2004–05 OHL season

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.

Final standings
Note: DIV = Division; GP = Games played; W = Wins; L = Losses; T = Ties; OTL = Overtime losses; GF = Goals for; GA = Goals against; PTS = Points; x = clinched playoff berth; y = clinched division title; z = clinched conference title

First team

 * Jeff Carter, Centre, Sault Ste. Marie Greyhounds
 * Dylan Hunter, Left Wing, London Knights
 * Corey Perry, Right Wing, London Knights
 * Danny Syvret, Defence, London Knights
 * Andre Benoit, Defence, Kitchener Rangers
 * Michael Ouzas, Goaltender, Mississauga IceDogs
 * Dale Hunter, Coach, London Knights

Second team

 * Mike Richards, Centre, Kitchener Rangers
 * Benoit Pouliot, Left Wing, Sudbury Wolves
 * Bobby Ryan, Right Wing, Owen Sound Attack
 * Jordan Smith, Defence, Sault Ste. Marie Greyhounds
 * Kyle Quincey, Defence, Mississauga IceDogs
 * Adam Dennis, Goaltender, London Knights
 * Dick Todd, Coach, Peterborough Petes

Third team

 * Brad Richardson, Centre, Owen Sound Attack
 * Liam Reddox, Left Wing, Peterborough Petes
 * Ryan Callahan, Right Wing, Guelph Storm
 * Nathan McIver, Defence, Toronto St. Michael's Majors
 * Mark Flood, Defence, Peterborough Petes
 * Gerald Coleman, Goaltender, London Knights
 * Mike Stothers, Coach, Owen Sound Attack

CHL Canada/Russia Series
In the ADT Canada-Russia Challenge:
 * On November 25, the OHL All-stars defeated the Russian Selects 3–1 at Barrie, Ontario.
 * On November 28, the OHL All-stars defeated the Russian Selects 5–2 at Mississauga, Ontario.

After these two games, OHL had an all-time record of 4–0 against the Russian Selects since the tournament began in 2003–04.

London Knights' 2004–05 undefeated streak
In the 2004–05 season the London Knights broke an OHL record, going 28 games in a row without a loss (27–0–1). They subsequently broke the CHL record of 29 games (held by the 1978–79 Brandon Wheat Kings, who went 25–0–4 during their streak), with a 0–0 tie with the Guelph Storm on December 10, 2004, giving them a record of 28–0–2. The streak ended at 31 games after a 5–2 loss to the Sudbury Wolves on December 17.

* Tied OHL record previously set by Kitchener in 1983–84 ** Broke OHL record previously set by Kitchener in 1983–84 *** Tied CHL record previously set by Brandon in 1978–79 **** Broke CHL record previously set by Brandon in 1978–79

2005 OHL Priority Selection
On May 7, 2005, the OHL conducted the 2005 Ontario Hockey League Priority Selection. The Oshawa Generals held the first overall pick in the draft, and selected John Tavares from the Toronto Marlboros. Tavares was awarded the Jack Ferguson Award, awarded to the top pick in the draft.

Below are the players who were selected in the first round of the 2005 Ontario Hockey League Priority Selection.

2005 CHL Import Draft
On June 29, 2005, the Canadian Hockey League conducted the 2005 CHL Import Draft, in which teams in all three CHL leagues participate in. The Ottawa 67's held the first pick in the draft by a team in the OHL, and selected Jakub Vojta from the Czech Republic with their selection.

Below are the players who were selected in the first round by Ontario Hockey League teams in the 2005 CHL Import Draft.