Malcolm Mitchell Young (born January 6 1953) is an Australian guitarist, best known as a founding member, rhythm guitarist, backing vocalist and co-songwriter for the Australian hard rock band, AC/DC. He has been with them since he founded the band in November 1973.

Though his younger brother Angus is the more visible of the brothers, Malcolm has been described as the business and brains behind AC/DC. As the rhythm guitarist, he is responsible for the broad sweep of AC/DC's sound, and co-writer of the material who has developed many of the band's well-known riffs. But behind the scenes, his word is said to be 'law' on matters such as organising when and where the band go on tour, whether to make an album or film soundtrack, and when to meet the media.