The 2003 Memorial Cup (branded as the 2003 Mastercard Memorial Cup for sponsorship reasons) occurred May 17–25 at the Colisée Pepsi in Quebec City, Quebec.

It featured the host team, the Quebec Remparts, as well as the winners of the Ontario Hockey League, Quebec Major Junior Hockey League and the Western Hockey League, which were the Kitchener Rangers, Hull Olympiques and the Kelowna Rockets respectively.

They beat the Hull Olympiques in the final, who were trying to win their first Memorial Cup since 1997 when they won it on home ice.

[1] Semi-final Final Andre Benoit, Jesse Boucher, Gregory Campbell, Mike Chmielewski, David Clarkson, Scott Dickie, Carlo DiRienzo, Nick Duff, T. J. Eason, Steve Eminger, Cam Fergus, Matt Grennier, George Halkidis, Thomas Harrison, Kevin Hurley, Petr Kanko, Adam Keefe, Matt Manias, Rafal Martynowski, Chad McCaffrey, Matt McCann, Paul McFarland, Evan McGrath, Nathan O'Nabigon, Mike Richards, Derek Roy (Captain), Marcus Smith.

Head Coach: Peter DeBoer All-star team