Events from the year 1825 in Canada.
- January 2 - The Parliament House, at Toronto, is burned.
- June 27 - The Canada Company is founded
- September 7 - Soldiers of the 70th Regiment subdue a fire, which consumes over eighty buildings, in Montreal.
- September to October: The Great Miramichi Fire destroys at least 10 000 km ² to 20,000 km ² and killing at least 280 people.
- October 26 - US finishes ambitious Erie Canal from Buffalo to Hudson River and New York City. It puts competitive pressure on Montreal and Toronto merchant elites to finish canals.
- The Peter Robinson settlement brings 2,000 poor Irish families to Scott's Plains (now Peterborough, Ontario).
- February 24 - Richard William Scott, politician and Minister (died 1913)
- March 22 - Jane Mackenzie, second wife of Alexander Mackenzie, 2nd Prime Minister of Canada (died 1893)
- March 24 - Joseph-Octave Beaubien, physician and politician (died 1877)
- April 13 - D'Arcy McGee, journalist, politician and Father of Confederation, assassinated (died 1868)
- May 25 - William Hallett Ray, politician, (died 1909)
- May 29 - William Henry Pope, lawyer, politician, judge and a Father of Confederation (died 1879)
- July 29 - Thomas McGreevy, politician and contractor (died 1897)
- August 12 - Louis-Charles Boucher de Niverville, lawyer and politician (died 1869)
- August 20 - Amor De Cosmos, journalist, politician and 2nd Premier of British Columbia (died 1897)
Full date unknown