1945-46 Thunder Bay Senior Playoffs

8 game season

 * Port Arthur 7 Fort William 4
 * Fort William 8 Port Arthur 7
 * Port Arthur 6 Fort William 5
 * Fort William 6 Port Arthur 5
 * Fort William 5 Port Arthur 4
 * Fort William 9 Port Arthur 6
 * Port Arthur 3 Fort William 2
 * Port Arthur 7 Fort William 5

Final
Best of 5

Fort William Legion beat Port Arthur Bearcats 3 wins to none.

Independent team

 * Fort Frances Athletics (played in Northern Amateur League).

Regional Final
Best of 3

Fort William Legion beat Fort Frances Athletics 2 wins to none.

Fort William Legion advanced to the 1945-46 Western Canada Allan Cup Playoffs.