Results for a UK general election on 6 May 2010 Elections contested by Sinn Féin
A general election to the 55th Parliament of the United Kingdom with an electorate of 45,597,461, having 29,687,604 valid votes and 81,879 invalid votes.
Read the House of Commons Library briefing.
| Constituency | Candidate | Electorate | Turnout | Votes | Vote share | Vote change | Position |
| Belfast East | O'DONNGHAILE, Niall | 59,007 | 58.4% | 817 | 2.4% | -0.1% | 5th |
| Belfast North | KELLY, Gerry | 65,504 | 56.5% | 12,588 | 34.0% | 7.1% | 2nd |
| Belfast West | ADAMS, Gerry | 59,522 | 54.0% | 22,840 | 71.1% | 2.5% | 1st |
| East Antrim | MCMULLAN, Oliver | 60,204 | 50.7% | 2,064 | 6.8% | 1.4% | 4th |
| East Londonderry | O HOISIN, Cathal | 63,220 | 55.3% | 6,742 | 19.3% | 1.9% | 2nd |
| Fermanagh and South Tyrone | GILDERNEW, Michelle | 67,908 | 68.9% | 21,304 | 45.5% | 7.3% | 1st |
| Foyle | ANDERSON, Martina | 65,843 | 57.5% | 12,098 | 31.9% | -1.4% | 2nd |
| Lagan Valley | BUTLER, Paul | 65,257 | 56.0% | 1,465 | 4.0% | -0.3% | 6th |
| Mid Ulster | MCGUINNESS, Martin | 64,594 | 63.2% | 21,239 | 52.0% | 4.4% | 1st |
| Newry and Armagh | MURPHY, Conor | 74,308 | 60.4% | 18,857 | 42.0% | 0.6% | 1st |
| North Antrim | MCKAY, Daithi | 73,338 | 57.8% | 5,265 | 12.4% | -1.8% | 3rd |
| North Down | PARKER, Vincent | 60,698 | 55.2% | 250 | 0.7% | 0.1% | 7th |
| South Antrim | MCLAUGHLIN, Mitchel | 63,054 | 53.9% | 4,729 | 13.9% | 3.2% | 3rd |
| South Down | RUANE, Caitriona | 70,784 | 60.2% | 12,236 | 28.7% | 1.7% | 2nd |
| Strangford | COOGAN, Michael | 60,539 | 53.7% | 1,161 | 3.6% | -0.1% | 6th |
| Upper Bann | O'DOWD, John | 74,732 | 55.4% | 10,237 | 24.7% | 3.8% | 3rd |
| West Tyrone | DOHERTY, Pat | 61,148 | 61.0% | 18,050 | 48.4% | 9.5% | 1st |
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.