Results for the UK general election on 7 May 2015 Northern Ireland - by party
Registered political parties nominating candidates standing in the general election on 7 May 2015. This list does not include candidates standing as independents or the candidate standing as House of Commons Speaker.
| Party | Constituencies contested | Votes | Vote share | Constituencies won |
| Democratic Unionist Party | 16 | 184,260 | 25.7% | 8 |
| Sinn Féin | 18 | 176,232 | 24.5% | 4 |
| Social Democratic & Labour Party | 18 | 99,809 | 13.9% | 3 |
| Ulster Unionist Party | 15 | 114,935 | 16.0% | 2 |
| Alliance | 18 | 61,556 | 8.6% | 0 |
| UK Independence Party | 10 | 18,324 | 2.6% | 0 |
| Traditional Unionist Voice | 7 | 16,538 | 2.3% | 0 |
| Conservative | 16 | 9,055 | 1.3% | 0 |
| Green Party Northern Ireland | 5 | 6,822 | 1.0% | 0 |
| People Before Profit Alliance | 1 | 6,798 | 0.9% | 0 |
| The Workers' Party | 5 | 2,724 | 0.4% | 0 |
| Cannabis Is Safer Than Alcohol | 4 | 1,853 | 0.3% | 0 |