| Lê Hiển Tông 黎顯宗 | |
| Emperor of Đại Việt | |
| Full Name: | Lê Duy Diêu (黎維祧) |
| Succession: | Emperor of the Revival Lê dynasty |
| Reign: | 1740–1786 |
| Father: | Lê Thuần Tông |
| Mother: | Nhu Thuận hoàng hậu |
| Predecessor: | Lê Ý Tông |
| Successor: | Lê Chiêu Thống |
| House: | Revival Lê dynasty |
| Era Name: | Cảnh Hưng (景興) |
| Era Dates: | 1740–1786 |
| Temple Name: | Hiển Tông (顯宗) |
| Posthumous Name: | Vĩnh Hoàng đế (永皇帝) |
| Birth Date: | 20 May 1717 |
| Birth Place: | Đông Kinh, Đại Việt |
| Death Date: | 10 August 1786 |
| Death Place: | Đông Kinh, Đại Việt |
Lê Hiển Tông (黎顯宗 20 May 1717 – 10 August 1786), born Lê Duy Diêu, was the penultimate emperor of Vietnamese Lê dynasty. He reigned from 1740 to 1786 and was succeeded by his grandson Lê Duy Kỳ.[1] [2] [3]
At the time Vietnam was under the power of the Trịnh lords. During the reigns of Lê Thuần Tông (1732–35) and Lê Ý Tông (1735–40), Trịnh Giang ruled Vietnam with the title Uy Nam Vương, but he was deposed in 1740 due to poor leadership. From 1740 to 1767, Trịnh Doanh ruled with the title Minh Do Vương in the first part of the reign of Lê Hiển Tông. He was followed by Trịnh Sâm, who ruled from 1767 to 1782 with the title Tinh Do Vương. At this point the Lê dynasty began to regain its power.
He had twenty-three children, including: