1957-58 Eastern Canada Memorial Cup Playoffs

Champions

 * Ontario: Toronto Marlboros
 * Ottawa: Buckingham Beavers
 * Independent: Ottawa-Hull Canadiens
 * Maritimes: Cape Breton All Stars

Quarter Final
Best of 5

Cape Breton All Stars beat Buckingham Beavers 3 wins to 2.

Semi Final
Best of 5

Series awarded to Ottawa-Hull

Ottawa-Hull Canadiens beat Cape Breton All Stars.

Final
Best of 7

Ottawa-Hull Canadiens beat Toronto Marlboros 4 wins to 1.

Ottawa-Hull Canadiens advanced to the 1957-58 Memorial Cup Final.