List of B roads in Northern Ireland
A List of B roads in Northern Ireland.
Routes are listed proceeding North to South or East to West as appropriate.
| Road | From | To | Route |
| B1 | B176 Downpatrick | A2 at Ardglass | Ardglass Road/Downpatrick Road |
| B2 | A3 at Portadown | via Derrytrasna, Derryadd and Derrymacash to Lurgan, then: | |
| B3 | Border | via Derrynoose, Keady, Tassagh, Markethill, Tandragee, multiplexes with A51 to Gilford, then: | |
| B4 | A35 at Kesh | A505 at Cookstown | via Ederney, Lack, multiplexes with A32 to Omagh, Drumnakilly, Carrickmore and Pomeroy |
| B5 | A20 at Greyabbey | A2 at Ballywalter | - |
| B6 | A49 near Lisburn | A22 at Killyleagh | via Saintfield, Darragh Cross, Raffrey, Derryboy and Shrigley |
| B7 | A2 at Warrenpoint | B6 at Shrigley | via Burren, Mayobridge, Rathfriland, Ballyroney, Moneyslane, Lowtown, Finnis, Dromara, Ballynahinch, Listooder and Crossgar |
| B8 | A25 near Newry | A25 near Kilcoo | via Mayobridge and Hilltown |
| B9 | A26 near Waringstown | A3 at Magheralin | via Donaghcloney |
| B10 | B3 at Scarva | A25 at Rathfriland | via Banbridge and Annaclone |
| B12 | A52 at Crumlin | A3 at Lurgan | via Glenavy, Lower Ballinderry, Aghalee and Aghagallon |
| B14 | A43 near Cargan | A2 at Cushendall | via Tully |
| B15 | B16 near Ballymoney | A2 near Ballintoy | via Armoy, Ballycastle, Carnduff and Ballintoy |
| B16 | B66 at Ballymoney | A44 near The Drones | via Dunaghy and Kilraghts |
| B17 | A29 at Coleraine | A2 near Ballycastle | via Revallagh and Bushmills |
| B18 | B73 at Coagh | A532 at Ballymena | via Moneymore, Loup, Drumenagh, Ballyronan, Toome, Moneyglass and Whiteside's Corner |
| B20 | A2 at Craigavad | B21 at Bangor | via Crawfordsburn |
| B21 | B20 at Bangor | A48 at Donaghadee | Donaghadee Road/High Bangor Road |
| B23 | A49 at Lisburn | A1 Dublin Road, Belfast | via Hillhall, Ballycarn and Ballylesson; Malone Road |
| B25 | A1 near Dromore | A2 at Rostrevor | via Katesbridge, Rathfriland and Hilltown |
| B27 | B8 at Hilltown | A2 at Kilkeel | - |
| B28 | A29 at Charlemont | A50 at Portadown | via Ardress and Drumharriff; Garvaghy Road |
| B30 | A25 near Camlough | Border | via Lislea, Silverbridge, Creggan, Crossmaglen and Cullaville |
| B31 | A29 at Armagh | A29 at Newtownhamilton | via Lisnadill |
| B32 | B3 at Keady | Border | Castleblayney Road via Carnagh |
| B34 | A29 at Dungannon | B106 at Laghey Corner | Killyman Road |
| B35 | A45 at Granville | A28 at Aughnacloy | via Carnteel and Greystone |
| B36 | A34 at Donagh | Border | via Rosslea |
| B38 | B12 at Glenavy | A20 at Belfast | via Hannahstown; Upper Springfield Road/Springfield Road/Grosvenor Road, Belfast |
| B39 | A26 at Antrim | Royal Avenue, Belfast | via Loanends ; Woodvale Road/Shankill Road/Peter's Hill/North Street, Belfast |
| B40 | B74 at Feeny | A31 at Magherafelt | via Moneyneany, Draperstown and Desertmartin |
| B41 | B40 at Draperstown | A29 at Tobermore | Tobermore Road and Tobermore Main Street |
| B42 | A6 near Maghera | B40 at Magherafelt | via Lisnamuck and Tobermore |
| B43 | B4 at Pomeroy | A45 at Dungannon | via Donaghmore and Aghareaney |
| B44 | B40 at Feeny | B74 near Feeny | Altinure Road |
| B45 | A45 at Dungannon | Border | via Eglish and Caledon |
| B46 | A5 at Newtownstewart | A32 at Enniskillen | via Gortin, Rousky, Creggan, Carrickmore, Sixmilecross, Beragh, Seskinore, Fintona, Dromore Trillick, Kilskeery and Ballinamallard |
| B47 | B46 at Newtownstewart | B40 at Draperstown | via Plumbridge, Cranagh, Sperrin and Straw |
| B48 | A5 at Newbuildings | A5 at Omagh | via Donemana, Ballynamallaght, Plumbridge and Gortin |
| B49 | A5 at Strabane and Ballymagorry | B74 at Claudy | via Artigarvan, Donemana and Ballyneaner |
| B50 | A5 at Omagh | B72 Castlederg | via Drumquin |
| B52 | A42 at Portglenone | A6 at Randalstown | via Chesney's Corner |
| B52 | A46 at Belleek | A4 at Belcoo | via Drumlisaleen, Garrison and Holywell |
| B53 | A6 at Randalstown | A36 at Moorfields | via Kells and Moorfields |
| B53 | B52 at Garrison | along shore of Lough Melvin then Border | - |
| B56 | A57 near Ballyclare | A8 at Corr's Corner Roundabout | via Ballypalady |
| B58 | A8 at Ballynure | A2 at Carrickfergus | Carrickfergus Road/New Line Road/Prospect Road |
| B59 | A36 at Ballymena | A8 at Mossley | via Doagh and Ballypalady |
| B62 | A2 at Portrush | A26 at Ballymena | via Ballybogy, Ballymoney, Finvoy, Rasharkin and Cullybackey |
| B64 | A6 at Dungiven | A43 at Martinstown | via Brockagh, Garvagh, Kilrea, McLaughlin's Corner, Rasharkin, Glenvale, Glarryford, Clogh and Newtowncrommelin |
| B66 | A37 at Limavady | A2 at Bushmills | via Ringsend, Aghadowey, Agivey, Bendooragh, Milltown, Ballymoney, Dervock, Derrykeighan and Castlecat |
| B67 | A29 at Coleraine | A44 at Ballycastle | via Ballybogy, Derrykeighan, Toberdoney, Moss-Side and The Dry Arch |
| B68 | B69 at Limavady | A6 at Dungiven | via Scriggan |
| B69 | B74 at Claudy | A2 near Bellarena | via Crindle |
| B70 | B66 at Ringsend | B62 near Rasharkin | via Ballerin; multiplexes with B64 from Garvagh to McLaughlin's Corner |
| B72 | A5 at Strabane | B82 near Killadeas | via Victoria Bridge, Erganagh, Castlederg, Castlegore, Killen and Ederney |
| B73 | A29 at Cookstown | Lough Neagh at Moortown | via Drummullan and Coagh |
| B74 | A6 near Claudy | A6 at Dungiven | via Claudy, Craigdarragh and Feeny |
| B75 | A29 near Maghera | B64 at Kilrea | via Upperlands |
| B77 | A29 at Armagh | A4 at Portadown | via Loughgall |
| B78 | A50 at Portadown | A29 at Newtownhamilton | via Teemore, Mullaghbrack, Markethill and Clady Milltown |
| B79 | Bridge Street, Newry | Merchant's Quay, Newry | Dominic Street/Patrick Street/Upper Edward Street/Corry Square |
| B80 | A4 at Enniskillen | B46 at Fintona | via Garvary, Tempo and Imeroo |
| B81 | A46 near Derrygonnelly | A4 near Enniskillen | via Derrygonnelly and Monea |
| B82 | A35 at Kesh | A32 at Enniskillen | via Lisnarick, Killadeas, Tullvavy and Trory |
| B83 | A5 at Omagh | Border | via Seskinore, Eskra and Clogher |
| B84 | A5 at Newtownstewart | A32 at Dromore | via Drumquin and Milltown |
| B85 | B165 at Clady | B72 at Strabane | Urney Road |
| B86 | B66 at Dervock | B67 at Toberdoney | Toberdoney Road |
| B88 | North Queen Street, Belfast | York Street, Belfast | Frederick Street |
| B90 | A8 at Mossley | near Ballylumford | via Greenisland, Ballycarry and Ballylumford |
| B92 | A2 Loughareema Road | A2 Tromra Road | via Cushendun |
| B93 | B52 at Randalstown | A26 at Cloughmills | via Whiteside's Corner, Ahoghill, Cullybackey, Craigs and Glarryford |
| B94 | A26 at Cloughmills | B95 at Ballyclare | via Cloughmills, Clogh, McGregor's Corner, Quarrytown, Broughshane and Five Corners |
| B95 | B518 at Antrim | via Parkgate, Doagh and Straid | |
| B96 | B64 at Rasharkin | B93 at Cullybackey | via Aughnacleagh, Portglenone and Dreen |
| B97 | A42 at The Sheddings | A2 at Glenarm | Munie Road/Straidkelly Road |
| B98 | A26 near Ballymena | B59 at Chapeltown | via Kells, Connor |
| B99 | B58 near Straid | A2 at Glynn | via Ballynure |
| B100 | B99 near Glenoe | A8 at Kilwaughter | Ballyrickard Road |
| B101 | A26 Nutts Corner Roundabout | A30 Lisburn | via Dundrod and Hillview |
| B102 | A512 at Derriaghy | A501 Falls Road, Belfast | Stewartstown Road/Andersonstown Road/Falls Road |
| B103 | A1 at Lambeg | B23 at Drumbeg | Ballyskeagh Road |
| B104 | B12 at Lower Ballinderry | A3 Moira Road, Lisburn | via Upper Ballinderry and Ballymave |
| B105 | B12 at Aghalee | A3 at Moira | Soldierstown Road/Station Road |
| B106 | B128 at Benburb | via Moy, Laghey Corner and Kingave | |
| B107 | B80 near Tempo | A4 at Fivemiletown | via Clabby |
| B108 | A32 Swanlinbar Road | A509 Derrylin Road | via Kinawley |
| B111 | B77 at Loughgall | A51 at Hamiltonsbawn | via Richhill |
| B112 | B133 Millvale Road | A25 Camlough Road | through Bessbrook |
| B113 | B134 at Forkhill | A1 at Newry | via Dromintee and Meigh |
| B114 | B3 near Markethill | A27 at Poyntzpass | Tannyoky Road via Eleven Lane Ends and Loughgilly |
| B115 | B45 near Benburb | A29 Railway Street, Armagh | Battleford Road |
| B118 | A6 near Drumahoe | A2 near Eglinton | via Eglinton |
| B119 | A2 near Castlerock | A2 near Castlerock | Spur off the A2 to Castlerock |
| B122 | B83 near Omagh | A4 at Fivemiletown | via Fintona |
| B123 | A32 at Irvinestown | B46 at Kilskeery | Old Junction Road |
| B126 | A501 Divis Street, Belfast | A2 York Road, Belfast | Millfield/Carrick Hill/North Queen Street |
| B127 | A34 at Lisnaskea | Border | - |
| B128 | A5 at Aughnacloy | A29 near Allistragh | via Benburb and Blackwatertown |
| B130 | B45 at Greystone | B128 at Benburb | Derryfubble Road |
| B131 | B106 at Tamnamore | B3 near Clare | via Kilmore, Richhill and Milltown |
| B132 | A3 near Middletown | A29 at Keady | Madden Road |
| B133 | A28 at Markethill | A25 at Bessbrook | via Mountnorris |
| B134 | B78 near Markethill | B113 at Forkhill | via Whitecross, Lislea and Mullaghbawn |
| B135 | A29 near Newtownhamilton | B30 at Crossmaglen | via Cullyhanna |
| B136 | A47 near Boa Island | Border | - |
| B140 | B80 near Tempo | B514 at Ballindarragh | via Lisbellaw |
| B143 | A34 at Newtownbutler | B36 at Rosslea | via Magheraveely; crosses Border? |
| B145 | A2 near Portballintrae | A2 near Bushmills | through Portballintrae |
| B147 | B62 at Ballymoney | A2 near Bushmills | via Kirkhills, Stranocum, The Dry Arch and Lagavara; and Causeway Road via Dunseverick |
| B148 | A8 near Larne | A2 at Drumnagreagh Port | via Carncastle |
| B149 | A2 at Kilroot | B99 Glenoe | via Beltoy |
| B150 | A2 at Whitehead | B90 at Mullaghboy | via Ballystrudder |
| B154 | A52 near Dundrod | B38 near Hannahstown | via Dundrod |
| B156 | B12 at Aghagallon | B12 at Glenavy | via Gawley's Gate |
| B158 | B4 at Omagh | B46 at Beragh | Donaghanie Road |
| B160 | B4 at Pomeroy | A31 at Magherafelt | via Stewartstown, Coagh, Ballinderry and Ballyronan |
| B161 | B520 at Coalisland | B160 at Derrycrin | via Killeen, Mourne View and The Diamond |
| B162 | B40 near Moneyneany | A29 at Cookstown | via Labby and Churchtown |
| B164 | B72 near Spamount | B164 at Newtownstewart | via Ardstraw |
| B165 | B85 at Clady | A5 at Newtownstewart | via Kennystown, Victoria Bridge and Douglas Bridge |
| B170 | B505 in Belfast | A2 at Bangor | Belmont Road/Ballymiscaw Road/Whinney Hill/Craigantlet Road/Ballysallagh Road |
| B172 | A48 at Newtownards | A2 at Millisle | Movilla Road/Ballyblack Road East/Moss Road |
| B173 | A20 at Kircubbin | A2 at Cloghy | via Rubane |
| B175 | A24 at Ballynahinch | A25 at Annsborough | via Spa and Drumaroad |
| B176 | A25 at Downpatrick | A2 to Killough | via Ballygilbert |
| B177 | A1 at Hillsborough | A49 at Ballynahinch | via Annahilt |
| B178 | B177 at Hillsborough | A21 near Comber | via Carryduff and Moneyrea |
| B180 | B27 at Hilltown | via Bryansford | |
| B181 | B160 near Magherafelt | Coagh | via The Loup |
| B182 | A42 at Gulladuff | A6 near Toome | via Bellaghy |
| B183 | A6 at Randalstown West junction | A6 at Drumderg Roundabout, Toome | Moneynick Road |
| B186 | A37 at Macosquin | B66 at Ringsend | Cashel Road |
| B186 | B122 at Fintona | A4 at Clogher | Aghafad Road/Fintona Road |
| B188 | B66 at Aghadowey | B207 at Aghadowey | Ballygawley Road |
| B190 | B70 at Ringsend | B64 at Garvagh | Belraugh Road |
| B192 | B69 at Limavady | A6 at Dungiven | Drumrane Road |
| B193 | A40 at Nixons Corner | Killea and across the County Donegal border | Monglass joining the R265 near Newtown Cunningham |
| B194 | A2 Buncrana Road, Derry | B521 Glengalliagh Park, Derry | Racecourse Road |
| B196 | B106 at Tamnamore | M1 Junction 12 | via Mullenakill, Maghery and The Birches |
| B197 | A2 Main Street, Bangor | B20 Ballyholme Road, Bangor | Hamilton Road |
| B198 | A2 Belfast Road, Holywood | A2 Bangor Road, Holywood | Holywood High Street |
| B201 | A2 near Limavady | A29 at Coleraine | Windyhill Road, Carthall Road |
| B202 | A2 near Balarena | Magilligan Point | Point Road |
| B205 | B23 Ballylesson Road, Drumbeg | B23/A55 Milltown Road | Purbysburn Hill/Hospital Road |
| B207 | A29 at Ballylintagh | A54 at Agivey | Moneybrannon Road/Mullaghinch Road |
| B210 | A28 at Caledon | A3 at Middletown | Coolkill Road |
| B501 | A55 North Circular Road, Belfast | A2 York Road, Belfast | Cavehill Road/Limestone Road |
| B502 | A55 Ballysillan Road, Belfast | A52 Crumlin Road, Belfast | Oldpark Road |
| B503 | B126 Millfield, Belfast | A1 Lisburn Road, Belfast | College Avenue/Durham Street/Sandy Row |
| B505 | A23 Castlereagh Road, Belfast | A20 Upper Newtownards Road, Belfast | Beersbridge Road/Holywood Road |
| B506 | A23 Short Strand, Belfast | A24 Ormeau Road, Belfast | Short Strand/Ravenhill Road |
| B507 | A2 Branch Roundabout, Derry | A2 Carlisle Circus, Derry | Branch Road/Northland Road/Francis Street/Fahan Road/Lecky Road/Barrack Street/Abercorn Road |
| B511 | A2 East Circular Road, Groomsport | A2 Donaghadee Road, Groomsport | Bangor Road |
| B513 | A6 Antrim Road, Whitehouse | A2 Shore Road, Whiteabbey | O'Neill Road/Station Road |
| B514 | A4 at Tamlaght | A34 at Lisnaskea | via Carry Bridge and Drumbughas North |
| B517 | A29 Moy Road, Moygashel | B34 Killyman Road, Laghey Corner | Derrycreevy Lane |
| B518 | A26 Ballymena Road, Antrim | A6 Belfast Road, Antrim | Stiles Way/Ballycraigy Road |
| B520 | A29 at Cookstown | A45 at Coalisland | via Tullyhogue and Stewartstown |
| B521 | A2 Branch Roundabout, Derry | A515 Madam's Bank Road, Derry | Glengalliagh Road |
| B523 | A2 Limavady Road, Derry | A6 Glendermott Road, Derry | Clooney Terrace/Simpson's Brae and Irish Street/Belt Road |
| B524 | B507 Northland Road, Derry | A2 Buncrana Road, Derry | Lone Moor Road/Infirmary Road/Clarendon Street |
| B525 | B507 Northland Road, Derry | A2 Buncrana Road, Derry | Duncreggan Road/Pennyburn Pass |
| B526 | B194 Racecourse Road, Derry | A2 Culmore Road, Derry | Greenhaw Road |
| B527 | B507 Northland Road, Derry | B507 Lecky Road, Derry | Springtown Road/Creggan Road/Great James Street/Little James Street/Rossville Road |
| B528 | A2 Foyleside Roundabout, Derry | Whittaker Street, Derry | Foyle Street |
| B529 | B524 Infirmary Road, Derry | B527 Little James Street, Derry | Great James Street |
| B530 | A6 Glendermott Road, Derry | A514 Crescent Link, Derry | Rossdowney Road |
| B533 | A34 at Newtownbutler | A3 at Wattlebridge | - |
| B534 | B82 at Lisnarick | A32 at Irvinestown | Lisnarick Road |
| B535 | B80 at Tempo | A4 at Maguiresbridge | - |
| B536 | B72 at Strabane | B47 at Plumbridge | - |