The 1957-58 Ottawa District Intermediate Playoffs were won by Ottawa CTC. They advanced to the Ottawa District Senior-Intermediate Final where they lost Senior Playoff champion Hull Legion two games to one.
Semifinal[]
- Ottawa CTC - Courtaulds Flyers 2:1 on series (4:3, 4:7, 6:2)
Final[]
- Ottawa CTC - Renfrew Royals 2:1 on series (2:3, 9:6, 3:0)
Senior-Intermediate Final[]
Best of 3
- Ottawa 7 Hull 3
- Hull 5 Ottawa 3
- Hull 4 Ottawa 2
Hull Legion beat Ottawa CTC 2 games to 1.
Hull Legion advanced to the 1957-58 Eastern Canada Allan Cup Playoffs.