| Tournament details | |
|---|---|
| Venue(s) | Brandon, Manitoba Winnipeg, Manitoba |
| Dates | May 1973 |
| Teams | 2 |
| Final positions | |
Champions  | Portage Terriers (1st title) |
Runner-up  | Pembroke Lumber Kings |
| Tournament statistics | |
| Games played | 5 |
The 1973 Centennial Cup is the third Tier II Junior "A" 1973 ice hockey National Championship for the Canadian Junior A Hockey League.
The Centennial Cup was competed for by the winners of the Western Canadian Champions and the Eastern Canadian Champions.
The finals were hosted by the Portage la Prairie Terriers in the city of Brandon, Manitoba and Winnipeg Arena.