The 1984 Canadian federal election was held on September 4, 1984, to elect members to the House of Commons of the 33rd Parliament of Canada.

Winning the most seats in Canadian political history, the Progressive Conservative Party (PC Party), led by Brian Mulroney, defeated the incumbent governing Liberal Party led by Prime Minister John Turner. This was the first election since 1958 in which the PC Party won a majority government and is also the only time since 1958 that Canada's governing party received an actual majority of votes cast.

The Liberals suffered the worst defeat of a sitting government in Canadian history since 1935, with their seat count falling to 40. That would be their smallest ever until their 34 seats in 2011. They won only two seats west of Ontario: John Turner in Vancouver Quadra for a gain, and Lloyd Axworthy holding on in Winnipeg—Fort Garry. The remainder would be concentrated around Montreal and Metro Toronto. The collapse of Liberal support in Quebec was staggering: since 1896, with the exception of 1958, they had always won the most seats in that province. After 1984, they would not attain that again until 2015 (but they won the Quebec popular vote in 2000).

This election also saw the collapse of Social Credit, which failed to even obtain a third-place result in the ridings it contested, receiving less support than the Rhinoceros Party. The Parti nationaliste du Québec received more support than its predecessor, the Union populaire, and even attained a third-place result in Matapédia—Matane.

The Confederation of Regions Party appeared for the first time, receiving several second-place results out West. The Green Party also made its first appearance, fielding candidates mainly in Ontario, Alberta and British Columbia.

Results analysis

+ Change in popular vote by party (1984 vs 1980) Party 1984 1980 Change (pp)

+ Party candidates in 2nd place Party in 1st place 1984 1980Party in 2nd place Total Party in 2nd placeLiberals and PCs tied for second place in Beaches. TotalPC Lib NDP CoR PC Lib NDP SC Rhino 154 54 3 211 81 22 10335 5 40 77 60 8 2 14726 4 30 23 10 331 1 – Total62 158 59 3 282 100 91 82 8 2 283

+ Principal races, according to 1st and 2nd-place results Parties Seats 18980391 Total282

+ Party rankings (1st to 5th place) Party 1984 19801st 2nd 3rd 4th 5th 1st 2nd 3rd 4th 5th211 62 9 103 100 74 5 40 158 82 2 147 91 44 30 59 189 4 32 82 157 6 31 46 16 33 24 3 33 8 1 65 21 2 1 82 30 1 28 44 6 5 39 11 28 29 37 17 3 10 4 16 8 5 35 51 1 14 14 16 6 27 52

Synopsis of results