List of A roads in Northern Ireland

A List of A roads in Northern Ireland.

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
A1	—	—	Belfast	Killeen	—	—	Via 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	—	—	Derry	Newry	—	—	Northern Irish coastal road. Including routes such as Belfast-Bangor, Belfast-Carrickfergus, Newry-Warrenpoint and Derry-Limavady
A3	—	—	Lisburn	Cavan	—	—	Via Craigavon and Armagh. Becomes the N12 at Middletown until Monaghan, then the N54 to Cavan via southern Fermanagh.
A4	—	—	Craigavon (Portadown)	Belcoo	—	—	Via Dungannon and Enniskillen. Becomes the N16 at the border towards Sligo.
A5	—	—	Derry	Aughnacloy	—	—	Via Strabane and Omagh. Becomes the N2 after the Aughnacloy at the border towards Dublin.
A6	—	—	Derry	Belfast	—	—	Via Dungiven, Antrim and Glengormley.
A7	—	—	Carryduff	Downpatrick	—	—	Via Saintfield. Stemming off the A24, it forms most of the main road from Belfast to Downpatrick.
A8	—	—	Glengormley	Larne	—	—	Via Ballynure. Stemming from the A6.
A11	—	—	Belfast Inner Ring Road		—	—
A12	—	—	Belfast (Broadway)	Belfast (York Street)	—	—	Westlink dual-carriageway in Belfast
A20	—	—	Belfast (Bridge End)	Portaferry	—	—	Via Dundonald and Newtownards
A21	—	—	Bangor	Ballynahinch	—	—	Via Newtownards and Comber and Ballygowan
A22	—	—	Dundonald	Downpatrick	—	—	Via Comber, Killinchy and Killyleagh.
A23	—	—	Belfast	Ballygowan	—	—	Via Moneyreagh.
A24	—	—	Belfast (Cromac Street)	Clough	—	—	Via Carryduff and Ballynahinch. Forms the greater part of the route from Belfast to Newcastle, and Kilkeel.
A25	—	—	Strangford	Altnamackan	—	—	Via Downpatrick, Clogh, Rathfriland, Newry and Newtownhamilton. Becomes the R182 at the border and carries on towards Castleblaney.
A26	—	—	Coleraine	Banbridge	—	—	Via Coleraine, Ballymena, Antrim, Moira, Craigavon (Lurgan) and Warringstown.
A27	—	—	Newry	Craigavon (Portadown)	—	—
A28	—	—	Newry (Sheepsbridge)	Aughnacloy	—	—	Via Markethill, Armagh and Caledon.
A29	—	—	Portrush	Ballymaclosha	—	—	Via Maghera, Cookstown, Dungannon, Armagh, Keady and Newtownhamilton. At the border it becomes the R177 and carries on towards Dundalk.
A30	—	—	Lisburn	Glenavy	—	—
A31	—	—	Moneymore	Castledawson	—	—	Forms part of the route connecting Cookstown to Belfast.
A32	—	—	Omagh	Swanlinbar	—	—	Via Enniskillen. Becomes the N87 at the border.
A33	—	—	Newtownbutler	Republic of Ireland border west of Clones	—	—	Became a portion of a rerouted A34 by the 1970s.
A34	—	—	Maguiresbridge	Clones	—	—	Via Lisnaskea and Newtownbutler. Becomes the R183 road at the border
A35	—	—	Irvinestown	Pettigo	—	—	Via Kesh. Becomes the R234 at the border.
A36	—	—	Ballykeel	Ballyrickard	—	—	Via Moorfields and Killwaughter. Forms the main route from Larne to Ballymena.
A37	—	—	Macosquin	Limavady	—	—	Part of the Coleraine to Derry route.
A37	—	—	border near Dundalk	border near Castleblayney	—	—	Only a short stretch of this route actually lies within Northern Ireland. The rest of the route being called the N53.
A38	—	—	Strabane	Lifford	—	—	Less than a mile lies in Northern Ireland crossing the River Foyle and divides into the N14 to Letterkenny and N15 to Sligo.
A39	—	—	Maguiresbridge	Lisnaskea	—	—	Became a portion of a rerouted A34.
A40	—	—	Derry city centre	Carrigans	—	—	West of the River Foyle, becomes the R236 at the border which carries on towards Raphoe.
A42	—	—	Maghera	Carnlough	—	—	Via Portglenone, Ahoghill, Galgorm, Ballymena and Broughshane.
A43	—	—	Ballymena	Glenarriff	—	—	Via Martinstown.
A44	—	—	Ballycastle	A26 north of Cloughmills	—	—	Via Armoy.
A45	—	—	Granville	Tamnamore	—	—	Via Dungannon and Coalisland
A46	—	—	Enniskillen	Belleek	—	—	Becomes the N3 at the border which carries on towards Ballyshannon.
A47	—	—	Enniskillen (Trory)	Belleek	—	—	Via Killadeas, Lisnarick, Kesh, Boa Island and Leggs.
A48	—	—	Newtownards	Donaghadee	—	—	Via Six Road Ends.
A49	—	—	Lisburn	Ballynahinch	—	—
A50	—	—	Craigavon (Portadown)	Newcastle	—	—	Via Gilford, Banbridge, Katesbridge and Castlewellan.
A51	—	—	Gilford	Armagh	—	—	Via Tandragee and Hamiltonsbawn.
A52	—	—	Belfast (Carlisle Circus)	Crumlin	—	—	Via Nutt's Corner.
A53	—	—	Cookstown	Orritor	—	—
A54	—	—	Castledawson	Coleraine	—	—	Via Bellaghy and Kilrea.
A55	—	—	Belfast Outer Ring Road		—	—
A57	—	—	Belfast International Airport	Ballynure	—	—	Via Templepatrick and Ballyclare. Forms part of the main route connecting the airport with Belfast City and Larne.
A68	—	—	High Street, Belfast	York Road station, Belfast	—	—	via Corporation Street; now part of the A2 one-way system. It is unknown why the A68 number was chosen; an A5xx number (which were allocated to Belfast until the A505), the A56 (was and still is the lowest available number) or an A1x number (later allocated to central Belfast roads) would have been more logical.
A76	—	—	M1	Craigavon (Lurgan)	—	—
A97	—	—	—	—	—	—	Number appears on 1940s maps; typo for the A37 running through Cullaville.
A99	—	—	A3 Edward Street, Lurgan	A26/B3 in Lurgan	—	—	Millennium Way; one sign showed "A3", but this is incorrect.
A101	—	—	M1	Sprucefield, near Lisburn	—	—	Part of Belfast - Dublin route
A211	—	—	—	—	—	—	Bridge Street and Newtownards Road in Comber, designated when the A21 Comber Bypass was opened in 2004
A221	—	—	—	—	—	—	Bridge Street and Newtownards Road in Comber, designated when the A21 Comber Bypass was opened in 2004. Officially known as A211, but signed as A221.
A371	—	—	—	—	—	—	Various roads in Limavady town centre, designated when the A37 Limavady Bypass was opened in 2004
A500	—	—	Donegall Street, Belfast	Whitla Street, Belfast	—	—	The northern section is now part of a rerouted A2 and the southern half unclassified.
A501	—	—	Belfast	A30 just east of Glenavy	—	—
A503	—	—	Donegall Square, Belfast	Shaftesbury Square, Belfast	—	—	via 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.
A504	—	—	Dundonald	Newtownbreda	—	—	Formerly 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.
A505	—	—	Omagh	Cookstown	—	—	Via Mountfield.
A508	—	—	Antrim	Rathbeg	—	—	via Belmont Road, Ballycraigy Road and Greystone Road (former B95); 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.
A509	—	—	Enniskillen	Belturbet	—	—	Becomes the N3 at the border after Derrylin.
A510	—	—	Belfast (Cromac Street)	Ballymacarrett (Albertbridge Road)	—	—	Formerly numbered as A20.
A512	—	—	—	—	—	—	Old Golf Course link road in West Belfast and North Lisburn
A513	—	—	Ballymacash	Derriaghy	—	—	Lisburn Feeder Road
A514	—	—	Derry Ring Road (Crescent Link)		—	—
A515	—	—	Derry Ring Road (Foyle Bridge and Skeoge Link Road)		—	—
A519	—	—	Tonagh	Ballymacash	—	—	Distributor road in western Lisburn
A520	—	—	Ballymacash	Knockmore	—	—	Link between the A3 and the A519 in Western Lisburn
A522	—	—	Dublin Road, Antrim	Belmont Road, Antrim	—	—	Former route of the A6 through Antrim town centre.
A523	—	—	Ballymena Town Centre	Ballee Roundabout, Ballymena	—	—	Former route of the A26 through Ballymena.