John McKay is an English songwriter and guitarist. He was the first studio guitarist of Siouxsie and the Banshees. He was a member of the group from July 1977 until September 1979. He played a "jagged unorthodox chording", and created a "metal-shard roar" with his guitar. Q magazine included McKay's work on "Hong Kong Garden" in its list of the "100 Greatest Guitar Tracks Ever". He recorded two studio albums with the band, their debut album The Scream in 1978 and Join Hands in 1979.

Siouxsie and the Banshees were a British rock band formed in London in 1976 by vocalist Siouxsie Sioux and bass guitarist Steven Severin. They have been widely influential, both over their contemporaries and with later acts. The Times called the group "one of the most audacious and uncompromising musical adventurers of the post-punk era".