1957-58 Western Canada Memorial Cup Playoffs

Champions

 * Alberta: Edmonton Oil Kings
 * Saskatchewan: Regina Pats
 * Manitoba: St Boniface Canadiens
 * Thunder Bay: Fort William Canadiens

Semi Finals
Best of 7

Regina Pats beat Edmonton Oil Kings 4 wins to none.

St Boniface Canadiens beat Fort William Canadiens 4 wins to 1.

Final
Best of 7

Regina Pats beat St Boniface Canadiens 4 wins to 2.

Regina Pats advanced to the 1957-58 Memorial Cup Final.