These events occured in 1912 in the world of hockey:
- Quebec Bulldogs wins the National Hockey Association (NHA) championship and the Stanley Cup. Quebec then defeats Moncton in a Cup challenge.
- March — Winnipeg Victorias repeats as Allan Cup winners
- March — New Westminster Royals wins the inaugural Pacific Coast Hockey Association (PCHA) championship
- December — Toronto NHA teams, the Blueshirts and Tecumsehs, join the NHA