The 1991 Centennial Cup was the 21st Junior "A" 1991 ice hockey National Championship for the Canadian Junior A Hockey League. The Centennial Cup was competed for by the winners of the Doyle Cup, Anavet Cup, Central Canadian Championship, the Eastern Canadian Champion and a host city. The tournament was hosted by the Sudbury Cubs and Sudbury, Ontario.

The Playoffs

The Thunder Bay Flyers coached by Dave Siciliano won the Anderson Cup as the United States Hockey League regular season champion, byt lost in the playoffs finals. In the Dudley Hewitt Cup finals versus the Sudbury Cubs, the Flyers won by a 5–1 score.

Round Robin

Results

Semi-finals and Final

Awards

All-Star Team

Forward Defence Goal

Roll of League Champions