The 2004 Allan Cup was the Canadian senior ice hockey championship for the 2003–04 senior "AAA" season. The event was hosted by the St-Georges Garaga in Saint-Georges, Quebec. The 2004 tournament marked the 96th year that the Allan Cup has been awarded.
Round Robin
Aylmer Blues 6 – Laval Chiefs 3
St-Georges Garaga 9 – Saint John Thundercats 3
Saint John Thundercats 2 – Bentley Generals 1
Laval Chiefs 2 – Ministikwan Islanders 1
Ministikwan Islanders 5 – Aylmer Blues 2
St-Georges Garaga 9 – Bentley Generals 3Quarter-final
Laval Chiefs 5 – Saint John Thundercats 3
Bentley Generals 5 – Aylmer Blues 2Semi-final
Ministikwan Islanders 7 – Laval Chiefs 1
St-Georges Garaga 7 – Bentley Generals 4Final
St-Georges Garaga 5 – Ministikwan Islanders 0