These events occured in 1918 in the world of hockey:
- The temporary Toronto Arenas team defeats the Montreal Canadiens 10–7 to win the inaugural National Hockey League (NHL) championship
- Vancouver Millionaires defeats Seattle Metropolitans 3–2 to win the Pacific Coast Hockey Association championship
- 20–30 March — Toronto Arenas (NHL) defeats Vancouver Millionaires (PCHA) in the 1918 Stanley Cup Finals by 3 games to 2
- 2 January — Montreal Wanderers disbands following destruction of its home venue by fire
- Allan Cup is won by Kitchener Greenshirts
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