The Manchus (; ) are a Tungusic East Asian ethnic group native to Manchuria in Northeast Asia. They are an officially recognized ethnic minority in China and the people from whom Manchuria derives its name. The Later Jin (1616–1636) and Qing (1636–1912) dynasties of China were established and ruled by the Manchus, who are descended from the Jurchen people who earlier established the Jin dynasty (1115–1234) in northern China.
Manchus form the largest branch of the Tungusic peoples and are distributed throughout China, forming the fourth largest ethnic group in the country. They can be found in 31 Chinese provincial regions. Among them, Liaoning has the largest population and Hebei, Heilongjiang, Jilin, Inner Mongolia and Beijing have over 100,000 Manchu residents. About half of the population live in Liaoning and one-fifth in Hebei. There are a number of Manchu autonomous counties in China, such as Xinbin, Xiuyan, Qinglong, Fengning, Yitong, Qingyuan, Weichang, Kuancheng, Benxi, Kuandian, Huanren, Fengcheng, Beizhen and over 300 Manchu towns and townships. Manchus are the largest minority group in China without an autonomous region.
"Manchu" () was adopted as the official name of the people by Emperor Hong Taiji in 1635, replacing the earlier name "Jurchen". It appears that manju was an old term for the Jianzhou Jurchens, although the etymology is not well understood.
The Jiu Manzhou Dang, archives of early 17th century documents, contains the earliest use of Manchu. However, the actual etymology of the ethnic name "Manju" is debatable. According to the Qing dynasty's official historical record, the Researches on Manchu Origins, the ethnic name came from Mañjuśrī. The Qianlong Emperor also supported the point of view and even wrote several poems on the subject.
Meng Sen, a scholar of the Qing dynasty, agreed. On the other hand, he thought the name Manchu might stem from Li Manzhu (李滿住), the chieftain of the Jianzhou Jurchens.
Another scholar, Chang Shan, thinks Manju is a compound word.