chủ (天南洞主).
Lê Tư Thành was born on the 20th of the 7th lunar month (August 25th in Gregorian calendar) in the third year of Đại Bảo (1442). A legend surrounding his birth is that, his mother Ngô Thị Ngọc Dao, was bestowed a Tiên đồng (仙童) by the Jade Emperor in her dream, and started to become pregnant with Tư Thành the following day. He was the fourth son of emperor Lê Thái Tông and his consort Ngô Thị Ngọc Dao. He was the fourth grandson of Lê Lợi, the half-brother of Lê Nhân Tông and it is likely that his mother and consort Nguyễn Thị Anh (the mother of Lê Nhân Tông) were related (cousins or perhaps sisters). Young Tư Thành was described in the national chronicle, the Complete Annals of the Great Viet as "Magnificiently gifted, his mind and body are marvelous, his looks elegantly strong; kind-hearted and generous, bright, earnest, truly the brilliant kind who deserves the title of Emperor, whose ingenuity and bravery will preserve the nation".