The 1971-72 Eastern Canada Allan Cup Playoffs were won by the Barrie Flyers of the OHA Senior A Hockey League. They lost in the 1971-72 Allan Cup Final to the Spokane Jets of the Western International Hockey League four games to two.
Champions[]
- Northern Ontario: Sault Ste Marie Canadians
- Ontario: Barrie Flyers
- Newfoundland and Labrador: Grand Falls-Windsor Cataracts
Semifinals[]
- Barrie Flyers - Sault Ste Marie Canadians 3:1 on series (5:7, 9:2, 6:1, 5:3)
Final[]
- Barrie Flyers - Grand Falls-Windsor Cataracts 4:0 on series (3:2, 8:2, 5:1, 6:2)