1958-59 OHA Junior A Season

This is the 1958-59 season of the Ontario Hockey Association's Junior A series:

Quarter Finals
Best of 7

Peterborough Petes beat Barrie Flyers 4 wins to 2.

Guelph Biltmores beat Toronto Marlboros 4 wins to 1.

Semi Finals
Best of 7

St Michaels Majors beat St Catharines TeePees 4 wins to 2, 1 tie.

Peterborough Petes beat Guelph Biltmores 3 wins to none, 2 ties.

Final
Best of 7

Peterborough Petes beat St Michaels Majors 3 wins to 2, 3 ties.

Peterborough Petes advanced to the 1958-59 Eastern Canada Memorial Cup Playoffs.