György Sándor Ligeti (Hungarian: Ligeti György Sándor [ˈliɡɛti ˈɟørɟ ˈʃaːndor]; 28 May 1923 – 12 June 2006) was a composer of contemporary classical music. He has been described as "one of the most important avant-garde composers in the latter half of the twentieth century" and "one of the most innovative and influential among progressive figures of his time".

Born in Transylvania, Romania, he lived in Hungary before emigrating and becoming an Austrian citizen.