Sanxingdui (Chinese: 三星堆; pinyin: Sānxīngduī; lit. 'Three Star Mound') is an archaeological site and a major Bronze Age culture in modern Guanghan, Sichuan, China. Largely discovered in 1986, following a preliminary finding in 1927, archaeologists excavated artifacts that radiocarbon dating placed in the twelfth–eleventh centuries BC. The archaeological site is the type site for the Sanxingdui culture that produced these artifacts, archeologists have identified the locale with the ancient kingdom of Shu. The artifacts are displayed in the Sanxingdui Museum located near the city of Guanghan.

Sanxingdui is on the UNESCO list of tentative World Heritage Sites, along with the Jinsha site and the tombs of boat-shaped coffins.