Castlereagh was a local government district with the status of borough in Northern Ireland. It merged with Lisburn City Council in May 2015 under local government reorganisation in Northern Ireland to become Lisburn and Castlereagh City Council, with a small amount being transferred to Belfast City Council.
In the United Kingdom, the boundary commissions are non-departmental public bodies responsible for determining the boundaries of parliamentary constituencies for elections to the House of Commons. There are four boundary commissions: one each for England, Scotland, Wales and Northern Ireland.
Mid Ulster is a parliamentary constituency in the UK House of Commons. The current MP is Cathal Mallaghan, of Sinn Féin, who was first elected at the 2024 election.
North Antrim is a parliamentary constituency in the United Kingdom House of Commons. The current MP is Jim Allister (TUV).
East Antrim is a parliamentary constituency in the United Kingdom House of Commons. The current MP is Sammy Wilson.
South Antrim is a parliamentary constituency in the United Kingdom House of Commons. The current MP is Robin Swann (UUP)
Belfast North is a parliamentary constituency in the United Kingdom House of Commons. The current MP is John Finucane.
Belfast West is a parliamentary constituency (seat) in the House of Commons of the UK Parliament. The current MP is Paul Maskey of Sinn Fein.
Belfast South was a parliamentary constituency in the United Kingdom House of Commons.
Belfast East is a parliamentary constituency in the United Kingdom House of Commons. The current MP is Gavin Robinson (DUP)
South Down is a parliamentary constituency in the United Kingdom House of Commons. The current MP seat is vacant due to the dissolution of parliament ahead of the 2024 United Kingdom general election.
Lagan Valley is a parliamentary constituency in the United Kingdom House of Commons.
North Down is a parliamentary constituency in the United Kingdom House of Commons. The current MP is Alex Easton, elected at the 2024 United Kingdom general election.
Duncairn, a division of the parliamentary borough of Belfast, was a UK parliamentary constituency in Ireland. It returned one Member of Parliament (MP) to the House of Commons of the United Kingdom from 1918 to 1922, using the first past the post electoral system.
Shankill, a division of the parliamentary borough of Belfast, was a UK parliamentary constituency in Northern Ireland. It returned one Member of Parliament (MP) to the House of Commons of the United Kingdom from 1918 to 1922, on the electoral system of first past the post.
Larkfield was a single-member county constituency of the Parliament of Northern Ireland.
Lagan Valley was a single-member county constituency of the Parliament of Northern Ireland.
Balmoral is the most southern of ten district electoral areas (DEA) in Belfast, Northern Ireland. The district elects five members to Belfast City Council and contains the wards of Belvoir; Finaghy; Malone; Musgrave; Windsor; and Upper Malone. Balmoral, along with neighbouring Botanic, forms the greater part of the Belfast South constituencies for the Northern Ireland Assembly and UK Parliament.
The 2023 Periodic Review of Westminster constituencies was the most recent cycle of the process to redraw the constituency map for the House of Commons. The new constituency boundaries were approved by the Privy Council on 15 November 2023 and came into law on 29 November.
The 2024 general election in Northern Ireland was held on 4 July 2024, with all 18 Northern Irish seats in the House of Commons contested. The general election occurred after the recently completed constituency boundaries review.
