1972-73 Eastern Canada Allan Cup Playoffs

These playoffs determined the Eastern Canadian finalist in the 1973 Allan Cup final.

Champions

 * Northern Ontario: Thunder Bay Twins
 * Ontario: Orillia Terriers
 * Newfoundland and Labrador: St. John's Capitals

Semi Final
Best of 5


 * Thunder Bay 6 St. John's 4
 * St. John's 6 Thunder Bay 3
 * Thunder Bay 6 St. John's 4
 * Thunder Bay 6 St. John's 4

Thunder Bay Twins beat St. John's Capitals 3 wins to 1.

Final
Best of 5


 * Orillia 8 Thunder Bay 2
 * Thunder Bay 7 Orillia 5
 * Thunder Bay 3 Orillia 1
 * Orillia 4 Thunder Bay 2
 * Orillia 7 Thunder Bay 0

Orillia Terriers beat Thunder Bay Twins 3 wins to 2.

Orillia Terriers advanced to the 1973 Allan Cup Final.