The Northern Ireland House of Commons existed from 1921 to 1973 as the lower House of the devolved legislature of the part of the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 called Northern Ireland

Northern Ireland

Northern Ireland is one of the four countries of the United Kingdom. Situated in the north-east of the island of Ireland, it shares a border with the Republic of Ireland to the south and west...

.

As in the UK Parliament the constituencies were classified as borough, county or university constituencies.

In 1921-29 the 52 provincial Members of Parliament were elected using proportional representation

Proportional representation

Proportional representation is a concept in voting systems used to elect an assembly or council. PR means that the number of seats won by a party or group of candidates is proportionate to the number of votes received. For example, under a PR voting system if 30% of voters support a particular...

 by the single transferable vote

Single transferable vote

The single transferable vote is a voting system designed to achieve proportional representation through preferential voting. Under STV, an elector's vote is initially allocated to his or her most preferred candidate, and then, after candidates have been either elected or eliminated, any surplus or...

 in multi member constituencies. The constituencies which returned one or two members to the UK Parliament, between 1922 and 1950, were used for Northern Ireland devolved elections in the 1921-29 period.

Between 1929 and 1969 there were 48 single member constituencies, using the first past the post method of election. The non-territorial University constituency

University constituency

A university constituency is a constituency, used in elections to a legislature, that represents a university rather than a geographical area. University constituencies may involve plural voting, in which eligible voters are permitted to vote in both a university constituency and a geographical...

 continued to return 4 members using the single transferable vote.

For the 1969 election 4 new territorial constituencies were created to replace the University seats. The 52 constituencies ceased to exist after the Parliament of Northern Ireland

Parliament of Northern Ireland

The Parliament of Northern Ireland was the home rule legislature of Northern Ireland, created under the Government of Ireland Act 1920, which sat from 7 June 1921 to 30 March 1972, when it was suspended...

 was suspended in 1972 and abolished in 1973.

Period	Constituency	Type	Notes
1921-1929	Antrim Antrim (Northern Ireland Parliament constituency) Antrim was a county constituency of the Parliament of Northern Ireland from 1921 - 1929. It returned seven MPs, using the single transferable vote method of proportional representation.-Boundaries:...	county	7 MPs
1929-1973	Antrim Borough Antrim Borough (Northern Ireland Parliament constituency) Antrim, sometimes known as Antrim Borough to distinguish it from the former constituency of the same name, was a single-member county constituency of the Parliament of Northern Ireland.-Boundaries and boundary changes:...	county
1929-1973	Bann Side	county
1929-1973	Carrick	county
1969-1973	Larkfield	county
1929-1973	Larne	county
1929-1973	Mid Antrim Mid Antrim (Northern Ireland Parliament constituency) Mid Antrim was a constituency of the Northern Ireland House of Commons.The House of Commons Act , 1929 introduced first-past-the-post elections for 48 single-member constituencies .It was a single-member division of County Antrim represented in the Parliament of Northern Ireland...	county
1969-1973	Newtownabbey	county
1929-1973	North Antrim	county
1929-1973	South Antrim	county
1921-1929	Armagh	county	4 MPs
1929-1973	Central Armagh Central Armagh (Northern Ireland Parliament constituency) Central Armagh was a constituency of the Parliament of Northern Ireland.-Boundaries:Central Armagh was a county constituency comprising the north central part of County Armagh. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	Mid Armagh Mid Armagh (Northern Ireland Parliament constituency) Mid Armagh was a constituency of the Parliament of Northern Ireland.-Boundaries:Mid Armagh was a county constituency comprising the south central part of County Armagh. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	North Armagh North Armagh (Northern Ireland Parliament constituency) North Armagh was a constituency of the Parliament of Northern Ireland.-Boundaries:North Armagh was a county constituency comprising the northern part of County Armagh. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	South Armagh South Armagh (Northern Ireland Parliament constituency) South Armagh was a constituency of the Parliament of Northern Ireland.-Boundaries:South Armagh was a county constituency comprising the southern part of County Armagh. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	Belfast Ballynafeigh Belfast Ballynafeigh (Northern Ireland Parliament constituency) Belfast Ballynafeigh was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Ballynafeigh was a borough constituency comprising part of southern Belfast...	borough
1929-1973	Belfast Bloomfield Belfast Bloomfield (Northern Ireland Parliament constituency) Belfast Bloomfield was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Bloomfield was a borough constituency comprising part of eastern Belfast...	borough
1929-1973	Belfast Central Belfast Central (Northern Ireland Parliament constituency) Belfast Central was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Central was a borough constituency comprising part of central Belfast...	borough
1929-1973	Belfast Clifton Belfast Clifton (Northern Ireland Parliament constituency) Belfast Clifton was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Clifton was a borough constituency comprising part of northern Belfast...	borough
1929-1973	Belfast, Cromac Belfast Cromac (Northern Ireland Parliament constituency) Belfast Cromac was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Cromac was a borough constituency comprising part of southern Belfast...	borough
1929-1973	Belfast Dock Belfast Dock (Northern Ireland Parliament constituency) Belfast Dock was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Dock was a borough constituency comprising part of northern Belfast...	borough
1929-1973	Belfast Duncairn Belfast Duncairn (Northern Ireland Parliament constituency) Belfast Duncairn was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Duncairn was a borough constituency comprising part of northern Belfast...	borough
1921-1929	Belfast East Belfast East (Northern Ireland Parliament constituency) Belfast East was a borough constituency of the Parliament of Northern Ireland from 1921 - 1929. It returned four MPs, using the single transferable vote method of proportional representation.- Boundaries :...	borough	4 MPs
1929-1973	Belfast Falls Belfast Falls (Northern Ireland Parliament constituency) Belfast Falls was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Falls was a borough constituency comprising part of western Belfast...	borough
1921-1929	Belfast North Belfast North (Northern Ireland Parliament constituency) Belfast North was a borough constituency of the Parliament of Northern Ireland from 1921 - 1929. It returned four MPs, using the single transferable vote method of proportional representation.-Boundaries:...	borough	4 MPs
1929-1973	Belfast Oldpark Belfast Oldpark (Northern Ireland Parliament constituency) Belfast Oldpark was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Oldpark was a borough constituency comprising part of northern Belfast...	borough
1929-1973	Belfast Pottinger Belfast Pottinger (Northern Ireland Parliament constituency) Belfast Pottinger was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Pottinger was a borough constituency comprising part of eastern Belfast...	borough
1929-1973	Belfast St Anne's Belfast St Anne's (Northern Ireland Parliament constituency) Belfast St Anne's was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast St Anne's was a borough constituency comprising part of south-western Belfast...	borough
1929-1973	Belfast Shankill Belfast Shankill (Northern Ireland Parliament constituency) Belfast Shankill was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Shankill was a borough constituency comprising part of northern Belfast...	borough
1921-1929	Belfast South Belfast South (Northern Ireland Parliament constituency) Belfast South was a borough constituency of the Parliament of Northern Ireland from 1921-1929. It returned four MPs, using the single transferable vote method of proportional representation.-Boundaries:...	borough	4 MPs
1929-1973	Belfast Victoria Belfast Victoria (Northern Ireland Parliament constituency) Belfast Victoria was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Victoria was a borough constituency comprising part of eastern Belfast...	borough
1921-1929	Belfast West Belfast West (Northern Ireland Parliament constituency) Belfast West was a borough constituency of the Parliament of Northern Ireland from 1921 - 1929. It returned four MPs, using the single transferable vote method of proportional representation.-Boundaries:...	borough	4 MPs
1929-1973	Belfast Willowfield Belfast Willowfield (Northern Ireland Parliament constituency) Belfast Willowfield was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Willowfield was a borough constituency comprising part of southern Belfast...	borough
1929-1973	Belfast Windsor Belfast Windsor (Northern Ireland Parliament constituency) Belfast Windsor was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Windsor was a borough constituency comprising part of southern Belfast...	borough
1929-1973	Belfast Woodvale Belfast Woodvale (Northern Ireland Parliament constituency) Belfast Woodvale was a constituency of the Parliament of Northern Ireland.-Boundaries:Belfast Woodvale was a borough constituency comprising part of western Belfast...	borough
1921-1929	Down Down (Northern Ireland Parliament constituency) Down was a county constituency of the Parliament of Northern Ireland from 1921 - 1929. It returned eight MPs, using the single transferable vote method of proportional representation.-Boundaries:...	county	8 MPs
1929-1973	Ards Ards (Northern Ireland Parliament constituency) Ards was a constituency of the Parliament of Northern Ireland.-Boundaries:Ards was a county constituency comprising the town of Newtownards, the Ards peninsula and the town of Donaghadee. It was created in 1929 when the House of Commons Act 1929 introduced first past the post elections...	county
1969-1973	Bangor Bangor (Northern Ireland Parliament constituency) Bangor was a single-member county constituency of the Parliament of Northern Ireland.-Boundaries and Boundary Changes:Bangor was created by the Electoral Law Act 1968 as a division of County Down. It was located to the east of Belfast...	county
1929-1973	East Down East Down (Northern Ireland Parliament constituency) East Down was a constituency of the Parliament of Northern Ireland.-Boundaries:East Down was a county constituency comprising the towns of Ardglass, Ballynahinch, Crossgar, Downpatrick, Dunmore, Killinchy, Killyleagh, Kilmore, Saintfield and Strangford, all in the current Down District Council...	county
1929-1973	Iveagh Iveagh (Northern Ireland Parliament constituency) Iveagh was a constituency of the Parliament of Northern Ireland.-Boundaries:Iveagh was a county constituency comprising part of northern County Down, south west of Belfast. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1969-1973	Lagan Valley Lagan Valley (Northern Ireland Parliament constituency) Lagan Valley was a single-member county constituency of the Parliament of Northern Ireland.-Boundaries and Boundary Changes:Before 1969, the area formed part of the Northern Ireland Parliament constituencies of Mid Down and Iveagh....	county
1929-1973	Mid Down Mid Down (Northern Ireland Parliament constituency) Mid Down was a constituency of the Parliament of Northern Ireland.-Boundaries:Mid Down was a county constituency comprising part of northern County Down, immediately south east of Belfast. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout...	county
1929-1973	Mourne Mourne (Northern Ireland Parliament constituency) Mourne was a constituency of the Parliament of Northern Ireland.-Boundaries:Mourne was a county constituency comprising part of southern County Down, including the Mountains of Mourne. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern...	county
1929-1973	North Down North Down (Northern Ireland Parliament constituency) North Down was a constituency of the Parliament of Northern Ireland.-Boundaries:North Down was a county constituency comprising part of northern County Down, immediately south east of Belfast. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout...	county
1929-1973	South Down South Down (Northern Ireland Parliament constituency) South Down was a constituency of the Parliament of Northern Ireland.-Boundaries:South Down was a county constituency comprising part of southern County Down. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	West Down West Down (Northern Ireland Parliament constituency) West Down was a constituency of the Parliament of Northern Ireland.-Boundaries:West Down was a county constituency comprising part of western County Down. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1921-1929	Fermanagh and Tyrone Fermanagh and Tyrone (Northern Ireland Parliament constituency) Fermanagh and Tyrone was a county constituency of the Parliament of Northern Ireland from 1921 - 1929. It returned eight MPs, using the single transferable vote method of proportional representation.-Boundaries:...	county	8 MPs
1929-1973	Enniskillen Enniskillen (Northern Ireland Parliament constituency) Enniskillen was a constituency of the Parliament of Northern Ireland.-Boundaries:Enniskillen was a county constituency comprising the northern part of County Fermanagh. It was created in 1929, when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	Lisnaskea Lisnaskea (Northern Ireland Parliament constituency) Lisnaskea was a constituency of the Parliament of Northern Ireland.-Boundaries:Lisnaskea was a county constituency comprising the eastern part of County Fermanagh. It was created in 1929, when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	South Fermanagh South Fermanagh (Northern Ireland Parliament constituency) South Fermanagh was a constituency of the Parliament of Northern Ireland.-Boundaries:Fermanagh South was a county constituency comprising the southern part of County Fermanagh. It was created in 1929 when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern...	county
1921-1929	Londonderry Londonderry (Northern Ireland Parliament constituency) Londonderry was a county constituency of the Parliament of Northern Ireland from 1921 - 1929. It returned five MPs, using the single transferable vote method of proportional representation.-Boundaries:...	county	5 MPs
1929-1973	City of Londonderry City of Londonderry (Northern Ireland Parliament constituency) The City of Londonderry parliamentary constituency was a single member constituency in the Parliament of Northern Ireland. It was created in 1929, as one of the five single member constituencies replacing the former five member Londonderry constituency....	borough
1929-1973	Foyle Foyle (Northern Ireland Parliament constituency) Foyle was a single member constituency in the Parliament of Northern Ireland. It was created in 1929 as one of the five single-member constituencies replacing the former five-member Londonderry constituency...	borough
1929-1973	Mid Londonderry Mid Londonderry (Northern Ireland Parliament constituency) Mid Londonderry was a county constituency comprising the central part of County Londonderry. It was created in 1929, when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	North Londonderry North Londonderry (Northern Ireland Parliament constituency) North Londonderry was a county constituency comprising the southern part of County Londonderry. It was created in 1929, when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	South Londonderry South Londonderry (Northern Ireland Parliament constituency) The South Londonderry constituency for the Parliament of Northern Ireland was created in 1929 and continued until the abolition of the Parliament in 1973...	county
1921-1969	Queen's University, Belfast	university	4 MPs
1929-1973	East Tyrone East Tyrone (Northern Ireland Parliament constituency) East Tyrone was a constituency of the Parliament of Northern Ireland.-Boundaries:East Tyrone was a county constituency comprising the eastern part of County Tyrone. It was created in 1929, when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	Mid Tyrone Mid Tyrone (Northern Ireland Parliament constituency) Mid Tyrone was a constituency of the Parliament of Northern Ireland.-Boundaries:Mid Tyrone was a county constituency comprising the central part of County Tyrone. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	North Tyrone North Tyrone (Northern Ireland Parliament constituency) North Tyrone was a constituency of the Parliament of Northern Ireland.-Boundaries:North Tyrone was a county constituency comprising the northern part of County Tyrone. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	South Tyrone South Tyrone (Northern Ireland Parliament constituency) South Tyrone was a constituency of the Parliament of Northern Ireland.-Boundaries:South Tyrone was a county constituency comprising the central part of County Tyrone. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county
1929-1973	West Tyrone West Tyrone (Northern Ireland Parliament constituency) West Tyrone was a constituency of the Parliament of Northern Ireland.-Boundaries:West Tyrone was a county constituency comprising the western part of County Tyrone. It was created when the House of Commons Act 1929 introduced first-past-the-post elections throughout Northern Ireland...	county

Sources:

• Northern Ireland Parliamentary Election Results 1921-1972, compiled and edited by Sydney Elliott (Political Reference Publications 1973)
• For the exact definition of constituency boundaries see http://www.election.demon.co.uk/stormont/boundaries.html