These events occured in 1921 in the world of hockey:
- Ottawa Senators defeats Toronto St. Patricks to win the NHL championship.
- Vancouver Millionaires defeats Seattle Metropolitans in a two–game total–goal series 1–3, 6–0 (7–3) to win the PCHA championship.
21 March – 4 April — Ottawa Senators defeats Vancouver Millionares in the 1921 Stanley Cup Finals by 3 games to 2
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