The 2003–04 OHL season was the 24th season of the Ontario Hockey League. In November 2003, the OHL Board of Governors renamed the OHL Humanitarian of the Year Award to the Dan Snyder Memorial Trophy, in recognition of former Owen Sound Platers player, Dan Snyder, who died in a car accident in September 2003. Twenty teams each played 68 games. The J. Ross Robertson Cup was won by the Guelph Storm, who swept the Mississauga IceDogs in the league final.