Dave Gelly MBE (born 28 January 1938) is a British jazz critic. A long-standing contributor to The Observer, he was named Jazz Writer of the Year in the 1999 British Jazz Awards. Gelly is also a jazz saxophonist and broadcaster, presenting a number of shows for BBC Radio 2 including Night Owls for much of the 1980s.
He played with Art Themen and Lionel Grigson in the Cambridge University band, and from the mid-1960s co-led his own quartets and quintets with Frank Ricotti, with Jeff Scott, and with Barbara Thompson. He was also a member of the New Jazz Orchestra, directed by Neil Ardley, which also featured Ian Carr, Jon Hiseman, Barbara Thompson, Mike Gibbs, Don Rendell, and Trevor Tomkins.