John George Turnbull is an English pop and rock guitarist and singer. He is currently a member of The Blockheads.

He has played in various bands, including Skip Bifferty, The Chosen Few, Arc, Loving Awareness, Glencoe, Nick Lowe, Dave Stewart and the Spiritual Cowboys, Eurythmics, Talk Talk, Londonbeat, Paul Young, Bob Geldof, World Party, Kaos Band and Ian Dury and the Blockheads.