See also: 1904 in Canada, other events of 1905, 1906 in Canada and the Timeline of Canadian history.

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Events

• January 25 - 1905 Ontario election: Sir James Whitney's Conservatives win a majority, defeating G. W. Ross's Liberals
• February 8 - Sir James Whitney becomes premier of Ontario, replacing George Ross
• February 27 - Clifford Sifton resigns from cabinet
• March 23 - Lomer Gouin becomes premier of Quebec, replacing Simon-Napoléon Parent
• July 20 - The Saskatchewan Act receives Royal Assent
• August 26 - Roald Amundsen begins the first to travel through the Northwest Passage
• September 1 - The Autonomy Act is passed, thus creating Saskatchewan and Alberta.
• September 2 - Alexander Rutherford becomes the first premier of Alberta.
• September 5 - Walter Scott becomes the first premier of Saskatchewan.
• November 9 - 1905 Alberta election: Alexander Rutherford's Liberals win a majority in the first Alberta election
• November 24 - The Canadian Northernis complete to Edmonton
• December 13 - 1905 Saskatchewan election: Walter Scott's Liberals win a majority in the first Saskatchewan election

Births

• January 21 - George Craig Laurence, physicist
• January 28 - Ellen Fairclough, politician
• February 8 - Louis-Philippe Pigeon, jurist
• March 27 - Elsie MacGill, aerospace engineer
• April 30 - John Peters Humphrey, principal drafter of the Universal Declaration of Human Rights
• May 23 - Donald Fleming, politician
• June 8 - Ralph Steinhauer, native leader
• June 23 - Jack Pickersgill, politician
• July 25 - Grace MacInnis, politician
• August 1 - Helen Hogg-Priestley, astronomer
• August 15 - E.K Brown, literary critic
• November 1 - Paul-Émile Borduas, abstract painter

Deaths