List of A roads in Northern Ireland

A List of A roads in Northern Ireland.

Road	From	To	Notes
A1 road	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 road	Derry	Newry	Northern Irish coastal road. Including routes such as Belfast-Bangor, Belfast-Carrickfergus, Newry-Warrenpoint and Derry-Limavady
A3 road	Lisburn	Cavan	Via Craigavon and Armagh. Becomes the N12 at Middletownn until Monaghan, then the N54 to Cavan via southern Fermanagh.
A4 road	Craigavon (Portadown)	Belcoo	Via Dungannon and Enniskillen. Becomes the N16 at the border towards Sligo.
A5 road	Derry	Aughnacloy	Via Strabane and Omagh. Becomes the N2 after the Aughnacloy at the border towards Dublin.
A6 road	Derry	Belfast	Via Dungiven, Antrim and Glengormley.
A7 road	Carryduff	Downpatrick	Via Saintfield. Stemming off the A24, it forms most of the main road from Belfast to Downpatrick.
A8 road	Glengormley	Larne	Via Ballynure. Stemming from the A6.
A11 road			Belfast Inner Ring Road
A12 road	Belfast (Broadway)	Belfast (York Street)	Westlink dual-carriageway in Belfast
A20 road	Belfast (Bridge End)	Portaferry	Via Dundonald and Newtownards
A21 road	Bangor	Ballynahinch	Via Newtownards and Comber.
A22 road	Dundonald	Downpatrick	Via Comber, Killinchy and Killyleagh.
A23 road	Belfast	Ballygowan	Via Moneyreagh.
A24 road	Belfast (Cromac Street)	Clough	Via Carryduff and Ballynahinch. Forms the greater part of the route from Belfast to Newcastle, and Kilkeel.
A25 road	Strangford	Altnamackan	Via Downpatrick, Clogh, Rathfriland, Newry and Newtownhamilton. Becomes the R182 at the border and carries on towards Castleblaney.
A26 road	Coleraine	Banbridge	Via Coleraine, Ballymena, Antrim, Moira, Craigavon (Lurgan) and Warringstown.
A27 road	Newry	Craigavon (Portadown)
A28 road	Newry (Sheepsbridge)	Aughnacloy	Via Markethill, Armagh and Caledon.
A29 road	Portrush	Ballymaclosha	Via Maghera, Cookstown, Dungannon, Armagh, Keady and Newtownhamilton. At the border it becomes the R177 and carries on towards Dundalk.
A30 road	Lisburn	Glenavy
A31 road	Moneymore	Castledawson	Form part of the route connecting Cookstown to Belfast.
A32 road	Omagh	Swanlinbar	Via Enniskillen. Becomes the N87 at the border.
A34 road	Maguiresbridge	Clones	Via Lisnaskea and Newtownbutler. Becomes the R183 road at the border
A35 road	Irvinestown	Pettigo	Via Kesh. Becomes the R234 at the border.
A36 road	Ballykeel	Ballyrickard	Via Moorfields and Killwaughter. Forms the main route from Larne to Ballymena.
A37 road (Co. Londonderry)	Macosquin	Limavady	Part of the Coleraine to Derry route.(North)
A37 road (Co. Armagh)	Dundalk	Castleblayney	Only a short stretch of this route actually lies within Northern Ireland. The rest of the route being called the N53.(South)
A38 road	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.
A40 road	Derry city centre	Carrigans	West of the River Foyle, becomes the R236 at the border which carries on towards Raphoe.
A42 road	Maghera	Carnlough	Via Portglenone, Ahoghill, Galgorm, Ballymena and Broughshane.
A43 road	Ballymena	Glenarriff	Via Martinstown.
A44 road	Ballycastle	A26 north of Cloughmills	Via Armoy.
A45 road	Granville	Tamnamore	Via Dungannon and Coalisland
A46 road	Enniskillen	Belleek	Becomes the N3 at the border which carries on towards Ballyshannon.
A47 road	Enniskillen (Trory)	Belleek	Via Killadeas, Lisnarick, Kesh, Boa Island and Leggs.
A48 road	Newtownards	Donaghadee	Via Six Road Ends.
A49 road	Lisburn	Ballynahinch
A50 road	Craigavon (Portadown)	Newcastle	Via Gilford, Banbridge, Katesbridge and Castlewellan.
A51 road	Gilford	Armagh	Via Tandragee and Hamiltonsbawn.
A52 road	Belfast (Carlisle Circus)	Crumlin	Via Nutt's Corner.
A54 road	Castledawson	Coleraine	Via Bellaghy and Kilrea.
A55 road			Belfast Outer Ring Road
A57 road	Belfast International Airport	Ballynure	Via Templepatrick and Ballyclare.Forms part of the main route connecting the airport with Belfast City and Larne.
A76	M1	Craigavon (Lurgan)
A101	M1	Sprucefield, near Lisburn
A211			Bridge Street and Newtownards Road in Comber, designated when the A21 Comber Bypass was opened in 2004
A371			Various roads in Limavady town centre, designated when the A37 Limavady Bypass was opened in 2004
A501	Belfast	A30 just east of Glenavy
A505	Omagh	Cookstown	Via Mountfield.
A509	Enniskillen	Belturbet	Becomes the N3 road 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.