List of political parties in Northern Ireland

Although Northern Ireland is a part of the United Kingdom, it has a quite distinct party system from the rest of the country, as the Labour Party and Liberal Democrats do not contest elections there (though the Liberal Democrats have links with the Alliance Party), and the Conservative Party has received only limited support in recent elections. Party affiliation is generally based on religious and ethnic background.

The Northern Ireland Assembly is elected by single transferable vote and the composition of the Northern Ireland Executive is by power sharing determined by the D'Hondt system, among the members elected to the assembly. Northern Ireland also elects 18 MPs to the House of Commons, and there are elections to 11 local government districts.

Some parties, such as Sinn Féin and the Workers' Party, are organised on an all-Ireland basis. Others such as the Conservative Party are organised on an all-United Kingdom basis. There are many Northern Ireland-specific parties and these, on the whole, predominate.

The distinction between "unionist/loyalist", "nationalist/republican" and "other" is not always easy with some parties and individuals. Some have defined themselves less by their position on the "Border Question" than on other political issues.

For example, the former Republican Labour Party/Social Democratic and Labour Party MP Gerry Fitt's career suggests he was first and foremost a socialist rather than a nationalist and he eventually left the SDLP claiming it had drifted from its founding intentions. Similarly the Workers' Party has its roots in the republican Official IRA but nowadays is considered to be a non-violent socialist and nationalist party. Several parties strive to be avowedly non-sectarian and would not consider themselves to be either unionist or nationalist. The Northern Ireland Assembly requires MLAs to designate themselves either "Unionist", "Nationalist" or "Other". This is a designation that is particularly resented by those who designate as "Other", as they have no input on who becomes First or Deputy First Minister.

There are some who see the terms "Unionist"/"Loyalist" and "Nationalist"/"Republican" as being of more relevance to the community that the party seeks to represent rather than the position on the border question. Several of the "Other" parties strive to be non-sectarian but have a clear position on the border.

Political parties with elected representation at a local, national, or UK level

Party details

Party Founded Political
position
Ideology Designation Leader(s) Local
government
Northern Ireland Assembly House of Commons
(NI Seats)
House of Lords

Sinn Féin
1905 Centre-left to
left-wing
Irish republicanism
Democratic socialism
Left-wing nationalism
Nationalist Michelle O'Neill
144 / 462
27 / 90
7 / 18
(abstentionist)
Democratic Unionist Party 1971 Right-wing British unionism
British nationalism
National conservatism
Right-wing populism
Euroscepticism
Unionist Gavin Robinson
122 / 462
25 / 90
5 / 18
6 / 779

Alliance Party of Northern Ireland
1970 Centre Liberalism
Nonsectarianism
Pro-Europeanism
Other Naomi Long
67 / 462
17 / 90
1 / 18
0 / 779
Ulster Unionist Party 1905 Centre-right Unionist Mike Nesbitt
54 / 462
9 / 90
1 / 18
2 / 779

Social Democratic and Labour Party
1970 Centre-left
  • Social democracy
  • Irish nationalism
    Pro-Europeanism
Nationalist Claire Hanna
39 / 462
8 / 90
2 / 18
0 / 779

Traditional Unionist Voice
2007 Right-wing
  • British unionism
  • National conservatism
  • Social conservatism
  • Anti-Good Friday Agreement
  • Hard Euroscepticism
Unionist Jim Allister
10 / 462
1 / 90
1 / 18

People Before Profit
2005 Left-wing to
far-left
Trotskyism
Socialism
Anti-capitalism
Irish reunification
Other Richard Boyd Barrett
2 / 462
1 / 90

Green Party NI
1985 Centre-left to
left-wing
Green politics
Nonsectarianism
Pro-Europeanism
Other Malachai O'Hara
5 / 462

Progressive Unionist Party
1985 Centre-left to
left-wing
British unionism
Ulster loyalism
Democratic socialism
Social democracy
Unionist Russell Watton
1 / 462

Northern Ireland Conservatives
1989 Centre-right to right-wing British unionism
Conservatism
Economic liberalism
Unionist Paul Leeman
2 / 779

Labour Party in Northern Ireland
2003 Centre-left Social democracy Unionist Erskine Holmes
1 / 779
Northern Ireland Liberal Democrats 1988 Centre to
centre-left
Liberalism
Social liberalism
Nonsectarianism
Pro-Europeanism
Unionist Stephen Glenn
1 / 779

Party representation

Party Representation (as of 3 October 2023)
UK Parliament Assembly Local councils
House of Commons House of Lords
Sinn Féin 7 0 27 144
Democratic Unionist Party 5 6 25 122
Alliance Party of Northern Ireland 1 0 17 67
Ulster Unionist Party 1 2 9 54
Social Democratic and Labour Party 2 0 8 39
Traditional Unionist Voice 1 0 1 10
People Before Profit 0 0 1 2
Green Party Northern Ireland 0 0 0 5
Progressive Unionist Party 0 0 0 1
Aontú 0 0 0 0
Northern Ireland Conservatives 0 2 0 0
Labour Party in Northern Ireland 0 1 0 0
Northern Ireland Liberal Democrats 0 1 0 0
  1. Lord Alderdice, leader of the Alliance from 1987–98, has sat in the Lords since 1996, taking the Lib Dem whip.
  2. Margaret Ritchie, leader of the SDLP from 2010–11, has sat in the Lords since 2019, resigning from the party to do so.

Other registered parties

Unionist and loyalist

Party Founded Political
position
Ideology Leader(s)

Heritage Party
2020 Right-wing Euroscepticism
British unionism
British nationalism
Social conservatism
Right-wing populism
David Kurten

Nationalist and republican

Party Founded Political
position
Ideology Leader(s)

Aontú
English: Unity
2019 Irish republicanism
Social conservatism
Peadar Tóibín

Communist Party of Ireland
Irish: An Páirtí Cumannach na hÉireann
1933
1970 (refoundation)
Far-left Communism
Marxism-Leninism
Jimmy Corcoran (General Secretary)

Fianna Fáil
English: Warriors of Fál or
Soldiers of Destiny
1926 Centre to
centre-right
Irish republicanism
Conservative liberalism
Christian democracy
Micheál Martin

Irish Republican Socialist Party
1974 Far-left Communism
Marxism-Leninism
Irish republicanism
Dissident republicanism
Hard euroscepticism
Ard Chomhairle
English: National Executive

Republican Network for Unity
2007 Left-wing Irish republicanism
Dissident republicanism
Socialism

Saoradh
English: Liberation
2016 Far-left Irish republicanism
Dissident republicanism
Revolutionary socialism
Hard Euroscepticism
Anti-imperialism
Stephen Murney

Workers' Party
Irish: An Páirtí na nOibrithe
1970 Far-left Communism
Marxism-Leninism
Irish republicanism
Collective leadership

Others

Party Founded Political
position
Ideology Leader(s) Notes

Cross-Community Labour Alternative
2015 Left-wing Democratic socialism
Anti-capitalism
Nonsectarianism
Owen McCracken

Socialist Party
1996 Left-wing to far-left Democratic socialism
Political radicalism
Trotskyism
Euroscepticism
Collective leadership

Unregistered parties

Candidates for unregistered parties may choose either to be listed as "Non-Party", or to leave the section blank on the ballot paper, in the same manner as independent candidates.

Nationalist and Republican

  • 32 County Sovereignty Movement - Does not contest elections, operates as a pressure group
  • Anti-Imperialist Action Ireland - Does not contest elections
  • Fine Gael
  • National Party
  • Republican Sinn Féin (RSF)

Unionist

  • Reform UK
  • Advance UK

Inactive parties

Unionist and loyalist

  • Belfast Labour Party
  • British Ulster Dominion Party
  • Commonwealth Labour Party
  • Independent Unionist Association
  • Labour Unionist Party
  • NI21
  • UKIP Northern Ireland
  • Northern Ireland Unionist Party - deregistered 2008
  • Protestant Coalition
  • Ulster Defence Party* (UDP)
  • Protestant Unionist Party (evolved into the DUP)
  • Ulster Constitution Party
  • Ulster Democratic Party
  • Ulster Loyalist Democratic Party
  • Ulster Popular Unionist Party
  • Ulster Progressive Unionist Association
  • Ulster Protestant League
  • Ulster Resistance
  • Ulster Unionist Labour Association
  • Unionist Party of Northern Ireland
  • United Kingdom Unionist Party - deregistered 2008
  • United Ulster Unionist Council
  • United Ulster Unionist Party
  • United Unionist Coalition (UUC)
  • Vanguard Progressive Unionist Party
  • Volunteer Political Party

Nationalist and Republican

  • All Ireland Anti-Partition League
  • Federation of Labour
  • Fianna Uladh
  • Irish Anti-Partition League
  • Independent Socialist Party
  • Irish Independence Party
  • National Democratic Party
  • National League of the North
  • National Unity
  • Nationalist Party
  • Northern Council for Unity
  • Official Sinn Féin (now Workers' Party)
  • People's Democracy
  • Red Republican Party
  • Republican Congress
  • Republican Labour Party
  • Saor Éire
  • Socialist Republican Party
  • Unity

Others

  • Commonwealth Labour Party
  • Communist Party of Ireland (Marxist-Leninist)
  • Communist Party of Northern Ireland
  • Irish Labour Party (contests elections in the Republic)
  • Labour coalition
  • Labour Party of Northern Ireland
  • Northern Ireland Labour Party
  • Northern Ireland Women's Coalition
  • Newtownabbey Labour Party
  • Newtownabbey Ratepayers Association
  • Natural Law Party
  • Social Democratic Party - The post-1988 rump of the party stood in a Northern Ireland by-election in 1990; the party as a whole existed and was more prominent in Great Britain from 1981 to 1988 although the post-1990 rump group still exists.
  • Ulster Independence Movement
  • Ulster Liberal Party
  • Ulster Movement for Self-Determination
  • United Labour Party (Northern Ireland)
  • Ulster Third Way - deregistered 2005
  • Veritas - Dissolved June 2015
  • Vote for Yourself Party - disbanded April 2009, de-registered 8 June 2009
  • World Socialist Party (Ireland) - Dissolved in the 1990s

Flowchart of all political parties in Northern Ireland

Party leaders

Party leaders serving 10 years or more are

Leader Years Party/Period Constituency
Ian Paisley 42y Protestant Unionist Party 1966–1971
Democratic Unionist Party 1971–2008
Bannside, North Antrim
Ruairí Ó Brádaigh 36y Sinn Féin 1970–1983
Republican Sinn Féin 1986–2009
Gerry Adams 35y Sinn Féin 1983–2018 West Belfast, Louth
William Norton 28y Irish Labour 1932–1960
Tomás Mac Giolla 26y Sinn Féin 1962–1970
Official Sinn Féin 1970–1977
Sinn Féin The Workers' Party 1977–1982
Workers' Party 1982–1988
Hugh Smyth 23y Progressive Unionist Party 1979–2002
John Hume 22y Social Democratic and Labour Party 1979–2001 Foyle
Albert McElroy 19y Ulster Liberal Party 1956–1975 (?)
Lord Craigavon 19y Ulster Unionist Party 1921–1940 Down, North Down
John Redmond 18y Irish Parliamentary Party 1900–1918 Waterford City
Lord Brookeborough 17y Ulster Unionist Party 1946–1963 Lisnaskea
James Molyneaux 16y Ulster Unionist Party 1979–1995 South Antrim, Lagan Valley
Joseph Devlin 16y Nationalist Party 1918–1934 Belfast Falls, Fermanagh and Tyrone, Belfast Central
Gerry Fitt 15y Republican Labour Party 1964–1970
Social Democratic and Labour Party 1970–1979
Belfast West, Belfast Dock
James Kilfedder 15y Ulster Popular Unionist Party 1980–1995 North Down
David Ford 15y Alliance Party 2001–2016 South Antrim
Margaret Buckley 13y Sinn Féin 1937–1950
Robert McCartney 13y UK Unionist Party 1995–2008 North Down
James McSparran 13y Nationalist Party 1945–1958 Mourne
Oliver Napier 12y Alliance Party 1972–1984 Belfast East
Thomas Joseph Campbell 11y Nationalist Party 1934–1945 Belfast Central
Sir Edward Carson 11y Ulster Unionist Party 1910–1921 Dublin University, Belfast Duncairn
John Alderdice 11y Alliance Party 1987–1998 Belfast East
David Trimble 10y Ulster Unionist Party 1995–2005 Upper Bann

See also

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