Graham Southern (born 21 September 1960) is an English art dealer and gallery owner. In 1994, Southern was the Founding Director of Christie's (London) Post-War & Contemporary Art Department which he ran until 2001, leaving to become a director of the Anthony d'Offay Gallery. In 2002, he founded Haunch of Venison gallery with Harry Blain. The gallery represented, amongst others, Turner Prize winners Richard Long and Keith Tyson.