1942-43 Thunder Bay Senior Playoffs

Final
Best of 3

Port Arthur Bearcats beat Port Arthur Shipbuilders 2 wins to 1.

Independent team
Lakehead Army-Navy

''Note: This team was set up from the Army and Navy teams that played in a local military league. The Air Force could not get enough players to form a team.''

Regional Final
Best of 5

Port Arthur Bearcats beat Lakehead Army-Navy 3 wins to none.

Port Arthur Bearcats advanced to the 1942-43 Western Canada Allan Cup Playoffs.