These were the 1957-58 Northern Ontario Intermediate Playoffs:
Quarterfinals[]
Best of 5
- Sault Ste Marie Indians beat Blind River Athletics (15:4, 5:3, Blind River defaulted)
Best of 3
- Espanola Kayvees beat Sudbury Frontenacs (13:2, ?)
Semifinals[]
Best of 7
- Sault Ste Marie Indians beat Espanola Kayvees 4 wins to one (1:2, 5:4 OT, 3:1, 5:3, 12:4)
Best of 3
- Temiskaming Royals beat New Liskeard Flyers 2 wins to none (6:5 OT, 10:3)
Final[]
Best of 3
- Temiskaming Royals beat Sault Ste Marie Indians 2 wins to none (5:1, 8:1)