Giorgio Mariuzzo (born 14 July 1939) is an Italian screenwriter and director.
Born in Venice, Mariuzzo entered the cinema industry in 1968 as an assistant director, then since the mid-1970s he started writing screenplays and also directed a number of films. Best known for his collaboration with Lucio Fulci in the early 1980s, from 1985 he has been mainly active on television.