List of A roads in Northern Ireland

A List of A roads in Northern Ireland.

Road	From	To	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.
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 .
	Newry	Craigavon (Portadown)
	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.
	Lisburn	Glenavy
	Moneymore	Castledawson	Form part of the route connecting Cookstown to Belfast.
A32	Omagh	Swanlinbar	Via Enniskillen. Becomes the N87 at the border.
A34	Maguiresbridge	Clones	Via Lisnaskea and Newtownbutler. Becomes the R183 road at the border
	Irvinestown	Pettigo	Via Kesh. Becomes the R234 at the border.
A36	Ballykeel	Ballyrickard	Via Moorfields and . Forms the main route from Larne to Ballymena.
A37 (Co. Londonderry)	Macosquin	Limavady	Part of the Coleraine to Derry route.(North)
A37 (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	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	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, , Ballymena and Broughshane.
	Ballymena	Glenarriff	Via Martinstown.
	Ballycastle	A26 north of Cloughmills	Via Armoy.
	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 .
	Newtownards	Donaghadee	Via Six Road Ends.
	Lisburn	Ballynahinch
A50	Craigavon (Portadown)	Newcastle	Via Gilford, Banbridge, Katesbridge and Castlewellan.
	Gilford	Armagh	Via Tandragee and Hamiltonsbawn.
	Belfast (Carlisle Circus)	Crumlin	Via Nutt's Corner.
	Castledawson	Coleraine	Via Bellaghy and Kilrea.
A55			Belfast Outer Ring Road
	Belfast International Airport	Ballynure	Via Templepatrick and Ballyclare.Forms part of the main route connecting the airport with Belfast City and Larne.
	M1	Craigavon (Lurgan)
	M1	Sprucefield, near Lisburn
			Bridge Street and Newtownards Road in Comber, designated when the A21 Comber Bypass was opened in 2004
			Various roads in Limavady town centre, designated when the A37 Limavady Bypass was opened in 2004
	Belfast	A30 just east of Glenavy
A505	Omagh	Cookstown	Via Mountfield.
A509	Enniskillen	Belturbet	Becomes the N3 at the border after Derrylin.
	Belfast (Cromac Street)	Ballymacarrett (Albertbridge Road)	Formerly numbered as A20.
			Old Golf Course link road in West Belfast and North Lisburn
	Ballymacash	Derriaghy	Lisburn Feeder Road
			Derry Ring Road (Crescent Link)
A515			Derry Ring Road (Foyle Bridge and Skeoge Link Road)
		Ballymacash	Distributor road in western Lisburn
	Ballymacash	Knockmore	Link between the A3 and the A519 in Western Lisburn
	Dublin Road, Antrim	Belmont Road, Antrim	Former route of the A6 through Antrim town centre.
	Ballymena Town Centre	Ballee Roundabout, Ballymena	Former route of the A26 through Ballymena.