| Lý Huệ Tông 李惠宗 | |
| Emperor of Đại Việt | |
| Father: | Lý Cao Tông |
| Mother: | Empress An Toàn |
| Spouse: | Trần Thị Dung |
| Issue: | Thuận Thiên (Trần dynasty empress) Princess Phật Kim as Lý Chiêu Hoàng |
| Birth Date: | July 1194 |
| Birth Place: | Thăng Long |
| Death Date: | 3 September 1226 (aged 31–32) |
| Death Place: | Chân Giáo pagoda, Thăng Long |
| Place Of Burial: | Thọ Tomb |
| Full Name: | Lý Sảm (李旵) or Lý Hạo Sảm(李昊旵) |
| Succession: | Emperor of the Lý dynasty |
| Reign: | 15/11/1210 - 3/9/1224 |
| Predecessor: | Lý Cao Tông |
| Successor: | Lý Chiêu Hoàng |
| Succession1: | Retired Emperor of the Lý dynasty |
| Reign1: | 1224 - 1226 |
| Predecessor1: | Sùng Hiền hầu |
| House: | Lý |
| Era Dates: | Kiến Gia (建嘉): 1210 – 10/1224 |
| Temple Name: | Huệ Tông (惠宗) |
| Regnal Name: | Tự Thiên Thống Ngự Khâm Nhân Hoành Hiếu Hoàng đế (資天統御欽仁宏孝皇帝) |
| Religion: | Buddhism |
Lý Huệ Tông (chữ Hán: 李惠宗; born Lý Sảm 李旵; July 1194 – 3 September 1226) was the emperor of Vietnam from 1211 to 1224, the penultimate leader of the Lý dynasty. During Lý Huệ Tông's rule, many members of the Trần family assumed key roles in the government, including Trần Thủ Độ. The Trần family later used its position of power to place a young Trần Cảnh (temple name Trần Thái Tông) on the throne to found the Trần dynasty.[1]
In 1224, Lý Huệ Tông became mentally ill, and the issue of succession became pressing. He had produced no male heirs, and so appointed his seven-year-old daughter Lý Chiêu Hoàng as his successor. Although a female ruler would likely not have been normally acceptable to the court, Trần Thủ Độ had a scheme to end the Lý dynasty and place a Trần on the throne which depended on the existence of a young empress, and so Lý Chiêu Hoàng was accepted as empress. Lý Huệ Tông retired to become a Buddhist monk, although he lived only two more years. In 1226 Trần Thủ Độ, while consolidating the power of the newly founded Trần dynasty by eliminating Lý family members and potential pretenders, induced Lý Huệ Tông to commit suicide.