The 2004 Memorial Cup occurred May 15–23 at Prospera Place in Kelowna, British Columbia. It was the 86th annual Memorial Cup competition and determined the major junior ice hockey champion of the Canadian Hockey League (CHL). It featured the host team, the Kelowna Rockets as well as the winners of the Ontario Hockey League, Quebec Major Junior Hockey League and the Western Hockey League which were the Guelph Storm, Gatineau Olympiques and the Medicine Hat Tigers respectively. The Kelowna Rockets would be the eventual winners, and would become only the fourth host team to win without winning their league as well. Kelowna defeated the Olympiques who made their second straight Memorial Cup final, but as with 2003, the 'Piques came up short. Kelowna also participated in the 2003 tournament as WHL champions but did not advance to the final, and would participate as WHL champions in the 2005 Memorial Cup as well.

Kelowna is a city on Okanagan Lake in the Okanagan Valley in the southern interior of British Columbia, Canada. It serves as the head office of the Regional District of Central Okanagan. The name Kelowna derives from the Okanagan word kiʔláwnaʔ, referring to a grizzly bear.