Søren Wulff Johansson (born 26 August 1971 in Hals, Denmark) is a Danish former decathlete. He was the first Danish person to receive a lifetime ban from sport, after failing doping tests for anabolic steroids in 1989 and 1995.
Johansson was a two-time Danish Athletics Championships. He was the athletics pentathlon champion in 1994 and the decathlon champion in 1995. His personal best performance in the decathlon was 6982 points.
He was a member of several athletics clubs: Aalborg AK until 1989, Trongården in the 1991/1992 season, Sparta Athletics in 1993 and Copenhagen Idræts Forening 1994/1995.