| Tournament details | |
|---|---|
| Venue(s) | Montreal Forum (Montreal, Quebec) |
| Dates | May 7–12, 1973 |
| Teams | 3 |
| Final positions | |
| Champions | Toronto Marlboros (OHA) (6th title) |
The 1973 Memorial Cup occurred May 7–12 at the Montreal Forum in Montreal, Quebec. It was the 55th annual Memorial Cup competition, organized by the Canadian Amateur Hockey Association (CAHA) to determine the champion of major junior A ice hockey. Participating teams were the winners of the Ontario Hockey Association, Quebec Major Junior Hockey League and Western Hockey League which were the Toronto Marlboros, Quebec Remparts and Medicine Hat Tigers. Toronto won their 6th Memorial Cup, defeating Quebec in the final game.