The Lahu (Ladhulsi or Kawzhawd; La H?) are an ethnic group of Southeast Asia and China.

They are one of the 56 ethnic groups officially recognized by the People's Republic of China; where about 450;000 live in Yunnan province. An estimated 150;000 live in Burma. In Thailand; Lahu are one of the six main hill tribes; their population is estimated at around 100;000. The Tai often refer to them by the exonym 'Mussur' or hunter. About 10;000 live in Laos. They are one of 54 ethnic groups in Vietnam; where about 1;500 live in Lai Chau province.

The Lahu divide themselves into a number of subgroups; such as the Lahu Na (Black Lahu); Lahu Nyi (Red Lahu); Lahu Hpu (White Lahu); Lahu Shi (Yellow Lahu) and the Lahu Shehleh. Where a subgroup name refers to a color; it refers to the traditional color of their dress.