1930-31 Eastern Canada Memorial Cup Playoffs

Champions

 * Northern Ontario: Sault Ste. Marie Greyhounds
 * Ontario: Niagara Falls Cataracts
 * Ottawa: Ottawa Primrose
 * Quebec: Montreal AAA
 * Maritimes:Levin Fur Company (Do not participate)

Semi finals
2 games total goals

Niagara Falls Cataracts beat Sault Ste Marie Greyhounds 8 goals to 7.

Ottawa Primrose beat Montreal AAA 9 goals to 3.

Final
2 games total goals

Ottawa Primrose beat Niagara Falls Cataracts 5 goals to 2.

Ottawa Primrose advanced to the 1930-31 Memorial Cup Final.