The 2004–05 OHL season was the 25th season of the Ontario Hockey League. The OHL inaugurated two awards for scholastic achievement, the Roger Neilson Memorial Award and the Ivan Tennant Memorial Award. Twenty teams each played 68 games. The London Knights set a Canadian Hockey League record, being undefeated in 31 games. On March 11, 2005, the league announced OHL Live Stream, a new streaming service to be developed over a three year period. The J. Ross Robertson Cup was won by the London Knights, defeating the Ottawa 67's.