1979-80 Thunder Bay Junior Hockey League champion: Port Arthur North Stars
| TEAM | GP | W | L | T | PTS |
| DeGagne Buccaneers | 34 | 24 | 10 | 0 | 48 |
| Port Arthur North Stars | 34 | 20 | 14 | 0 | 40 |
| Nip-Rock Rangers | 36 | 8 | 28 | 0 | 16 |
TBJHL Final
DeGagne Buccaneers vs. Port Arthur North Stars
Game 1: Buccaneers 7 North Stars 7 (OT)
Game 2: North Stars 7 Buccaneers 1
Game 3: North Stars 6 Buccaneers 3
Game 4: North Stars 9 Buccaneers 8 (OT)
Game 5: North Stars 12 Buccaneers 9
North Stars win eight-point series 9-1
Eastern Ontario playdowns
Semifinal
Port Arthur North Stars vs. North York Rangers
Game 1: Rangers 5 @ North Stars 3
Game 2: Rangers 6 North Stars 2
Game 3: Rangers 9 North Stars 2
Game 4: Rangers 16 North Stars 7
North York wins best-of-seven series 4-0
NOTE: North York defeated the Joliette Cyclones four games to two in the eastern final, then swept the Abbotsford Flyers in four straight to win the 1980 Centennial Cup.
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