December 6 – Federal election: William Lyon Mackenzie King's Liberals win a minority, defeating Arthur Meighen's Conservatives. Agnes Macphail becomes the first woman elected to Parliament, representing the rural Ontario riding of Grey South East. That election was the first in which all Canadian women (at least 21 years of age) had the right to vote and to stand as candidates. Macphail was re-elected to the House of Commons four times and served for more than eighteen years. Later, she would be one of the first two women elected to the Ontario legislature.
December 29 – Mackenzie King becomes prime minister, replacing Arthur Meighen.
Full date unknown
The school board in Victoria, B.C., creates a segregated school for the Chinese population. After a boycott of the new school, the plan is scrapped.