John Martyn (born Iain David McGeachy on September 11, 1948 in New Malden, Surrey, England) is a british singer-songwriter and guitarist. He grew up in Glasgow and attended Shawlands Academy.

John Martyn moved to London from Edinburgh in the mid 1960s. He made his initial recorded impact in 1967, at the age of 19, with his debut album London Conversation. Since then he has become an integral part of the British music scene, incorporating folk, blues, jazz and even reggae into his unique sound.

In the late 60s to early 70s he was close friends with Nick Drake, to whom he wrote the song Solid Air. The album of the same name (Solid Air) was released only months before Drake's death, and remains an extremely moving album, as does his later album Grace and Danger which documents his divorce from his wife Beverley with whom he recorded several albums.

During the 70s John lived in Hastings on the South Coast of England. Whilst in Hastings he released, amongst others, the Live In Leeds double album which he sold from his own house.
Also during his time in Hastings John tried to help Paul Kossoff put his life back together.

A long held alcohol problem hasn't prevented Martyn from releasing twenty-two albums. In 2003 he contracted an infection that resulted in the amputation of part of a leg, an episode documented in the 2004 BBC documentary "Johnny Too Bad". He recovered, however, and continues to play, record and tour. In 2008, he was presented with the Lifetime Achievement Award at the BBC Folk Awards. He has influenced many songwriters and guitarists and is an artist whose stature only grows with time.