The Tai Lü people (Chinese: 傣仂, Vietnamese: Người Lự) are an ethnic group of Vietnam, China, and Thailand. In Vietnam, most Lu live in Lai Châu Province, and their population was 4,964 in 1999. In China, they are officially recognized as part of the Dai ethnic group. They speak a Tai language.
Lu is the indigenous people in Mường Thanh (Land of the God to Thai people; Thai language: muong theng). They had built Tam Vạn wall in Mường Thanh and managed there for 19 generations before Hoàng Công Chất, a Thai leader, came.
The Lu give last name under their father's last name, and have the middle name Bạ (for males) and Ý (for females). Their religion is Buddhism. They sing khắp lự and play pí me luk ("mother-children" flute).