| Tourney Name: | Manitoba Centennial Cup |
| Year: | 1973 |
| Size: | 140px |
| Dates: | May 1973 |
| Num Teams: | 2 |
| Venues: | Brandon, Manitoba Winnipeg, Manitoba |
| Type: | other |
| Winners: | Portage Terriers |
| Count: | 1 |
| Second: | Pembroke Lumber Kings |
| Games: | 5 |
| Prevseason: | 1972 |
| Nextseason: | 1974 |
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.
Prior to Regionals
Chatham Maroons (SOJHL) defeated Wexford Raiders (OPJHL) 4-games-to-3
Moncton Hawks (NBJHL) defeated Buchans Miners (NLJHL) 4-games-to-none
Pembroke Lumber Kings (CJHL) defeated St. Paul Vulcans (CAJHL) 4-games-to-1
| Game | Team | Score | Team | Score | |
|---|---|---|---|---|---|
| 1 | Portage la Prairie Terriers | 6 | Pembroke Lumber Kings | 5 OT | |
| 2 | Portage la Prairie Terriers | 4 | Pembroke Lumber Kings | 2 | |
| 3 | Portage la Prairie Terriers | 3 | Pembroke Lumber Kings | 1 | |
| 4 | Portage la Prairie Terriers | 4 | Pembroke Lumber Kings | 6 | |
| 5 | Portage la Prairie Terriers | 4 | Pembroke Lumber Kings | 2 |
Eastern Champions: Pembroke Lumber Kings