Andrew Mackay (born 23 July 1946) is an English musician, best known as a founding member (playing oboe and saxophone) of the art rock group Roxy Music.

In addition, he has taught music and provided scores for television, while his work as a session musician encompasses some of the most noteworthy and recognisable names in the music business.

Mackay was born on 23 July 1946 in Lostwithiel, Cornwall, England, and grew up in central London, attending Westminster City School where he was a chorister in the choir of St Margaret's, Westminster. A classically trained woodwind player, he studied music and English literature at the University of Reading. While at university, he played with a band called the Nova Express and, together with future Roxy Music publicist Simon Puxley, formed part of a performance art group called Sunshine. He also struck up a friendship with Winchester art student Brian Eno.

In January 1971, Mackay became a member of the art rock band Roxy Music (formed November 1970) after answering a Melody Maker advertisement placed by singer Bryan Ferry; he soon brought Eno into the group to handle "Synthesiser and Tapes". Prior to signing with E.G. Management, Mackay taught music full-time at Holland Park School and part-time at Bishop Thomas Grant Catholic Comprehensive to support himself.

He played oboe and saxophone in Roxy Music, becoming known for his Chuck Berry-inspired duckwalk during saxophone solos, notably on the raucous track "Editions of You". With his pronounced quiff, Star Trek sideburns and outlandish Motown-inspired stage costumes, Mackay made a vital contribution to the unique Roxy Music "look"—much of which functioned as a retro-futurist throwback to 1950s rock-and-roll performers.

His songwriting credits for Roxy Music include the Top Five hits "Love Is the Drug" (1975) and "Angel Eyes" (1979), plus "A Song for Europe", "Three and Nine", "Bitter-Sweet", "Sentimental Fool", "While My Heart is Still Beating" and "Tara", together with the early experimental B-sides "The Numberer" and "The Pride and the Pain".

He released two instrumental solo studio albums in the 1970s: In Search of Eddie Riff (1974), an exploration of his musical roots, and Resolving Contradictions (1978), based on his impressions of a trip to China. Both albums featured guest appearances from Paul Thompson (drums) and Phil Manzanera (guitar) of Roxy Music. He also composed and produced the music for the hit television series Rock Follies and Rock Follies of '77, with lyrics by playwright and screenwriter Howard Schuman. Both series sired specially recorded soundtrack albums, the first of which reached number one in the UK Album Chart in March/April 1976. The second contained the single "OK?", which reached number ten on the UK Singles Chart in May/June 1977. Schuman and Mackay reunited in 1983 for the BBC one-off TV drama Video Stars, with Mackay again providing music. He appeared onscreen in cameo roles in both Schuman projects.

Mackay has also worked with Duran Duran, Mott the Hoople, John Cale, Pavlov's Dog, John Mellencamp, Mickey Jupp, Yukihiro Takahashi, Paul McCartney, Godley & Creme, Eddie and the Hot Rods, Tomoyasu Hotei, Arcadia and 801. He played saxophone on several tracks of Brian Eno's albums Here Come the Warm Jets and Taking Tiger Mountain (By Strategy), both released in 1974.