This article lists the Social Democratic and Labour Party's election results in UK parliamentary elections.

Summary of general election performance Year Number of Candidates Total votes Average votes per candidate % UK vote % NI vote Change (percentage points) Saved deposits Number of MPs (out of NI total)1974 Feb 12 160,137 13,345 0.5 22.4 N/A 8 1974 Oct 9 154,193 17,133 0.6 22.0 +0.1 8 1979 9 126,325 14,036 0.4 19.7 -0.2 6 1983 17 137,012 8,060 0.4 18.1 0.0 10 1987 13 154,067 11,851 0.5 21.1 +0.1 13 1992 13 184,445 14,118 0.5 23.5 0.0 13 1997 18 190,814 10,601 0.6 24.1 +0.1 15 2001 18 169,865 9,437 0.6 21.0 0.0 16 2005 18 125,626 6,979 0.5 17.5 -0.1 16 2010 18 110,970 6,165 0.4 16.5 -0.1 16 2015 18 99,809 5,545 0.3 13.9 -0.1 15 2017 18 95,419 5,301 0.3 11.7 -0.1 13 2019 15 118,737 7,916 0.3 14.9 0.0 13 20241886,8614,8260.311.10.08

February 1974 general election Constituency Candidate Votes % PositionArmagh 18,090 29.3 2Belfast East 1,502 2.6 4Belfast North 12,003 24.4 3Belfast South 4,149 8.0 4Belfast West 19,554 41.0 1Fermanagh and South Tyrone 15,410 25.0 3Londonderry 23,670 37.7 2Mid Ulster 19,372 29.1 2North Antrim 10,056 15.5 3North Down 2,376 3.8 3South Antrim 8,769 12.3 3South Down 25,486 42.8 2

October 1974 general election Constituency Candidate Votes % PositionArmagh 19,855 31.8 2Belfast North 11,400 24.1 2Belfast South 2,390 4.7 4Belfast West 21,821 49.0 1Londonderry 26,118 40.4 2Mid Ulster 25,885 40.1 2North Antrim 7,616 12.8 3South Antrim 9,061 13.2 3South Down 30,047 45.4 2

1979 general election Constituency Candidate Votes % PositionArmagh 23,545 36.1 2Belfast North 7,823 18.5 3Belfast South 3,694 7.9 3Belfast West 16,480 49.5 1Londonderry 19,185 30.2 2Mid Ulster 19,266 29.4 2North Antrim 4,867 7.4 4South Antrim 7,432 10.1 3South Down 24,033 37.3 2

By-elections, 1979–1983 Election Candidate Votes % Position1982 Belfast South by-election 3,839 8.8 4

1983 general election Constituency Candidate Votes % PositionBelfast East 519 1.3 6Belfast North 5,944 14.0 3Belfast South 3,216 8.6 4Belfast West 10,934 24.6 2East Antrim 1,047 2.7 4East Londonderry 9,397 18.3 3Fermanagh and South Tyrone 9,923 16.5 3Foyle 24,071 46.0 1Lagan Valley 2,603 6.4 4Mid Ulster 12,044 22.4 3Newry and Armagh 17,434 36.8 2North Antrim 6,193 14.0 3North Down 645 1.6 4South Antrim 3,377 8.7 4South Down 20,145 39.3 2Strangford 1,713 4.4 4Upper Bann 7,807 17.9 2

By-elections, 1983–1987 Election Candidate Votes % Position1986 Fermanagh and South Tyrone by-election 12,081 21.5 31986 Mid Ulster by-election 13,021 25.3 31986 Newry and Armagh by-election 22,694 45.5 11986 South Down by-election 23,121 44.8 2

1987 general election Constituency Candidate Votes % PositionBelfast North 5,795 15.7 2Belfast South 4,268 13.1 3Belfast West 14,641 35.7 2East Londonderry 9,375 19.2 2Fermanagh and South Tyrone 10,581 19.1 3Foyle 23,743 48.8 1Lagan Valley 2,888 6.9 3Mid Ulster 13,644 26.2 2Newry and Armagh 25,137 48.1 1North Antrim 5,149 12.5 2South Antrim 3,611 9.9 3South Down 26,579 47.0 1Upper Bann 8,676 20.5 2

By-elections, 1987–1992 Election Candidate Votes % Position1990 Upper Bann by-election 6,698 18.9 2

1992 general election Constituency Candidate Votes % PositionBelfast North 7,615 21.2 2Belfast South 6,266 18.7 2Belfast West 17,415 43.6 1East Londonderry 11,843 22.4 2Fermanagh and South Tyrone 12,810 23.2 2Foyle 26,710 51.5 1Mid Ulster 16,994 31.0 2Newry and Armagh 26,073 49.6 1North Antrim 6,512 14.3 3South Antrim 5,397 12.8 2South Down 31,523 51.2 1Upper Bann 10,661 23.4 2

1997 general election Constituency Candidate Votes % PositionBelfast East 629 1.6 6Belfast North 8,454 20.4 2Belfast South 9,601 24.3 2Belfast West 17,753 38.7 2East Antrim 1,576 4.6 6East Londonderry 8,273 22.0 3Fermanagh and South Tyrone 11,060 22.9 3Foyle 25,109 52.5 1Lagan Valley 3,436 7.8 4Mid Ulster 11,205 22.1 3Newry and Armagh 22,904 43.0 1North Antrim 7,333 15.9 3North Down 1,602 4.4 5South Antrim 6,497 16.2 2South Down 26,181 52.9 1Strangford 2,775 6.7 4Upper Bann 11,584 24.2 2West Tyrone 14,842 32.1 2

By-elections, 1997–2001 Election Candidate Votes % Position2000 South Antrim by-election 3,496 11.4 3

2001 general election Constituency Candidate Votes % PositionBelfast East 880 2.4 6Belfast North 8,592 21.0 3Belfast South 11,609 30.6 2Belfast West 7,754 18.9 2East Antrim 2,641 7.3 4East Londonderry 8,298 20.8 3Fermanagh and South Tyrone 9,706 18.7 3Foyle 24,538 50.2 1Lagan Valley 3,462 7.5 4Mid Ulster 8,376 16.8 3Newry and Armagh 20,784 37.4 1North Antrim 8,283 16.8 3North Down 1,275 3.4 3South Antrim 5,336 12.1 3South Down 24,136 46.3 1Strangford 2,646 6.1 4Upper Bann 7,607 14.9 4West Tyrone 13,942 28.7 3

2005 general election Constituency Candidate Votes % PositionBelfast East 844 2.7 5Belfast North 4,950 16.2 3Belfast South 10,339 32.3 1Belfast West 5,033 14.6 2East Antrim 1,695 5.3 4East Londonderry 6,077 17.1 3Fermanagh and South Tyrone 7,230 14.8 4Foyle 21,119 46.3 1Lagan Valley 2,598 6.1 5Mid Ulster 7,922 17.4 3Newry and Armagh 12,770 25.2 2North Antrim 5,585 12.2 3North Down 1,009 3.1 4South Antrim 4,706 12.4 3South Down 21,557 44.7 1Strangford 2,496 6.7 4Upper Bann 5,747 13.0 4West Tyrone 3,949 9.1 4

2010 general election Constituency Candidate Votes % PositionBelfast East 365 1.1 6Belfast North 4,544 12.3 3Belfast South 14,026 41.0 1Belfast West 5,261 16.4 2East Antrim 2,019 6.6 5East Londonderry 5,399 15.4 4Fermanagh and South Tyrone 3,574 7.6 3Foyle 16,922 44.7 1Lagan Valley 1,835 5.0 5Mid Ulster 5,826 14.3 3Newry and Armagh 10,526 23.4 2North Antrim 3,738 8.8 5North Down 680 2.0 6South Antrim 2,955 8.7 4South Down 20,648 48.5 1Strangford 2,164 6.7 4Upper Bann 5,276 12.8 4West Tyrone 5,212 14.0 4

By-elections, 2010–2015 Election Candidate Votes % Position2011 Belfast West by-election 3,088 13.5 22013 Mid Ulster by-election 6,478 17.4 3

2015 general election Constituency Candidate Votes % PositionBelfast East 127 0.3 6Belfast North 3,338 8.2 3Belfast South 9,560 24.5 1Belfast West 3,475 9.8 3East Antrim 1,639 4.9 7East Londonderry 4,268 12.3 4Fermanagh and South Tyrone 2,732 5.4 3Foyle 17,725 47.9 1Lagan Valley 2,500 6.3 4Mid Ulster 5,055 12.4 4Newry and Armagh 12,026 24.1 3North Antrim 2,920 7.0 5North Down 355 1.0 8South Antrim 2,990 8.2 5South Down 18,077 42.3 1Strangford 2,335 6.9 4Upper Bann 4,238 9.0 4West Tyrone 6,444 16.7 3

2017 general election Constituency Candidate Votes % PositionBelfast East 167 0.4 7Belfast North 2,058 4.5 4Belfast South 11,303 25.9 2Belfast West 2,860 7.0 4East Antrim 1,278 3.4 5East Londonderry 4,423 10.8 3Fermanagh and South Tyrone 2,587 4.8 3Foyle 18,087 39.3 2Lagan Valley 3,384 7.5 4Mid Ulster 4,563 9.8 3Newry and Armagh 9,055 16.9 3North Antrim 2,574 5.3 6North Down 400 1.0 7South Antrim 2,362 5.5 5South Down 17,882 35.1 2Strangford 2,404 6.2 4Upper Bann 4,397 8.6 4West Tyrone 5,635 13.0 3

2019 general election The SDLP did not stand candidates in Belfast East, Belfast North or North Down in order to aid anti-Brexit and anti-Democratic Unionist Party candidates in those constituencies. Constituency Candidate Votes % PositionBelfast South 27,079 57.2 1Belfast West 2,985 7.7 4East Antrim 902 2.4 6East Londonderry 6,158 15.7 2Fermanagh and South Tyrone 3,446 6.8 3Foyle 26,881 57.0 1Lagan Valley 1,758 3.9 4Mid Ulster 6,384 14.3 3Newry and Armagh 9,449 18.6 3North Antrim 2,943 6.7 5South Antrim 2,288 5.3 5South Down 14,517 29.2 2Strangford 1,994 5.3 4Upper Bann 4,623 9.2 5West Tyrone 7,330 17.8 3

2024 general election Constituency Candidate Votes % PositionBelfast East 619 1.4 6Belfast North 1,413 3.5 5Belfast South and Mid Down 21,345 49.1 1Belfast West 4,318 10.9 3East Antrim 892 2.2 6East Londonderry 5,260 12.7 3Fermanagh and South Tyrone 2,386 4.7 4Foyle 15,647 40.8 1Lagan Valley 1,028 2.1 5Mid Ulster 3,722 8.2 3Newry and Armagh 6,806 14.8 2North Antrim 1,661 4.0 6North Down 657 1.5 5South Antrim 1,589 3.7 6South Down 10,418 23.0 2Strangford 1,783 4.6 6Upper Bann 1,496 3.2 5West Tyrone 5,821 13.3 3

References

F. W. S. Craig, Chronology of British Parliamentary By-elections 1833-1987 UK General election results February 1974, Richard Kimber's Political Resources UK General election results October 1974, Richard Kimber's Political Resources UK General election results May 1979, Richard Kimber's Political Resources