1958-59 Eastern Canada Memorial Cup Playoffs

Champions

 * Ontario: Peterborough Petes
 * Ottawa: Pembroke Lumber Kings
 * Independent team: Ottawa-Hull Canadiens
 * Quebec: Quebec Baronets
 * Maritimes: Campbellton Tigers

First Round
Best of 3

Pembroke Lumber Kings beat Campbellton Tigers 2 wins to none.

Quarter Final
Best of 3

Quebec Baronets beat Pembroke Lumber Kings 2 wins to none.

Semi Final
Best of 3

Ottawa-Hull Canadiens beat Quebec Baronets 2 wins to none.

Final
Best of 7

Peterborough Petes beat Ottawa-Hull Canadiens 4 wins to 2, 1 tie.

Peterborough Petes advanced to the 1958-59 Memorial Cup Final.