These are the 1958-59 playoffs for the Ontario Hockey Association's Senior B championship:
Participating teams were determined in the 1958-59 OHA Senior B Season.
Final[]
Best of 7
- Strathroy 5 Welland-Crowland 0
- Welland-Crowland 5 Strathroy 4
- Strathroy 10 Welland-Crowland 3
- Strathroy 10 Welland-Crowland 9
- Strathroy 6 Welland-Crowland 2
Strathroy Rockets beat Welland-Crowland Combines 4 wins to 1.