David Cadieux (born November 25, 1974) is a Canadian professional boxer.

As an amateur, he won the silver medal at the 2002 Commonwealth Games.

As a professional boxer, on May 12, 2006, at the Aréna Jacques Plante, Cadieux won the Canadian belt stopping former Canuck champion Patrice L'Heureux at the very beginning of the 7th round by a powerful left hook on the side of the head dropping him down for the 4th and last time of the evening.

In 2007 he lost the national title to Raymond Olubowale by KO.