Duncan Mackay (born 26 July 1950) is a British composer, singer, arranger, and keyboard player who has recorded eight solo albums as well as collaborations. He was born in Leeds, Yorkshire, England.
He played with Steve Harley & Cockney Rebel from 1974 to 1977 and 10cc from 1978 to 1981, and also played on Kate Bush's first three albums, The Kick Inside, Lionheart (both 1978) and Never for Ever (1980), as well as Camel's albums Nude (1981) and The Single Factor (1982), and Budgie's 1982 album Deliver Us from Evil.