List of A roads in Northern Ireland


The following is a list of A roads in Northern Ireland. As of 2023, A roads made up 8.9% of all roads in Northern Ireland.
RoadFromToNotes
A1 BelfastKilleenVia Lisburn and Newry. Forming part of the main route from Belfast to Dublin. Becoming the N1 at the border, joining onto the Southern Irish M1 before Dundalk.
A2 DerryNewryNorthern Irish coastal road. Including routes such as Belfast-Bangor, Belfast-Carrickfergus, Newry-Warrenpoint and Derry-Limavady
A3 LisburnCavanVia Craigavon and Armagh. Becomes the N12 at Middletown until Monaghan, then the N54 to Cavan via southern Fermanagh.
A4 Craigavon BelcooVia Dungannon and Enniskillen. Becomes the N16 at the border towards Sligo.
A5 DerryAughnacloyVia Strabane and Omagh. Becomes the N2 after the Aughnacloy at the border towards Dublin.
A6 DerryBelfastVia Dungiven, Antrim and Glengormley.
A7 CarryduffDownpatrickVia Saintfield. Stemming off the A24, it forms most of the main road from Belfast to Downpatrick.
A8 GlengormleyLarneVia Ballynure. Stemming from the A6.
A9 - A10Unused
A11 Belfast Inner Ring Road
A12 Belfast Belfast Westlink dual-carriageway in Belfast
A13 - A19Unused
A20 Belfast PortaferryVia Dundonald and Newtownards
A21 BangorBallynahinchVia Newtownards and Comber and Ballygowan
A22 DundonaldDownpatrickVia Comber, Killinchy and Killyleagh.
A23 BelfastBallygowanVia Moneyreagh.
A24 Belfast CloughVia Carryduff and Ballynahinch. Forms the greater part of the route from Belfast to Newcastle, and Kilkeel.
A25 StrangfordAltnamackanVia Downpatrick, Clogh, Rathfriland, Newry and Newtownhamilton. Becomes the R182 at the border and carries on towards Castleblaney.
A26 ColeraineBanbridgeVia Coleraine, Ballymena, Antrim, Moira, Craigavon and Warringstown.
A27 NewryCraigavon
A28 Newry AughnacloyVia Markethill, Armagh and Caledon.
A29 PortrushBallymacloshaVia Maghera, Cookstown, Dungannon, Armagh, Keady and Newtownhamilton. At the border it becomes the R177 and carries on towards Dundalk.
A30 LisburnGlenavy
A31 MoneymoreCastledawsonForm part of the route connecting Cookstown to Belfast.
A32 OmaghSwanlinbarVia Enniskillen. Becomes the N87 at the border.
A33 NewtownbutlerRepublic of Ireland border west of ClonesBecame a portion of a rerouted A34 by the 1970s.
A34 MaguiresbridgeClonesVia Lisnaskea and Newtownbutler. Becomes the R183 road at the border
A35 IrvinestownPettigoVia Kesh. Becomes the R234 at the border.
A36 BallykeelBallyrickardVia Moorfields and Killwaughter. Forms the main route from Larne to Ballymena.
A37
MacosquinLimavadyPart of the Coleraine to Derry route.
A37
DundalkCastleblayneyOnly a short stretch of this route actually lies within Northern Ireland. The rest of the route being called the N53.
A38 StrabaneLiffordLess than a mile lies in Northern Ireland crossing the River Foyle and divides into the N14 to Letterkenny and N15 to Sligo.
A39 MaguiresbridgeLisnaskeaBecame a portion of a rerouted A34.
A40 Derry city centreCarrigansWest of the River Foyle, becomes the R236 at the border which carries on towards Raphoe.
A41Unused
A42 MagheraCarnloughVia Portglenone, Ahoghill, Galgorm, Ballymena and Broughshane.
A43 BallymenaGlenarriffVia Martinstown.
A44 BallycastleA26 north of CloughmillsVia Armoy.
A45 GranvilleTamnamoreVia Dungannon and Coalisland
A46 EnniskillenBelleekBecomes the N3 at the border which carries on towards Ballyshannon.
A47 Enniskillen BelleekVia Killadeas, Lisnarick, Kesh, Boa Island and Leggs.
A48 NewtownardsDonaghadeeVia Six Road Ends.
A49 LisburnBallynahinch
A50 Craigavon NewcastleVia Gilford, Banbridge, Katesbridge and Castlewellan.
A51 GilfordArmaghVia Tandragee and Hamiltonsbawn.
A52 Belfast CrumlinVia Nutt's Corner.
A53 CookstownOrritorDeclassified.
A54 CastledawsonColeraineVia Bellaghy and Kilrea.
A55 Belfast Outer Ring Road
A56Unused
A57 Belfast International AirportBallynureVia Templepatrick and Ballyclare. Forms part of the main route connecting the airport with Belfast City and Larne.
A58 - A67Unused
A68 High Street, BelfastYork Road station, Belfastvia Corporation Street; now part of the A2 one-way system. It is unknown why the A68 number was chosen; an A5xx number, the A56 or an A1x number would have been more logical.
A69 - A75Unused
A76M1Craigavon
A77 - A96Unused
A97Number appears on 1940s maps; typo for the A37 running through Cullaville.
A98Unused
A99A3 Edward Street, LurganA26/B3 in LurganMillennium Way; one sign showed "A3", but this is incorrect.
A101M1Sprucefield, near Lisburn
A211Bridge Street and Newtownards Road in Comber, designated when the A21 Comber Bypass was opened in 2004
A221Bridge Street and Newtownards Road in Comber, designated when the A21 Comber Bypass was opened in 2004. Officially known as A211, but signed as A221.
A371Various roads in Limavady town centre, designated when the A37 Limavady Bypass was opened in 2004
A500Donegall Street, BelfastWhitla Street, BelfastThe northern section is now part of a rerouted A2 and the southern half unclassified.
A501BelfastA30 just east of Glenavy
A502Unused
A503Donegall Square, BelfastShaftesbury Square, Belfastvia Howard Street and Great Victoria Street; former portions of the B38 and B23. Later became part of the A1 one-way system and is now part of the A1 and A11.
A504DundonaldNewtownbredaFormerly a section of the B205 before it was upgraded as part of work to give Belfast an outer ring road. Now part of the A55.
A505OmaghCookstownVia Mountfield.
A506 - A507Unused
A508AntrimRathbegvia Belmont Road, Ballycraigy Road and Greystone Road ; the section along Belmont Road is now part of a rerouted A6 and the remainder downgraded to Class II status: Ballycraigy Road is now the B518 and Greystone Road returned to the B95.
A509EnniskillenBelturbetBecomes the N3 at the border after Derrylin.
A510Belfast Ballymacarrett Formerly numbered as A20.
A511Unused
A512Old Golf Course link road in West Belfast and North Lisburn
A513BallymacashDerriaghyLisburn Feeder Road
A514Derry Ring Road
A515Derry Ring Road
A516 - A518Unused
A519TonaghBallymacashDistributor road in western Lisburn
A520BallymacashKnockmoreLink between the A3 and the A519 in Western Lisburn
A521Unused
A522Dublin Road, AntrimBelmont Road, AntrimFormer route of the A6 through Antrim town centre.
A523Ballymena Town CentreBallee Roundabout, BallymenaFormer route of the A26 through Ballymena.