Aluminum Corporation of China Limited, also known as Chalco (SEHK: 2600, NYSE: ACH, SSE: 601600), is a multinational aluminium company headquartered in Beijing, People's Republic of China. It is the world’s second-largest alumina producer (and the only producer in China) and third-largest primary aluminium producer (and the largest producer in China).

Chinalco is principally engaged in the extraction of aluminium oxide, electrolyzation of virgin aluminium and the processing and production of aluminium.

Its primary listing is on the Shanghai Stock Exchange and it is a constituent of the SSE 50 index. It has secondary listings on the Hong Kong Stock Exchange and the New York Stock Exchange.

Aluminum Corporation of China (CHINALCO) is a state-backed holding company established to be the primary aluminium producer in the People's Republic of China in 2001. It is the parent company of Aluminum Corporation of China Limited (CHALCO) which is listed on the New York, Hong Kong and Shanghai stock exchanges.