Marco Arturo Marelli (born 21 August 1949) is a Swiss set designer and stage director who has worked at European opera houses for opera and ballet. He designed sets for ballets by John Neumeier, and for premieres of the operas Thomas Chatterton by Matthias Pintscher at the Semperoper in Dresden (1998) and Medea by Aribert Reimann at the Vienna State Opera (2010).