1942-43 Quebec Junior Playoffs

League Champions

 * Junior Amateur Hockey Association: Montreal Junior Canadiens
 * Mount Royal Junior League: Town of Mount Royal
 * Eastern Townships Junior League: Bromptonville
 * Western Junior League: Valleyfield Canadiens
 * Quebec City Junior League: Quebec Aces
 * Shawinigan Junior League: Shawinigan Falls Immaculate Conception College
 * Chicoutimi-Lac St. Jean League: Arvida

First Round
Sudden death

Quarter Finals
2 games total goals

Shawinigan Falls Immaculate Conception College beat Quebec Aces 8 goals to 4.

Second game cancelled.

Town of Mount Royal beat Bromptonville 8 goals to 3.

Semi Finals
2 games total goals

Second game cancelled.

Montreal Junior Canadiens beat Valleyfield Canadiens 15 goals to 3.

Town of Mount Royal beat Shawinigan Falls Immaculate Conception College 11 goals to 4.

Final
2 games total goals

Second game conceded.

Montreal Junior Canadiens beat Town of Mount Royal 6 goals to 1.

Montreal Junior Canadiens advanced to the 1942-43 Eastern Canada Memorial Cup Playoffs.