UK general election on 7 May 2015 Elections won by Social Democratic & Labour Party
A general election to the 56th Parliament of the United Kingdom with an electorate of 46,354,197, having 30,697,525 valid votes and 102,639 invalid votes.
Read the House of Commons Library briefing.
| Constituency | Candidate | Electorate | Turnout | Votes | Vote share | Vote change | Majority |
| Belfast South | MCDONNELL, Alasdair | 64,927 | 60.0% | 9,560 | 24.5% | -16.5% | 906 |
| Foyle | DURKAN, Mark | 70,036 | 52.8% | 17,725 | 47.9% | 3.2% | 6,046 |
| South Down | RITCHIE, Margaret | 75,220 | 56.8% | 18,077 | 42.3% | -6.1% | 5,891 |
Turnout as calculated by the House of Commons Library, is the total number of votes cast and not spoiled, divided by the size of the electorate.