Lutz Wanja (born 6 June 1956) is a retired German backstroke swimmer who won a bronze medal at the 1973 World Aquatics Championships. He also won three medals at LEN European Aquatics Championships in 1974 and 1977. He competed at the 1972 and 1976 Summer Olympics in the 100 m and 200 m backstroke with the best achievement of fifth place in the 100 m backstroke in 1976. After retirement, Wanja worked as a swimming coach and was involved in the East German doping program. In particular, Jörg Hoffmann admitted in 1988 that Wanja gave him the anabolic steroid Oral-Turinabol.