The 2004–05 OPJHL season is the 12th season of the Ontario Provincial Junior A Hockey League (OPJHL). The thirty-five teams of the North, South, East, and West divisions competed in a 49-game schedule.

Come February, the top eight teams of each division competed for the Frank L. Buckland Trophy, the OJHL championship. The winner of the Buckland Cup, the St. Michael's Buzzers, competed in the Central Canadian Junior "A" championship, the Dudley Hewitt Cup, and finished 2nd. The DHC was hosted and won by the Georgetown Raiders who moved to the 2005 Royal Bank Cup but lost in the semi-final.

2004–05 OPJHL season

Changes

Huntsville Wildcats are reformed and changed their name to Huntsville-Muskoka Otters. Thornhill Rattlers change name to Thornhill Thunderbirds.

2004–05 OPJHL season

Final standings

Note: GP = Games played; W = Wins; L = Losses; OTL = Overtime losses; SL = Shootout losses; GF = Goals for; GA = Goals against; PTS = Points; x = clinched playoff berth; y = clinched division title; z = clinched conference title

2004–05 OPJHL season

Teams listed on the official league website.

Standings listed by Pointstreak on official league website.

2004-05 Frank L. Buckland Trophy Playoffs

Divisional Quarter-final

Port Hope Predators defeated Lindsay Muskies 4-games-to-none

Wellington Dukes defeated Peterborough Stars 4-games-to-none

Trenton Sting defeated Bowmanville Eagles 4-games-to-2

Kingston Voyageurs defeated Cobourg Cougars 4-games-to-none

Aurora Tigers defeated Syracuse Jr. Crunch 4-games-to-1

Newmarket Hurricanes defeated Streetsville Derbys 4-games-to-none

Stouffville Spirit defeated Couchiching Terriers 4-games-to-2

Huntsville-Muskoka Otters defeated Collingwood Blues 4-games-to-1

Georgetown Raiders defeated Mississauga Chargers 4-games-to-none

Oakville Blades defeated Buffalo Jr. Sabres 4-games-to-none

Hamilton Red Wings defeated Brampton Capitals 4-games-to-3

Milton Icehawks defeated Burlington Cougars 4-games-to-1

Wexford Raiders defeated Oshawa Legionaires 4-games-to-none

St. Michael's Buzzers defeated Thornhill Thunderbirds 4-games-to-none

North York Rangers defeated Vaughan Vipers 4-games-to-none

Markham Waxers defeated Pickering Panthers 4-games-to-2

Divisional Semi-final

Port Hope Predators defeated Trenton Sting 4-games-to-none

Wellington Dukes defeated Kingston Voyageurs 4-games-to-1

Aurora Tigers defeated Huntsville-Muskoka Otters 4-games-to-2

Newmarket Hurricanes defeated Stouffville Spirit 4-games-to-2

Georgetown Raiders defeated Milton Icehawks 4-games-to-1

Oakville Blades defeated Hamilton Red Wings 4-games-to-1

Wexford Raiders defeated Markham Waxers 4-games-to-1

St. Michael's Buzzers defeated North York Rangers 4-games-to-1

Divisional Final

Port Hope Predators defeated Wellington Dukes 4-games-to-1

Aurora Tigers defeated Newmarket Hurricanes 4-games-to-2

Georgetown Raiders defeated Oakville Blades 4-games-to-1

St. Michael's Buzzers defeated Wexford Raiders 4-games-to-1

Semi-final

St. Michael's Buzzers defeated Port Hope Predators 4-games-to-2

Georgetown Raiders defeated Aurora Tigers 4-games-to-3

Final

St. Michael's Buzzers defeated Georgetown Raiders 4-games-to-2

Dudley Hewitt Cup Championship

Hosted by Georgetown Raiders in Georgetown, Ontario. Georgetown won the event, St. Michael's finished second.

Round Robin

Fort William North Stars (SIJHL) defeated St. Michael's Buzzers 6-4

Georgetown Raiders defeated North Bay Skyhawks (NOJHL) 7-2

St. Michael's Buzzers defeated North Bay Skyhawks (NOJHL) 4-3 (4OT) Georgetown Raiders defeated Fort William North Stars (SIJHL) 4-0 Georgetown Raiders defeated St. Michael's Buzzers 5-4 Semi-final St. Michael's Buzzers defeated Fort William North Stars (SIJHL) 6-2 Final Georgetown Raiders defeated St. Michael's Buzzers 3-1

2005 Royal Bank Cup Championship

Hosted by Weyburn Red Wings in Weyburn, Saskatchewan. Georgetown finished in the semi-final.

Round Robin

Weyburn Red Wings (SJHL) defeated Georgetown Raiders 4-3

Georgetown Raiders defeated Hawkesbury Hawks (CJHL) 3-0

Georgetown Raiders defeated Portage Terriers (MJHL) 6-3

Camrose Kodiaks (AJHL) defeated Georgetown Raiders 2-1

Semi-final

Camrose Kodiaks (AJHL) defeated Georgetown Raiders 8-2

Awards and honours

Scoring leaders

Note: GP = Games played; G = Goals; A = Assists; Pts = Points; PIM = Penalty minutes