1939-40 Thunder Bay Junior Playoffs

Final
Best of 5


 * Juniors 10 Columbus Club 5
 * Columbus Club 5 Juniors 3
 * Juniors 5 Columbus Club 4
 * Columbus Club 3 Juniors 1
 * Juniors 7 Columbus Club 4

Port Arthur Juniors beat Fort William Columbus Club 3 wins to 2.

Final
Best of 3

Fort Frances Shevlin Pines beat Fort Frances Knights of Columbus 2 wins to 1.

Regional final
Best of 3


 * Port Arthur 12 Fort Frances 3
 * Fort Frances defaulted.

Port Arthur Juniors beat Fort Frances Shevlin Pines Port Arthur Juniors advanced to the 1939-40 Western Canada Memorial Cup Playoffs.