List of marginal seats in the Canadian general election, 2015

Based on the transposition of votes from the 2011 election to the new ridings created under the 2012 redistribution, the following seats had a margin of victory of less than 5 percentage points in that election:

* - indicates a margin of less than 5 points between 1st and 3rd place

Analysis of 2015 results

Gains and losses by party in marginal seats |- ! rowspan="2" colspan="2" style="text-align:left;" | Party in 1st place (2011)!!rowspan="2"|Holds !!rowspan="2"|Gains !! colspan="4"|Party taken from |- !Conservative!!NDP !!Liberal !! Bloc |- | 1 | 3 | | 2 | | 1 |- | 5 | 4 | 4 | | | |- | 13 | 24 | 13 | 10 | | 1 |- | 1 | – | | | | |- | colspan="2" style="text-align:left;" | Total | 20 | 31 | 17 | 12 | – | 2 |}

Analysis of 2011 rankings

First- and second-place finishes of such seats were grouped as follows:

Marginal seats: ranked by 1st and 2nd place |- ! rowspan="2" colspan="2" style="text-align:left;" | Party in 1st place !! colspan="4"|Party in 2nd place !!rowspan="2"|Total |- !Conservative!!NDP !!Liberal !! Bloc |- | | 6 | 12 | | 18 |- | 12 | | 5 | | 17 |- | 8 | 5 | | | 13 |- | | 3 | | | 3 |- | colspan="2" style="text-align:left;" | Total | 20 | 14 | 17 | | 51 |}

Broken down by province:

Marginal seats – analysis by province/territory |- ! colspan="2" style="text-align:left;" | Party in 1st place !! BC !!MB !! NL !!NS !!ON !!PE !!QC !!SK !!YK !!Total |- | 2 | 3 | 2 | | 9 | | 1 | | 1 | 18 |- | 6 | 1 | | 1 | 3 | | 5 | 1 | | 17 |- | 1 | | | 2 | 6 | 1 | 3 | | | 13 |- | | | | | | | 3 | | | 3 |- | colspan="2" style="text-align:left;" | Total | 9 | 4 | 2 | 3 | 18 | 1 | 12 | 1 | 1 | 51 |}