An election to the 56th Parliament of the United Kingdom for the constituency area of Portsmouth North, held as part of the general election on 7 May 2015.
Conservative hold by Penny Mordaunt with a majority of 10,537 - 23.2% - on a turnout of 62.1%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| MORDAUNT, Penny | Con | 21,343 | 47.0% | 2.7% |
| FERRETT, John | Lab | 10,806 | 23.8% | -3.9% |
| FITZGERALD, Mike | UKIP | 8,660 | 19.1% | 15.0% |
| SANDERS, Darren | LD | 2,828 | 6.2% | -13.9% |
| ELLIS, Gavin | Green | 1,450 | 3.2% | 2.1% |
| WOODS, Jon | TUSC | 231 | 0.5% | 0.2% |
| GEORGE, Steven | JACP | 72 | 0.2% | - |
Under section 13(b) of the Representation of the People Act 1985, a candidate gaining 5% or less of the vote share will forfeit their deposit.
An electorate of 73,105, having a valid vote count of 45,390 and an invalid vote count of 157.
Result declared at 06:17 on 8 May 2015.