Best of 7
- Port Arthur beat Fort William
- Port Arthur 4 Fort William 1
- Port Arthur 2 Fort William 1
- Port Arthur 5 Fort William 3
Port Arthur Bearcats beat Fort William Beavers 4 wins to none.
Port Arthur Bearcats advanced to the 1958-59 Western Canada Allan Cup Playoffs.
See also List of Thunder Bay Senior Playoffs
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