Northern Ireland is divided into 18 parliamentary constituencies: 4 borough constituencies in Belfast and 14 county constituencies elsewhere. 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.
Constituencies
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.
- Belfast East
- Belfast North
- Belfast South and Mid Down
- Belfast West
- East Antrim
- East Londonderry
- Fermanagh and South Tyrone
- Foyle
- Lagan Valley
- Mid Ulster
- Newry and Armagh
- North Antrim
- North Down
- South Antrim
- South Down
- Strangford
- Upper Bann
- West Tyrone
center|frameless|615x615px
2024 general election
{| class="wikitable sortable"
|-
!rowspan=1|Name
!rowspan=1|Electorate
!rowspan=1|Majority
!colspan=2 class=unsortable|MP
!rowspan=1|Unionist %
!rowspan=1|Nationalist %
!rowspan=1|Other %
!rowspan=1 class=unsortable|Map
|-
|Belfast East BC
| 72,917
| 2,676
| bgcolor="" |
| Gavin Robinson
|55.4
|1.4
|43.2
|left|100px|alt=A very small constituency, located in the east of the country.
|-
|Belfast North BC
| 74,240
| 5,612
| bgcolor=|
| John Finucane
|36.9
|49.5
|13.6
|left|100px|alt=A very small constituency, located in the east of the country
|-
|Belfast South & Mid Down BC
| 74,749
| 12,506
| bgcolor="" |
| Claire Hanna
|27.0
|49.1
|23.9
|left|100px|alt=A very small constituency, located in the East of the country.
|-
|Belfast West BC
| 75,346
| 15,961
| bgcolor=|
| Paul Maskey
|17.1
|78.8
|4.2
|left|100px|alt=A very small constituency, located in the East of the country.
|-
|East Antrim CC
| 73,302
| 1,306
| bgcolor="" |
| Sammy Wilson
|63.2
|9.7
|27.0
|left|100px|alt=A medium-sized constituency, located in the East of the country.
|-
|East Londonderry CC
| 75,707
| 179
| bgcolor="" |
| Gregory Campbell
|47.3
|42.6
|10.1
|left|100px|alt=A fairly large constituency, located in the north of the country.
|-
|Fermanagh & South Tyrone CC
| 77,828
| 4,571
| bgcolor=|
| Pat Cullen
|39.7
|54.3
|5.9
|left|100px|alt=A very large constituency, comprising the southwest area of the country.
|-
|Foyle CC
| 73,496
| 4,166
| bgcolor="" |
| Colum Eastwood
|13.9
|78.8
|7.3
|left|100px|alt=A medium-sized constituency found in the south east of the county.
|-
|Lagan Valley CC
| 82,201
| 2,959
| bgcolor="" |
| Sorcha Eastwood
|59.1
|2.1
|38.8
|left|100px|alt=A medium constituency located inland, in the southeast of the country.
|-
|Mid Ulster CC
| 74,000
| 14,923
| bgcolor=|
| Cathal Mallaghan
|31.8
|63.5
|4.8
|left|100px|alt=A medium constituency, located slightly to the north and west of the centre of the country.
|-
|Newry & Armagh CC
| 78,244
| 15,493
| bgcolor=|
| Dáire Hughes
|28.8
|65.2
|5.9
|left|100px|alt=A medium constituency in the south of the country.
|-
|North Antrim CC
| 74,697
| 450
| bgcolor="" |
| Jim Allister
|65.0
|23.8
|11.2
|left|100px|alt=A large constituency in the north of the county.
|-
|North Down CC
| 73,885
| 7,305
| bgcolor="" |
| Alex Easton
|63.9
|1.5
|34.6
|left|100px|alt=A medium-sized constituency found in the south east of the county.
|-
|South Antrim CC
| 77,058
| 7,512
| bgcolor="" |
| Robin Swann
|64.8
|23.3
|12.0
|left|100px|alt=A medium constituency located in the east of the county.
|-
|South Down CC
| 76,248
| 9,280
| bgcolor=|
| Chris Hazzard
|23.6
|68.3
|8.0
|left|100px|alt=A medium constituency located in the south-east of the county.
|-
|Strangford CC
| 74,525
| 5,131
| bgcolor="" |
| Jim Shannon
|58.6
|11.8
|29.7
|left|100px|alt=A medium constituency located in the south-east of the county.
|-
|Upper Bann CC
| 81,249
| 7,406
| bgcolor="" |
| Carla Lockhart
|53.4
|33.3
|13.3
|left|100px|alt=A medium constituency in the centre of the county.
|-
|West Tyrone CC
| 74,269
| 15,917
| bgcolor=|
| Órfhlaith Begley
|27.6
|67.1
|5.2
|left|100px|alt=A medium-sized constituency found in the west of the county.
|}
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)
Antrim
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1801
! 1802
! 1806
! style="font-weight: normal;" | 07
! 1807
! 1812
! style="font-weight: normal;" | 14
! style="font-weight: normal;" | 16
! 1818
! style="font-weight: normal;" | 19
! 1820
! style="font-weight: normal;" | 22
! 1826
! 1830
! 1831
|-
| rowspan="2" | Antrim
| style="padding: 1px 2px;" | Staples
| colspan="14" style="" | O'Neill
|-
| colspan="5" style="" | MacNaghten
| colspan="3" style="" | F. Seymour-Conway
| colspan="3" style="" | H. H. Seymour
| style="" | R. Seymour-Conway
| style="" | MacNaghten
| style="" | G. Chichester
| style="" | →
|-
| Belfast
| colspan="6" style="" | J. May
| style="" | S. May
| style="" | Michel
| colspan="2" style="" | A. Chichester
| colspan="3" style="" | G. Chichester
| colspan="2" style="" | A. Chichester
|-
| Carrickfergus
| style="padding: 1px 2px;" | Dalway
| colspan="2" style="" | S. Chichester
| colspan="2" style="" | Craig
| colspan="3" style="" | A. Chichester
| colspan="2" style="" | G. Chichester
| colspan="3" style="" | A. Chichester
| colspan="2" style="" | Hill
|-
| Lisburn
| style="" | Hatton
| colspan="4" style="" | F. Seymour-Conway
| colspan="3" style="" | Moore
| style="" | Foster
| colspan="3" style="" | H. B. Seymour
| colspan="3" style="" | Meynell
|}
Londonderry
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1801
! style="font-weight: normal;" | 01
! 1802
! 1806
! style="font-weight: normal;" | 07
! 1807
! style="font-weight: normal;" | 09
! 1812
! style="font-weight: normal;" | '
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 15
! 1818
! 1820
! style="font-weight: normal;" | 23
! 1826
! 1830
! 1831
! style="font-weight: normal;" | 31
|-
| Coleraine
| colspan="3" style="" | W. Jones
| style="" | *
| colspan="2" style="" | W. Jones
| style="" | J. Beresford
| style=""| G. Beresford
| colspan="5" style="" | J. Beresford
| colspan="4" style="" | Brydges
| style="" | Copeland
|-
| Londonderry City
| colspan="2" style="" | Alexander
| colspan="13" style="" | Hill*
| colspan="3" style="" | Ferguson
|-
| rowspan="2" | County Londonderry
| colspan="9" style="" | C. Stewart
| colspan="2" style="" | A. Stewart
| colspan="4" style="" | A. R. Stewart
| colspan="3" style="" | T. Jones
|-
| style="background: white;" | vacant
| style="" | Hill
| colspan="5" style="" | G. Beresford
| colspan="3" style="" | Ponsonby
| colspan="5" style="" | Dawson
| colspan="3" style="" | Bateson
|}
<nowiki>*</nowiki> 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.
Tyrone
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1801
! style="font-weight: normal;" | 01
! style="font-weight: normal;" | 02
! 1802
! style="font-weight: normal;" | 03
! 1806
! style="font-weight: normal;" | 07
! 1807
! style="font-weight: normal;" | 09
! 1812
! 1818
! 1820
! style="font-weight: normal;" | 25
! 1826
! 1830
! 1831
|-
| Dungannon
| J. Knox
| colspan="2" style="" | C. Hamilton
| style="" | *
| style="" | C. Hamilton
| style="" | *
| style="" |
|
| Scott
| Holford
| colspan="4" style="" | T. Knox jnr
| colspan="2" style="" | J. J. Knox
|-
| rowspan="2" | Tyrone
| colspan="2" style="" | Lowry-Corry
| colspan="3" style="" | John Stewart
| colspan="4" style="" | T. Knox snr
| colspan="3" style="" | John Stewart
| colspan="4" style="" | H. Lowry-Corry
|-
| colspan="9" | James Stewart
| style="" |
| colspan="4" style="" | W. Stewart
| colspan="2" style="" | H. Stewart
|}
<nowiki>*</nowiki> At both the 1802 and 1806 elections, George Knox was returned for both Dungannon and Dublin University and chose to sit for the university seat.
Armagh
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1801
! 1802
! 1806
! 1807
! 1812
! style="font-weight: normal;" | 15
! style="font-weight: normal;" | 16
! 1818
! style="font-weight: normal;" | 19
! 1820
! 1826
! 1830
! 1831
! style="font-weight: normal;" | 31
|-
| Armagh
| colspan="6" style="" | Duigenan
| style="" | Webber
| colspan="2" style="" | Foster
| style="" | Stuart
| colspan="2" style="" | Goulburn
| style="" | Chetwynd-Talbot
| style="" | Brydges
|-
| rowspan="2" | County Armagh
| colspan="3" style="" | Acheson snr
| colspan="6" style="" | Richardson
| colspan="2" style="" | Caulfeild
| colspan="3" style="" | Acheson jnr
|-
| Cope
| colspan="2" style="" | Caulfeild
| colspan="2" style="" | W Brownlow
| colspan="2" style="" | Caulfeild
| colspan="7" style="" | C Brownlow*
|-
| Newry
| Moore
| style="" | Corry
| colspan="6" style="" | F Needham
| colspan="2" style="" | FJ Needham
| colspan="4" style="" | Knox
|}
<nowiki>*</nowiki> Charles Brownlow was initially elected as a Tory but at some point changed his affiliation to sit with the Whigs.
Down
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1801
! style="font-weight: normal;" | 01
! 1802
! style="font-weight: normal;" | 05
! 1806
! 1807
! style="font-weight: normal;" | 12
! 1812
! style="font-weight: normal;" | 15
! style="font-weight: normal;" | 17
! 1818
! 1820
! style="font-weight: normal;" | 21
! 1826
! 1830
! 1831
|-
| rowspan="2" | Down
| colspan="3" style="" | R Stewart
| colspan="6" style="padding: 1px 2px;" | Meade
| colspan="7" style="" | Hill
|-
| colspan="5" style="padding: 1px 2px;" | Savage
| colspan="1" style="padding: 1px 2px;" | Ward
| colspan="6" style="" | R Stewart
| colspan="1" style="" | Forde
| colspan="3" style="" | F Stewart
|-
| Downpatrick
| colspan="1" style="padding: 1px 2px;" | C Rowley
| colspan="1" style="padding: 1px 2px;" | SC Rowley
| colspan="2" style="padding: 1px 2px;" | Hawthorne
| colspan="1" style="" | Ruthven*
| colspan="2" style="" | Croker
| colspan="1" style="" | Hawthorne
| colspan="3" style="" | Annesley
| colspan="3" style="" | Maxwell
| colspan="2" style="" | Ruthven
|}
<nowiki>*</nowiki> 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
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1801
! 1802
! style="font-weight: normal;" | 02
! style="font-weight: normal;" | 03
! style="font-weight: normal;" | 06
! style="font-weight: normal;" | 06
! 1806
! style="font-weight: normal;" | 07
! 1807
! 1812
! 1818
! 1820
! style="font-weight: normal;" | 23
! 1826
! style="font-weight: normal;" | 28
! 1830
! 1831
|-
| Enniskillen
| style="" | Hamilton
| style="" | Beresford
| colspan="2" style="" | Burroughs
| style="" | King
| style="" | Fremantle
| style="" | Sneyd
| style="" | Bennet
| style="" | Pochin
| colspan="5" style="" | Magenis
| colspan="3" style="" | AH Cole
|-
| rowspan="2" | Fermanagh
| style="" | Archdall snr
| colspan="16" style="" | Archdall jnr
|-
| colspan="3" style="" | JW Cole
| colspan="9" style="" | GL Cole
| colspan="4" style="" | Lowry-Corry
| style="" |
|}
1832 to 1885 (29 MPs)
Antrim
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1832
! 1835
! style="font-weight: normal;" | 35
! 1837
! style="font-weight: normal;" | 38
! style="font-weight: normal;" | 41
! 1841
! style="font-weight: normal;" | 45
! style="font-weight: normal;" | 45
! 1847
! style="font-weight: normal;" | 52
! 1852
! style="font-weight: normal;" | 52
! style="font-weight: normal;" | 53
! 1857
|-
| rowspan="2" | Antrim
| colspan="5" style="" | J. O'Neill
| colspan="6" style="" | Alexander
| colspan="4" style="" | E. Pakenham
|-
| colspan="3" style="" | G. Chichester
| colspan="5" style="" | Irving
| style="" | H. B. Seymour
| colspan="2" style="" | E. C. Macnaghten
| colspan="4" style="" | Macartney
|-
| rowspan="2" | Belfast
| style="" | A. Chichester
| style="" | McCance
| style="" | Dunbar
| style="" | Gibson
| colspan="5" style="" | J. Tennent
| colspan="2" style="" | R. Tennent
| colspan="4" style="" | Davison
|-
| style="" | J. Tennent
| colspan="2" style="" | →
| style="" | G. Chichester
| colspan="2" style="" | Dunbar
| style="" |Johnson
| colspan="2" style="" | A. Chichester
| colspan="2" style="" | →
| colspan="4" style="" | Cairns
|-
| Carrickfergus
| style="" | C. Dobbs
| colspan="8" style="" | Kirk
| colspan="5" style="" | Stapleton-Cotton
| style="" | W. Dobbs
|-
| Lisburn
| colspan="9" style="" | Meynell
| style="" | H. B. Seymour
| colspan="2" style="" | J. Tennent
| style="" | Smyth
| colspan="2" style="" | Richardson
|}
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1859
! style="font-weight: normal;" | 60
! style="font-weight: normal;" | 63
! style="font-weight: normal;" | 63
! 1865
! style="font-weight: normal;" | 66
! 1868
! style="font-weight: normal;" | 69
! style="font-weight: normal;" | 73
! 1874
! style="font-weight: normal;" | 78
! 1880
! style="font-weight: normal;" | 85
|-
| rowspan="2" |Antrim
| colspan="4" style="" |T. Pakenham
| colspan="3" style="" |G. H. Seymour
| colspan="2" style="" |H. Seymour
| colspan="3" style="" |Chaine
| style="" |Sinclair
|-
| colspan="2" style="" |Upton
| colspan="9" style="" |E. O'Neill
| colspan="2" style="" |E. MacNaghten
|-
| rowspan="2" |Belfast
|style=""|Davison
| colspan="5" style="" |Getty
| colspan="4" style="" |Johnston
| colspan="3" style="" |Ewart
|-
| colspan="5" style=""|Cairns
| style="" |Lanyon
| colspan="3" style="" |McClure
| colspan="4" style="" |Corry
|-
|Carrickfergus
| colspan="6" style="" |Torrens
| colspan="5" style="" |Dalway
| colspan="2" style="" |Greer
|-
|Lisburn
| colspan="2" style="" |Richardson
| style="" |Barbour
| colspan="5" style="" |Verner
| colspan="5" style="" |Wallace
|}
Londonderry
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1832
! style="font-weight: normal;" | 33
! 1835
! 1837
! 1841
! style="font-weight: normal;" | 42
! style="font-weight: normal;" | 43
! style="font-weight: normal;" | 44
! 1847
! style="font-weight: normal;" | 52
! 1852
! 1857
! style="font-weight: normal;" | 57
|-
| Coleraine
| style="" |Beresford*
| colspan="2" style=""|Copeland
| colspan="3" style="" |Litton
| colspan="3" style=""|Boyd
| colspan="2" style=""|Naas
| colspan="2" style="" |Boyd
|-
| Londonderry City
| colspan="13" style="" |Ferguson
|-
| rowspan="2" | County Londonderry
| colspan="12" style="" | Jones
| style="" | Greer
|-
| colspan="5" style="" | R. Bateson
| colspan="2" style="" | R. Bateson jnr
| colspan="4" style="" | T. Bateson
| colspan="2" style="" | Clark
|}
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1859
! style="font-weight: normal;" | 60
! style="font-weight: normal;" | 62
! 1865
! 1868
! style="font-weight: normal;" | 72
! 1874
! style="font-weight: normal;" | 78
! 1880
! style="font-weight: normal;" | 81
! style="font-weight: normal;" | 84
|-
| Coleraine
| colspan="2" style="" |Boyd
| colspan="4" style=""|Bruce
| colspan="2" style="" |Taylor
| colspan="4" style="" |Bruce
|-
| Londonderry City
| style="" | Ferguson
| colspan="2" style="" | McCormick
| style="" | Hamilton
| style="" | Dowse
| colspan="6" style="" | Lewis
|-
| rowspan="2" | County Londonderry
| colspan="6" style="" | Dawson
| style="" | Smyth
| colspan="4" style="" | McClure
|-
| colspan="6" style="" |Heygate
| colspan="3" style="" | Law
| style="" | Porter
| style="" | Walker
|}
<nowiki>*</nowiki>unseated on petition
Tyrone
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
!Constituency
!1832
!1835
!1837
! style="font-weight: normal;" | 38
! style="font-weight: normal;" | 39
!1841
!1847
! style="font-weight: normal;" | 51
!1852
!1857
!1859
!1865
!1868
! style="font-weight: normal;" | 73
!1874
!1880
! style="font-weight: normal;" | 80
! style="font-weight: normal;" | 81
|-
|Dungannon
| colspan="2" style="" |J. Knox
| style="" |T. Knox
| colspan="4" style=""|T. Knox jnr
| colspan="7" style=""|W. Knox
| colspan="2" style="" |T. Dickson
| colspan="2" style=""|J. Dickson
|-
| rowspan="2" |Tyrone
| colspan="6" style="" |H. T. Lowry Corry
| colspan="2" style="" |→
| colspan="5" style="" |→
| colspan="2" style=""|H. W. Lowry Corry
| colspan="2" style="" |Litton
|style=""|T. Dickson
|-
| style="" |Stewart
| style="" |Hamilton
| colspan="2" style="" |Alexander
| colspan="2" style=""|Hamilton
| colspan="2" style="" |→
| colspan="6" style="" |→
| colspan="4" style="" |Ellison-Macartney
|}
Armagh
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
!Constituency
!1832
!1835
!1837
! style="font-weight: normal;" | 40
!1841
!1847
! style="font-weight: normal;" | 51
!1852
! style="font-weight: normal;" | 55
!1857
!1859
! style="font-weight: normal;" | 64
!1865
! style="font-weight: normal;" | 67
!1868
! style="font-weight: normal;" | 71
! style="font-weight: normal;" | 73
!1874
! style="font-weight: normal;" | 75
!1880
|-
|Armagh
| colspan="2" style="" |Dobbin
| style="" |Curry
| colspan="4" style=""|Rawdon
| style="" |Moore
|style=""|Bond
| style="" |Miller
| colspan="2" style="" |Bond
| style="" |Miller
| colspan="5" style=""|Vance
| colspan="2" style=""|Beresford
|-
| rowspan="2" |County Armagh
| colspan="5" style="" |Acheson
| colspan="4" style="" |Caulfeild
| colspan="2" style="" |Close
| colspan="6" style=""|Stronge
| colspan="3" style="" |Close
|-
| colspan="14" style="" |Verner
| colspan="2" style="" |W. Verner jnr
| colspan="3" style=""|E. Verner
| style="" |Richardson
|-
|Newry
| style="" |Hill
| style="" |Brady
| colspan="2" style="" |Ellis
| style="" |F. J. Needham
| style="" |→
|style=""|Hallewell
| colspan="3" style="" |Kirk
| colspan="2" style="" |Quinn
| colspan="2" style="" |Innes
| style="" |Kirk
| colspan="2" style=""|F. C. Needham
| colspan="2" style="" |Whitworth
| style="" |Thomson
|}
Down
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1832
! 1835
! style="font-weight: normal;" | 36
! 1837
! 1841
! style="font-weight: normal;" | 45
! 1847
! style="font-weight: normal;" | 51
! 1852
! 1857
! 1859
! 1865
! style="font-weight: normal;" | 67
! 1868
! 1874
! style="font-weight: normal;" | 78
! 1880
! style="font-weight: normal;" | 84
|-
| rowspan="2" | Down
| colspan="2" style="" | A. M. Hill
| colspan="3" style=""| A. W. B. Hill
| colspan="11" style=""| Hill-Trevor
| colspan="2" style="" | A. W. Hill
|-
| colspan="8" style="" | Stewart
| style="" | D. S. Ker
| colspan="5" style="" | Forde
| style="" | Crawford
| colspan="2" style=""| Vane-Tempest-Stewart
| style=""| R. W. Ker
|-
| Downpatrick
| style="" | Maxwell
| colspan="3" style="" | D. Ker
| colspan="2" style="" | D. S. Ker
| style="" | R. Ker
| colspan="2" style="" | Hardinge
| style="" | R. Ker
| colspan="2" style="" | D. S. Ker
| colspan="2" style="" | Keown
| colspan="4" style="" | Mulholland
|}
Fermanagh
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1832
! style="font-weight: normal;" | 34
! 1835
! 1837
! style="font-weight: normal;" | 40
! 1841
! style="font-weight: normal;" | 44
! 1847
! style="font-weight: normal;" | 51
! 1852
! style="font-weight: normal;" | 54
! 1857
! style="font-weight: normal;" | 59
! 1859
! 1865
! 1868
! 1874
! 1880
|-
| Enniskillen
| colspan="6" style="" | A. Cole
| colspan="2" style="" | H. Cole
| colspan="4" style="" | Whiteside
| colspan="3" style="" | J. Cole
| colspan="2" style="" | Crichton
| style="" | L. Cole
|-
| rowspan="2" | Fermanagh
| style="" | Archdall
| colspan="15" | M. Archdale
| colspan="2" style="" | W. Archdale
|-
| colspan="4" style="" | W. Cole
| colspan="6" style="" | Brooke
| colspan="7" style="" | H. Cole
| style="" | Crichton
|}
1885 to 1918 (25 MPs)
Antrim
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1885
! 1886
! style="font-weight: normal;" | 87
! 1892
! 1895
! style="font-weight: normal;" | 99
! 1900
! style="font-weight: normal;" | 03
! 1906
! Jan 1910
! Dec 1910
! style="font-weight: normal;" | 13
! style="font-weight: normal;" | 15
|-
| East Antrim
| style="" | J. McCalmont
| colspan="10" style="" | →
| colspan="2" style="" | R. McCalmont
|-
| Mid Antrim
| style="" | R. O'Neill
| colspan="8" style="" | →
| colspan="3" style="" | A. O'Neill
| style="" | H. O'Neill
|-
| North Antrim
| style="" | Macnaghten
| style="" | →
| style="" | Lewis
| style="" |Connor
| style="" | H. McCalmont
| colspan="3" style="" | Moore
| style="" | Glendinning
| colspan="4" style="" | Kerr-Smiley
|-
| South Antrim
| style="" | Ellison-Macartney
| colspan="6" style="" | →
| colspan="6" style="" | Craig
|}
Armagh
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1885
! style="font-weight: normal;" | 86
! 1886
! style="font-weight: normal;" | 91
! 1892
! 1895
! style="font-weight: normal;" | 00
! 1900
! 1906
! style="font-weight: normal;" | 06
! style="font-weight: normal;" | 09
! Jan 1910
! Dec 1910
! style="font-weight: normal;" | 17
! style="font-weight: normal;" | 18
|-
| Mid Armagh
| style="" | McKane
| style="" | Corry
| style="" | →
| colspan="3" style="" | Barton
| colspan="8" style="" | Lonsdale
| style="" | Lonsdale
|-
| North Armagh
| colspan="2" style="" | Saunderson
| colspan="7" style="" | →
| colspan="4" style="" | Moore
| colspan="2" style="" | Allen
|-
| South Armagh
| colspan="4" style="" | Blane
| colspan="3" style="" | McHugh
| style="" | J. Campbell
| colspan="2" style="" | McKillop
| colspan="4" style="" |O'Neill
| style="" | Donnelly
|}
Belfast
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1885
! 1886
! style="font-weight: normal;" | 89
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 92
! 1892
! 1895
! style="font-weight: normal;" | 96
! 1900
! style="font-weight: normal;" | 02
! style="font-weight: normal;" | 05
! 1906
! style="font-weight: normal;" | 07
! Jan 1910
! Dec 1910
! style="font-weight: normal;" | 14
! style="font-weight: normal;" | Apr 17
! style="font-weight: normal;" | Jul 17
|-
| Belfast East
| style="" | de Cobain
| colspan="3" style="" | →
| colspan="10" style="" | Wolff
| style="" | McMordie
| colspan="3" style="" | Sharman-Crawford
|-
| Belfast North
| colspan="2" style="" | Ewart
| colspan="2" style="" | Harland
| colspan="3" style="" | →
| colspan="3" style="" | Haslett
| colspan="2" style="" | Dixon
| style="" | Clark
| colspan="5" style="" | Thompson
|-
| Belfast South
| style="" | Johnston
| colspan="3" style="" | →
| colspan="5" style="" | →
| colspan="4" style="" | Sloan
| colspan="4" style="" | Chambers
| style="" | Lindsay
|-
| Belfast West
| style="" | Haslett
| colspan="2" style="" | Sexton
| colspan="2" style="" | →
| colspan="6" style="" | Arnold-Forster
| colspan="7" style="" | Devlin
|}
Down
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1885
! 1886
! style="font-weight: normal;" | 90
! 1892
! 1895
! style="font-weight: normal;" | '
! 1900
! style="font-weight: normal;" | 02
! style="font-weight: normal;" | 05
! 1906
! style="font-weight: normal;" | 07
! style="font-weight: normal;" | 08
! Jan 1910
! style="font-weight: normal;" | 10
! Dec 1910
|-
| East Down
| style="" | Ker
| style="" | →
| colspan="5" style="" | Rentoul
| colspan="2" style="" | Wood
| colspan="6" style="" | Craig
|-
| North Down
| style="" | Waring
| colspan="4" style="" | →
| style="" | Blakiston-Houston
| colspan="7" style="" | Corbett
| colspan="2" style="" | Mitchell-Thomson
|-
| South Down
| style="" | Small
| colspan="2" style="" | McCartan
| colspan="3" style="" | →
| style="" | →
| colspan="8" style="" | McVeagh
|-
| West Down
| style="" | A. W. Hill
| colspan="4" style="" | →
| colspan="3" style="" | A. Hill
| colspan="2" style="" | Liddell
| style="" | A. W. Hill
| colspan="4" style="" | MacCaw
|-
| Newry
| colspan="3" style="" | J. H. McCarthy
| colspan="3" style="" | Carvill
| colspan="3" style="" | →
| colspan="6" style="" | Mooney
|}
Fermanagh
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1885
! 1886
! 1892
! 1895
! style="font-weight: normal;" | 98
! 1900
! style="font-weight: normal;" | 03
! 1906
! Jan 1910
! Dec 1910
! style="font-weight: normal;" | 16
|-
| North Fermanagh
| colspan="2" style="" | Redmond
| colspan="2" style="" | Dane
| colspan="2" style="" | Archdale
| style="" | Mitchell
| colspan="3" style="" | Fetherstonhaugh
| style="" | Archdale
|-
| South Fermanagh
| colspan="2" style="" | H. Campbell
| style="" | McGilligan
| colspan="2" style="" | Jordan
| colspan="4" style="" | →
| colspan="2" style="" | Crumley
|}
Londonderry
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1885
! 1886
! style="font-weight:normal;" | '
! 1892
! 1895
! style="font-weight: normal;" | 99
! 1900
! 1906
! Jan 1910
! Dec 1910
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 13
! style="font-weight: normal;" | 14
! style="font-weight: normal;" | 16
|-
| Londonderry City
| style="" | Lewis
| colspan="2" style="" | J. McCarthy
| style="" | Ross
| style="" | Knox
| style="" | Moore
| colspan="5" style="" | Hamilton
| style="" | Hogg
| colspan="2" style="" | Dougherty
|-
| North Londonderry
| colspan="2" style="" | Mulholland
| colspan="2" style="" | →
| colspan="3" style="" | Atkinson
| colspan="7" style="" | Barrie
|-
| South Londonderry
| style="" | Healy
| colspan="5" style="" | Lea
| colspan="4" style="" | Gordon
| colspan="3" style=""| →
| style="" | Henry
|}
Tyrone
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1885
! 1886
! style="font-weight: normal;" | '
! style="font-weight: normal;" | '
! 1892
! 1895
! 1900
! style="font-weight: normal;" | 02
! 1906
! style="font-weight: normal;" | 06
! style="font-weight: normal;" | 07
! Jan 1910
! Dec 1910
! style="font-weight: normal;" | 11
! style="font-weight: normal;" | 16
! style="font-weight: normal;" | 18
|-
| East Tyrone
| colspan="2" style="" | Reynolds
| colspan="3" style="" | →
| style="" | Doogan
| colspan="3" style="" | →
| colspan="3" style="" | Kettle
| colspan="3" style="" | Redmond
| style="" | Harbison
|-
| Mid Tyrone
| colspan="3" style="" | Kenny
| colspan="2" style="" | →
| style="" | Murnaghan
| colspan="5" style="" | →
| style="" | Brunskill
| colspan="3" style="" | McGhee
|
|-
| North Tyrone
| colspan="4" style="" | E. Hamilton
| style="" | F. Hamilton
| colspan="3" style="" | Hemphill
| colspan="2" style="" | Dodd
| colspan="3" style="" | Barry
| colspan="3" style="" | Russell
|-
| South Tyrone
| style="" | O'Brien
| colspan="6" style="" | Russell
| colspan="3" style="" | →
| style="" | →
| colspan="3" style="" | Horner
| colspan="2" style="" | Coote
|}
1918 to 1922 (30 MPs)
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1918
! style="font-weight: normal;" | 19
! style="font-weight: normal;" | 19
! style="font-weight: normal;" | '
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 21
! style="font-weight: normal;" | 22
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 22
! style="font-weight: normal;" | 22
|-
| East Antrim
| colspan="2" style="" | R McCalmont
| colspan="8" style="" | Hanna
|-
| Mid Antrim
| colspan="10" style="" | H O'Neill
|-
| North Antrim
| colspan="10" style="" | Kerr-Smiley
|-
| South Antrim
| colspan="10" style="" | Craig
|-
| Mid Armagh
| colspan="3" style="" | Lonsdale
| colspan="7" style="" | Armstrong
|-
| North Armagh
| colspan="10" style="" | Allen
|-
| South Armagh
| colspan="10" style="" | Donnelly
|-
| Belfast Pottinger
| colspan="10" style="" | Dixon
|-
| Belfast Duncairn
| colspan="3" style="" | Carson
| colspan="7" style="" | McConnell
|-
| Belfast Cromac
| colspan="10" style="" | Lindsay
|-
| Belfast Falls
| colspan="10" style="" | Devlin
|-
| Belfast Ormeau
| colspan="10" style="" | Moles
|-
| Belfast Shankill
| colspan="10" style="" | McGuffin
|-
| Belfast St Anne's
| colspan="10" style="" | Burn
|-
| Belfast Victoria
| colspan="10" style="" | Donald
|-
| Belfast Woodvale
| colspan="10" style="" | Lynn
|-
| Queen's University
| colspan="10" style="" | Whitla
|-
! Constituency
! 1918
! style="font-weight: normal;" | 19
! style="font-weight: normal;" | 19
! style="font-weight: normal;" | '
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 21
! style="font-weight: normal;" | 22
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 22
! style="font-weight: normal;" | 22
|-
| East Down
| colspan="10" style="" | Reid
|-
| North Down
| colspan="7" style="" | Brown
| colspan="2" style="" | H Wilson
| style="" | Simms
|-
| South Down
| colspan="10" style="" | McVeagh
|-
| West Down
| colspan="4" style="" | D Wilson
| colspan="3" style="" | Wallace
| colspan="3" style="" | Hayes
|-
| Mid Down
| colspan="5" style="" | Craig
| colspan="6" style="" | Sharman-Crawford
|-
| North Fermanagh
| colspan="10" style="" | Archdale
|-
| South Fermanagh
| colspan="10" style="" | O'Μahony
|-
| Londonderry City
| colspan="10" style="" | MacNeill
|-
| North Londonderry
| style="" | Anderson
| colspan="7" style="" | Barrie
| colspan="2" style="" | Macnaghten
|-
| South Londonderry
| colspan="5" style="" | Henry
| style="" | Chichester
| colspan="4" style="" | Pain
|-
| Tyrone North-East
| colspan="10" style="" | Harbison
|-
| Tyrone North-West
| colspan="10" style="" | Griffith
|-
| South Tyrone
| colspan="10" style="" | Coote
|-
! Constituency
! 1918
! style="font-weight: normal;" | 19
! style="font-weight: normal;" | 19
! style="font-weight: normal;" | '
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 21
! style="font-weight: normal;" | 22
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 22
! style="font-weight: normal;" | 22
|}
1922 to 1950 (13 MPs)
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1922
! 1923
! 1924
! style="font-weight: normal;" | 29
! 1929
! style="font-weight: normal;" | '
! 1931
! style="font-weight: normal;" | 34
! 1935
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 39
! style="font-weight: normal;" | 40
! style="font-weight: normal;" | 43
! style="font-weight: normal;" | '
! 1945
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 48
! style="font-weight: normal;" | '
|-
| rowspan="2" | Antrim<br /><small>(Two members)</small>
| colspan="4" style="" | Craig
| colspan="8" style="" | McConnell
| colspan="2" style="" | Campbell
| colspan="4" style="" | Haughton
|-
| colspan="18" style="" | O'Neill
|-
| Armagh
| colspan="16" style="" | Allen
| colspan="2" style="" | Harden
|-
| Belfast East
| colspan="11" style="" | Dixon
| colspan="3" style="" | Harland
| colspan="4" style="" | Cole
|-
| Belfast North
| colspan="4" style="" | McConnell
| colspan="10" style="" | Somerset
| colspan="4" style="" | Neill
|-
| Belfast South
| colspan="4" style="" | Moles
| colspan="5" style="" | Stewart
| colspan="5" style="" | →
| colspan="4" style="" | Gage
|-
| Belfast West
| colspan="4" style="" | Lynn
| style="" | Allen
| style="" | →
| colspan="6" style="" | Browne
| style="" | Beattie
| colspan="2" style="" | →
| colspan="2" style="" | →
| style="" | →
|-
| rowspan="2" | Down<br /><small>(Two members)</small>
| colspan="10" style="" | Reid
| colspan="4" style="" | Little
| style="" | →
| colspan="3" style="" | Mullan
|-
| colspan="6" style="" | Simms
| colspan="8" style="" | Vane-Tempest-Stewart
| colspan="4" style="" | Smiles
|-
| rowspan="2" | Fermanagh and Tyrone<br /><small>(Two members)</small>
| colspan="2" style="" | Harbison
| colspan="2" style="" | Pringle
| style="" | Harbison
| colspan="3" style="" | Healy
| colspan="10" style="" | Cunningham
|-
| colspan="2" style="" | Healy
| colspan="2" style="" | Falls
| colspan="3" style="" | Devlin
| style="" | Stewart
| colspan="10" style="" | Mulvey
|-
| Londonderry
| colspan="3" style="" | Macnaghten
| colspan="15" style="" | Ross
|-
| Queen's University of Belfast
| style="" | Whitla
| colspan="10" style="" | Sinclair
| colspan="7" style="" | Savory
|}
1950 to 1983 (12 MPs)
Periodic boundary reviews commenced in 1947. The elections at which these were implemented are tagged with diamond suit characters, ♦.
<small>The 1st Periodic Review boundary map can be viewed on the ARK elections website. Changes in the 2nd review were relatively minor.</small>
{| class="wikitable"
! Unionist parties
|
|-
! Nationalist parties
|
|-
! Other
|
|}
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1950 ♦
! style="font-weight: normal;" | 51
! 1951
! style="font-weight: normal;" | 52
! style="font-weight: normal;" | 53
! style="font-weight: normal;" | 54
! 1955
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 59
! 1959
! style="font-weight: normal;" | 63
! 1964
! 1966
! style="font-weight: normal;" | 69
! 1970
! style="font-weight: normal;" | '
! style="font-weight: normal;" | '
! style="font-weight: normal;" | '
! style="font-weight: normal;" | '
! Feb 1974 ♦
! Oct 1974
! style="font-weight: normal;" | '
! style="font-weight: normal;" | '
! style="font-weight: normal;" | '
! 1979
! style="font-weight: normal;" | '
! style="font-weight: normal;" | 81
! style="font-weight: normal;" | 81
! style="font-weight: normal;" | '
|-
| Antrim N
| colspan="4" style="" |H. O'Neill
| colspan="5" style="" |P. O'Neill
| colspan="5" style="" |Clark
| colspan="2" style="" |Paisley
| colspan="13" style="" |→
|-
| Antrim S
| colspan="6" style="" |Savory
| colspan="8" style="" |Cunningham
| colspan="15" style="" |Molyneaux
|-
| Armagh
| colspan="5" style="" |Harden
| colspan="4" style="" |Armstrong
| colspan="10" style="" |Maginnis
| colspan="10" style="" |McCusker
|-
| Belfast E
| colspan="8" style="" |McKibbin
| colspan="11" style="" |McMaster
| colspan="4" style="" |Craig
| style="" |→
| colspan="5" style="" |Robinson
|-
| Belfast N
| colspan="9" style="" |Hyde
| colspan="8" style="" |Mills
| style="" |→
| style="" |→
| colspan="5" style="" |Carson
| colspan="5" style="" |McQuade
|-
| Belfast S
| colspan="3" style="" |Gage
| colspan="7" style="" |Campbell
| colspan="9" style="" |Pounder
| colspan="3" style="" |Bradford
| colspan="5" style="" |→
| colspan="2" style="" |Smyth
|-
| Belfast W
| colspan="2" style="" |Teevan<sup>3</sup>
| colspan="4" style="" |Beattie
| colspan="5" style="" |McLaughlin
| style="" |Kilfedder
| colspan="3" style="" |Fitt
| colspan="10" style="" |→
| colspan="4" style="" |→
|-
| Down N
| colspan="4" style="" |Smiles
| colspan="2" style="" |Ford
| colspan="8" style="" |Currie
| colspan="8" style="" |Kilfedder
| colspan="3" style="" |→
| colspan="4" style="" |→
|-
| Down S
| colspan="20" style="" |Orr
| colspan="9" style="" |Powell
|-
| Ferm. & S Tyr.
| colspan="6" style="" |Healy
| colspan="5" style="" | Grosvenor<sup>1</sup>
| colspan="3" style="" |Hamilton
| colspan="5" style="" |McManus
| style="" |West
| colspan="6" style="" |Maguire
| style="" |Sands
| style="" |Carron
| style=""|→
|-
| Londonderry
| style="" |Ross
| colspan="5" style="" |Wellwood
| colspan="13" style="" |Chichester-Clark
| colspan="10" style="" |Ross
|-
| Mid Ulster
| colspan="2" style="" |Mulvey
| colspan="4" style="" |O'Neill
| style="" | Forrest<sup>2</sup>
| colspan="6" style="" |→
| colspan="2" style="" |Devlin
| colspan="4" style="" |→
| colspan="2" style="" |Dunlop
| colspan="8" style="" |→
|}
Notes:
- 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)
<small>3rd and 4th Review boundary maps can be viewed on the ARK elections website: 1983, 1997.</small>
{| class="wikitable" style="border-collapse: separate; border-spacing: 0;"
! Constituency
! 1983 ♦
! style="font-weight: normal;" | 86
! 1987
! style="font-weight: normal;" | 90
! 1992
! style="font-weight: normal;" | 95
! 1997 ♦
! style="font-weight: normal;" | 00
! 2001
! style="font-weight: normal;" | '
! 2005
! style="font-weight: normal;" | '
! 2010 ♦
! style="font-weight: normal;" | 11
! style="font-weight: normal;" | 13
! 2015
! 2017
! style="font-weight: normal;" | 18
! 2019
! style="font-weight: normal;" | '
! 2024 ♦
|-
| style="padding: 1px 2px;" | Belfast East
| colspan="12" style="" | P Robinson
| colspan="3" style="" | Long
| colspan="6" style="" | G Robinson
|-
| style="padding: 1px 2px;" | Belfast North
| colspan="8" style="" | Walker
| colspan="10" style="" | Dodds
| colspan="3" style="" | Finucane
|-
| style="padding: 1px 2px;" | Belfast South
| colspan="10" style="" | Smyth<sup>1</sup>
| colspan="6" style="" | McDonnell
| colspan="2" style="" | Pengelly
| colspan="2" style="" | Hanna
|
|-
| colspan="21" style="padding: 1px 2px;" | Belfast South and Mid Down
| style="" | Hanna
|-
| style="padding: 1px 2px;" | Belfast West
| colspan="4" style="" | Adams
| colspan="2" style="" | Hendron
| colspan="7" style="" | Adams
| colspan="8" style="" | Maskey
|-
| style="padding: 1px 2px;" | East Antrim
| colspan="10" style="" | Beggs
| colspan="11" style="" | Wilson
|-
| style="padding: 1px 2px;" | East Londonderry
| colspan="8" style="" | Ross
| colspan="13" style="" | Campbell
|-
| style="padding: 1px 2px;" | Fermanagh & South Tyrone
| colspan="8" style="" | Maginnis
| colspan="7" style="" | Gildernew
| style="" | Elliott
| colspan="4" style="" | Gildernew
| style="" | Cullen
|-
| style="padding: 1px 2px;" | Foyle
| colspan="10" style="" | Hume
| colspan="6" style="" | Durkan
| colspan="2" style="" | McCallion
| colspan="3" style="" | C Eastwood
|-
| style="padding: 1px 2px;" | Lagan Valley
| colspan="6" style="" | Molyneaux
| colspan="3" style="" | Donaldson
| colspan="10" style="" | →
| style="" | →
| style="" | S Eastwood
|-
| style="padding: 1px 2px;" | Mid Ulster
| colspan="6" style="" | McCrea
| colspan="8" style="" | McGuinness
| colspan="6" style="" | Molloy
| style="" | Mallaghan
|-
| style="padding: 1px 2px;" | Newry & Armagh
| style="" | Nicholson
| colspan="9" style="" | Mallon
| colspan="5" style="" | Murphy
| colspan="5" style="" | Brady
| style="" | Hughes
|-
| style="padding: 1px 2px;" | North Antrim
| colspan="12" style="" | Paisley
| colspan="8" style="" | Paisley Jr<sup>1</sup>
| style="" | Allister
|-
| style="padding: 1px 2px;" | North Down
| colspan="5" style="" | Kilfedder
| colspan="3" style="" | McCartney
| colspan="3" style="" | Hermon
| colspan="7" style="" | →
| colspan="2" style="" | Farry
| style="" | Easton
|-
| style="padding: 1px 2px;" | South Antrim
| colspan="7" style="" | Forsythe
| style="" | McCrea
| colspan="2" style="" | Burnside
| colspan="5" style="" | McCrea
| style="" | Kinahan
| colspan="4" style="" | Girvan
| style="" | Swann
|-
| style="padding: 1px 2px;" | South Down
| colspan="2" style="" | Powell
| colspan="10" style="" | McGrady
| colspan="4" style="" | Ritchie
| colspan="5" style="" | Hazzard
|-
| style="padding: 1px 2px;" | Strangford
| colspan="8" style="" | Taylor
| colspan="4" style="" | I Robinson
| colspan="9" style="" | Shannon
|-
| style="padding: 1px 2px;" | Upper Bann
| colspan="3" style="" | McCusker
| colspan="7" style="" | Trimble
| colspan="8" style="" | Simpson
| colspan="3" style="" | Lockhart
|-
| colspan="7" style="padding: 1px 2px;" | West Tyrone
| colspan="2" style="" | Thompson
| colspan="8" style="" | Doherty
| style="" | McElduff
| colspan="4" style="" | Begley
|}
<sup>1</sup>Paisley Jr was suspended from the DUP between July and November 2018.
Seats by political alignment (1983–present)
File:Ni mps.png
Boundary changes
2025–present
thumb|Constituencies since 2025
Following the abandonment of the Sixth Periodic Review (the 2018 review), the Boundary Commission for Northern Ireland formally launched the 2023 Review on 5 January 2021. In accordance with the provisions of the Parliamentary Constituencies Act 2020, the number of constituencies allocated to Northern Ireland was unchanged, at 18. Initial proposals were published on 20 October 2021 and, following two periods of public consultation, revised proposals were published on 17 November 2022. Final recommendations were published on 28 June 2023.
Under the recommendations, the following constituencies for Northern Ireland came into effect at the 2024 general election:
{| class="wikitable sortable"
!Constituency
!Type
!Electorate
!Previous electorate
|-
|Belfast East || BC
|70,076 ||66,273
|-
|Belfast North || BC
|71,372 ||72,332
|-
|Belfast South and Mid Down || BC
|71,978 ||70,134 (former Belfast South constituency)
|-
|Belfast West || BC
|71,921 ||65,761
|-
|East Antrim || CC
|69,936 ||64,907
|-
|East Londonderry || CC
|72,213 ||69,359
|-
|Fermanagh and South Tyrone || CC
|74,643 ||72,945
|-
|Foyle || CC
|69,890 ||74,431
|-
|Lagan Valley || CC
|76,332 ||75,884
|-
|Mid Ulster || CC
|70,094 ||70,501
|-
|Newry and Armagh || CC
|74,585 ||81,329
|-
|North Antrim || CC
|71,165 ||77,156
|-
|North Down || CC
|70,412 ||67,109
|-
|South Antrim || CC
|71,646 ||71,915
|-
|South Down || CC
|71,772 ||79,295
|-
|Strangford || CC
|70,070 ||66,990
|-
|Upper Bann || CC
|76,969 ||83,028
|-
|West Tyrone || CC
|70,614 ||66,339
|}
Belfast South and Mid Down is a new constituency, replacing the former Belfast South constituency which had a much smaller area. All of the others have undergone boundary changes, primarily to bring the electorate within the range of 69,724 to 77,062 as required by the Parliamentary Constituencies Act 1986, as amended in 2020.
2010–2025
thumb|Constituencies from 2010
Under the Fifth Periodic Review, the following configuration of constituencies was adopted in 2008. They were used in four general elections: 2010, 2015, 2017 and 2019, and also in four Assembly elections: 2011, 2016, 2017 and 2022.
1997–2010
thumb|Constituencies from 1997
Under the Fourth Periodic Review, the following configuration of constituencies was adopted in 1995. They were used in three general elections: 1997, 2001 and 2005, and also in four Northern Ireland-wide elections: the Forum election in 1996, and the Assembly elections in 1998, 2003 and 2007.
1983–1997
thumb|Constituencies from 1983
Under the House of Commons (Redistribution of Seats) Act 1979, the number of seats permitted for Northern Ireland was increased from 12 to "not greater than 18 or less than 16". This followed the abolition of the Parliament of Northern Ireland under the Northern Ireland Constitution Act 1973.
Under the Third Periodic Review, the following configuration of constituencies was adopted in 1982, with an increase from 12 to 17 constituencies. They were used in three general elections: 1983, 1987, and 1992.
1974–1983
thumb|Constituencies from 1974
Under the Second Periodic Review, the following configuration of constituencies was adopted in November 1970, after the general election earlier that year. They were used in three general elections: February 1974, October 1974, and 1979, and also in three Northern Ireland-wide elections: the 1973 Assembly election, the 1975 Constitutional Convention election, and the 1982 Assembly election.
1950–1974
thumb|Constituencies from 1950
Under the Representation of the People Act 1948, the following configuration of constituencies was adopted. They were used in seven general elections: 1950, 1951, 1955, 1959, 1964, 1966 and 1970.
The First Periodic Review, which reported in 1954 and took effect at the 1955 United Kingdom general election, made no changes to the number or boundaries of Northern Ireland constituencies.
The introduction of these constituencies accompanied the abolition of the Queen's University of Belfast constituency. It also abolished the two-member constituencies.
Under the new boundaries, Antrim was split into two single-member constituencies: North Antrim and South Antrim. Down was likewise split into North Down and South Down. Tyrone and Fermanagh was split into Fermanagh and South Tyrone in the south, and Mid Ulster in the north, which also gained further area from the Londonderry constituency.
1922–1950
thumb|Constituencies from 1922
Under the Government of Ireland Act 1920, Northern Ireland was created on 3 May 1921,
Under these boundaries, Antrim, Down, and Fermanagh and Tyrone each elected two MPs using the bloc voting system, and Northern Ireland had one university constituency, the Queen's University of Belfast constituency. As with other university constituencies in the UK, the QUB constituency elected 1 MP by the graduates of the university, regardless of where they resided, in addition to any other vote they might have.
See also
- Politics of Northern Ireland
References
External links
- Boundary Commission for Northern Ireland