Marc Duez (born 18 April 1957 in Verviers) is a racing and rally driver from Belgium.

Duez also has competed in the 24 Hours of Le Mans, scoring 4 class podiums, and the Andros Trophy.

For years now Marc Duez has been a representative for the RACB Archived 14 April 2012 at the Wayback Machine, the Royal Automobil Club of Belgium.

He strongly promotes the Driver's Academy and the Belgian Racing Circuits.

Also since 2009, Marc Duez has been racing for Fun Still Exists, also known as FSE.