Results for the UK general election on 6 May 2010 Northern Ireland - Elections contested by Social Democratic & Labour Party
| Constituency | Candidate | Electorate | Turnout | Votes | Vote share | Vote change | Position |
| Belfast East | MULDOON, Mary | 59,007 | 58.4% | 365 | 1.1% | -1.1% | 6th |
| Belfast North | MAGINNESS, Alban | 65,504 | 56.5% | 4,544 | 12.3% | -4.5% | 3rd |
| Belfast South | MCDONNELL, Alasdair | 59,524 | 57.4% | 14,026 | 41.0% | 10.9% | 1st |
| Belfast West | ATTWOOD, Alex | 59,522 | 54.0% | 5,261 | 16.4% | 0.3% | 2nd |
| East Antrim | MCCAMPHILL, Justin | 60,204 | 50.7% | 2,019 | 6.6% | -0.8% | 5th |
| East Londonderry | CONWAY, Thomas | 63,220 | 55.3% | 5,399 | 15.4% | -3.9% | 4th |
| Fermanagh and South Tyrone | MCKINNEY, Fearghal | 67,908 | 68.9% | 3,574 | 7.6% | -7.2% | 3rd |
| Foyle | DURKAN, Mark | 65,843 | 57.5% | 16,922 | 44.7% | -1.7% | 1st |
| Lagan Valley | HEADING, Brian | 65,257 | 56.0% | 1,835 | 5.0% | 1.5% | 5th |
| Mid Ulster | QUINN, Tony | 64,594 | 63.2% | 5,826 | 14.3% | -3.2% | 3rd |
| Newry and Armagh | BRADLEY, Dominic | 74,308 | 60.4% | 10,526 | 23.4% | -1.7% | 2nd |
| North Antrim | O'LOAN, Declan | 73,338 | 57.8% | 3,738 | 8.8% | -2.2% | 5th |
| North Down | LOGAN, Liam | 60,698 | 55.2% | 680 | 2.0% | -1.1% | 6th |
| South Antrim | BYRNE, Michelle | 63,054 | 53.9% | 2,955 | 8.7% | -2.5% | 4th |
| South Down | RITCHIE, Margaret | 70,784 | 60.2% | 20,648 | 48.5% | 1.6% | 1st |
| Strangford | HANNA, Claire | 60,539 | 53.7% | 2,164 | 6.7% | -1.8% | 4th |
| Upper Bann | KELLY, Dolores | 74,732 | 55.4% | 5,276 | 12.7% | -0.2% | 4th |
| West Tyrone | BYRNE, Joe | 61,148 | 61.0% | 5,212 | 14.0% | 4.9% | 4th |
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.
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.
This was the first election on a new set of constituency boundaries in England, Northern Ireland and Wales. The vote share calculations in those countries are based on notional results, which estimate the outcome of the previous election had it been contested on the new boundaries.