List of parliamentary constituencies in Northern Ireland
Northern Ireland is divided into 18 Parliamentary constituencies: 4 borough constituencies in Belfast and 14 county constituencies elsewhere. Section 33 of the Northern Ireland Act 1998 provides that the constituencies for the Northern Ireland Assembly are the same as the constituencies that are used for the United Kingdom Parliament. Parliamentary constituencies are not used for local government, which is instead carried out by 11 district councils; these often have different boundaries.
Each constituency returns one Member of Parliament (MP) to the House of Commons at Westminster and five Members of the Legislative Assembly (MLAs) to the devolved Northern Ireland Assembly at Stormont. Six MLAs were returned per constituency until the Assembly Members (Reduction of Numbers) Act (Northern Ireland) 2016 reduced the number to five, effective from the 2017 Assembly election.
2019 general election
|Name[nb 1]||Electorate||Majority[nb 2]||Member of Parliament||Unionist %||Nationalist %||Other %||Map|
|Belfast East BC||66,245||1,819||Gavin Robinson||55.1||0.0||44.9|
|Belfast North BC||72,225||1,943||John Finucane||43.1||47.1||9.8|
|Belfast South BC||69,984||15,401||Claire Hanna||27.2||58.4||14.3|
|Belfast West BC||65,644||14,672||Paul Maskey||13.5||65.7||20.9|
|East Antrim CC||64,830||6,706||Sammy Wilson||62.8||8.1||29.1|
|East Londonderry CC||69,246||9,607||Gregory Campbell||49.3||35.7||15.1|
|Fermanagh & South Tyrone CC||72,848||57||Michelle Gildernew||43.2||50.1||6.3|
|Foyle CC||74,346||17,110||Colum Eastwood||12.4||82.0||5.5|
|Lagan Valley CC||75,735||6,499||Jeffrey Donaldson||64.9||6.3||28.8|
|Mid Ulster CC||70,449||9,537||Francie Molloy||30.4||60.2||9.4|
|Newry & Armagh CC||81,226||9,287||Mickey Brady||30.0||61.8||8.3|
|North Antrim CC||77,134||12,721||Ian Paisley, Jr.||65.9||19.5||14.7|
|North Down CC||67,099||2,968||Stephen Farry||45.2||0.0||54.8|
|South Antrim CC||71,711||2,689||Paul Girvan||64.3||16.7||19.1|
|South Down CC||79,175||1,620||Chris Hazzard||21.9||64.1||13.9|
|Strangford CC||66,928||7,071||Jim Shannon||62.6||6.8||30.5|
|Upper Bann CC||82,887||8,210||Carla Lockhart||53.4||33.8||12.9|
|West Tyrone CC||66,259||7,478||Órfhlaith Begley||28.7||60.4||11.0|
- BC denotes borough constituency, CC denotes county constituency.
- The majority is the number of votes the winning candidate receives more than their nearest rival.
Historical representation by party
Where a cell is marked → (with a different colour of frame to the preceding cell) it indicates that the previous MP continued to sit under a new party affiliation. Changes are dated in the header row: either a general election (four-figure year, bold, link) or by-election or change in affiliation (two-figure year, italic, link or details appear on hover).
1801 to 1832 (22 MPs)
* Sir George Hill, 2nd Baronet, was elected to sit as MP for both Coleraine and Londonderry City in the 1806 general election and chose to continue to sit for Londonderry City, hence the 1807 by-election, in which Walter Jones was restored to his seat.
* Charles Brownlow was initially elected as a Tory but at some point changed his affiliation to sit with the Whigs.
|Savage||Ward||R Stewart||Forde||F Stewart|
|Downpatrick||C Rowley||SC Rowley||Hawthorne||Ruthven*||Croker||Hawthorne||Annesley||Maxwell||Ruthven|
* The Parliaments of England by Henry Stooks Smith suggests that after the 1806 election there was a petition, which led to Edward Southwell Ruthven (Whig) being unseated and John Wilson Croker (Tory) being declared duly elected. Parliamentary Election Results in Ireland, 1801–1922, edited by BM Walker, does not make any reference to such a petition.
|Fermanagh||Archdall snr||Archdall jnr|
|JW Cole||GL Cole||Lowry-Corry||WW Cole|
1832 to 1885 (29 MPs)
|Antrim||J. O'Neill||Alexander||E. Pakenham|
|G. Chichester||Irving||H. B. Seymour||E. C. Macnaghten||Macartney|
|Belfast||A. Chichester||McCance||Dunbar||Gibson||J. Tennent||R. Tennent||Davison|
|J. Tennent||→||G. Chichester||Dunbar||Johnson||A. Chichester||→||Cairns|
|Carrickfergus||C. Dobbs||Kirk||Stapleton-Cotton||W. Dobbs|
|Lisburn||Meynell||H. B. Seymour||J. Tennent||Smyth||Richardson|
|Antrim||T. Pakenham||G. H. Seymour||H. Seymour||Chaine||Sinclair|
|Upton||E. O'Neill||E. MacNaghten|
|R. Bateson||R. Bateson jnr||T. Bateson||Clark|
*unseated on petition
|Dungannon||J. Knox||T. Knox||T. Knox jnr||W. Knox||T. Dickson||J. Dickson|
|Tyrone||H. T. Lowry Corry||→||→||H. W. Lowry Corry||Litton||T. Dickson|
|Verner||W. Verner jnr||E. Verner||Richardson|
|Newry||Hill||Brady||Ellis||F. J. Needham||→||Hallewell||Kirk||Quinn||Innes||Kirk||F. C. Needham||Whitworth||Thomson|
|Enniskillen||A. Cole||H. Cole||Whiteside||J. Cole||Crichton||L. Cole|
|Fermanagh||Archdall||M. Archdale||W. Archdale|
|W. Cole||Brooke||H. Cole||Crichton|
1885 to 1918 (25 MPs)
Conservative Party Irish Unionist then Ulster Unionist Irish Parliamentary Party (1885-90, 1900-22) / Irish National League (1890-1900) Irish National Federation Healyite Nationalist Nationalist Party
|Constituency||1885||86||1886||91||1892||1895||00||1900||1906||06||09||Jan 1910||Dec 1910||17||18|
|South Armagh||Blane||McHugh||J. Campbell||McKillop||O'Neill||Donnelly|
Conservative Party Irish Unionist then Ulster Unionist Independent Unionist Liberal Unionist Irish Parliamentary Party (1885-90, 1900-22) / Irish National League (1890-1900) Irish National Federation Nationalist Party Labour Unionist
|Constituency||1885||1886||1892||1895||98||1900||03||1906||Jan 1910||Dec 1910||16|
|South Fermanagh||H. Campbell||McGilligan||Jordan||→||Crumley|
|Constituency||1885||1886||1892||1895||99||1900||1906||Jan 1910||Dec 1910||13||14||16|
|Londonderry City||Lewis||J. McCarthy||Ross||Knox||Moore||Hamilton||Hogg||Dougherty|
Conservative Party Irish Unionist then Ulster Unionist Russellite Unionist Liberal Unionist Liberal Party Irish Parliamentary Party (1885-90, 1900-22) / Irish National League (1890-1900) Irish National Federation Nationalist Party
1918 to 1922 (30 MPs)
1922 to 1950 (13 MPs)
|Fermanagh and Tyrone
|Queen's University of Belfast||Whitla||Sinclair||Savory|
1950 to 1983 (12 MPs)
Ulster Unionist Protestant Unionist (pre-1971) / Democratic Unionist (post-1971) Vanguard Unionist / United Ulster Unionist (Mid Ulster, 1975-83) Conservative Party Independent Unionist Ulster Popular Unionist
- The constituency was won by Philip Clarke of Sinn Féin, but he was unseated on petition on the basis that his criminal conviction (for Irish Republican Army activity) made him ineligible. Instead, the seat was awarded to the Ulster Unionist Party (UUP) candidate.
- The seat was originally won by Tom Mitchell of Sinn Féin, but Mitchell was subsequently unseated upon petition, on the grounds that his terrorist convictions made him ineligible to sit in Parliament. The seat was awarded to Charles Beattie of the UUP. However, Beattie in turn was also found ineligible to sit due to holding an office of profit under the crown, triggering a further by-election.
- Original winner of the 1950 election in that seat, James Godfrey MacManaway (UUP), disqualified due to being a clergyman. Teevan won the subsequent by-election
1983 to present (17, then 18 MPs)
1Paisley Jr was suspended from the DUP between July and November 2018.
Proposed boundary changes
The Boundary Commission for Northern Ireland submitted their final proposals in respect of the Sixth Periodic Review of Westminster Constituencies (the 2018 review) in September 2018. Although the proposals were immediately laid before Parliament they were not brought forward by the Government for approval. Accordingly, they did not come into effect for the 2019 election which took place on 12 December 2019, and which was contested using the constituency boundaries in place since 2010.
Under the terms of the Parliamentary Voting System and Constituencies Act 2011, the Sixth Review was based on reducing the total number of MPs from 650 to 600 and a strict electoral parity requirement that the electorate of all constituencies should be within a range of 5% either side of the electoral quota.
On 24 March 2020, the Minister of State for the Cabinet Office, Chloe Smith, issued a written statement to Parliament setting out the Government's thinking with regard to parliamentary boundaries. Subsequently, the Parliamentary Constituencies Act 2020 was passed into law on 14 December 2020. This formally removed the duty to implement the 2018 review and set out the framework for future boundary reviews. The Act provided that the number of constituencies should remain at the current level of 650, rather than being reduced to 600, while retaining the requirement that the electorate should be no more than +/- 5% from the electoral quota.
The Act specified that the next review should be completed no later than 1 July 2023 and the Boundary Commission formally launched the 2023 Review on 5 January 2021. The Commission have calculated that the number of seats to be allocated to Northern Ireland will be unchanged, at 18.
See 2023 Periodic Review of Westminster constituencies for further details.
- List of changes to constituency boundaries: section 6 of Parliamentary constituency boundaries: the Fifth Periodical Review House of Commons Library
- "FAQs". Boundary Commission for Northern Ireland. Archived from the original on 1 April 2014. Retrieved 10 April 2014.
- "Assembly Members (Reduction of Numbers) Act (Northern Ireland) 2016". Retrieved 4 March 2017.
- "House Of Commons Library 2017 Election report" (PDF). House Of Commons Library. 7 April 2018.
- Uberoi, Elise; White, Isobel (25 February 2016). "Constituency boundary reviews and the number of MPs". Cite journal requires
- White, Isobel (28 July 2010). "Parliamentary constituency boundaries: the Fifth Periodical Review". Cite journal requires
- Whyte, Dr Nicholas. "Westminster election February 1974". www.ark.ac.uk. Retrieved 8 April 2018.