| Babesland | | | Newtownbabe (?) | F
WS | 1908 | | |
| Babeswood | Cill an Bhábaigh | Townland | | C | 1851 | L | 2003 |
| Bachelor's lane | | | Moneymore | GV | 1851 | | |
| Bachelor's Lane | | | Yellowbatter (Drogheda Town) | T | 1886 | | |
| Bachelor's Walk | | | Townparks (Dundalk) | GV | 1854 | | |
| Bachelor's Walk | | | Yellowbatter (Drogheda Town) | T | 1886 | | |
| Back Lane | | | Liberties of Carlingford | GV | 1854 | | |
| Baggotstown | Baile an Bhagóidigh | Townland | | C | 1851 | L | 2003 |
| Baile na Claigeann | | | Carrickedmond | FWS | 1908 | | |
| Bailyland | Fearann Báille | Townland | | C | 1851 | L | 2003 |
| Bailypark | Páirc an Bháilligh | Townland | | C | 1851 | L | 2003 |
| Balachrath | | | Rath and Rath, Lower | FWS | 1908 | | |
| Balbresk | | | Ballinreask | FWS | 1908 | | |
| Balfeddock | Baile Pheadoc | Townland | | C | 1851 | L | 2003 |
| Balgatheran | Baile Gadráin | Townland | | C | 1851 | L | 2003 |
| Ballabony | Bealach Boinne | Townland | | C | 1851 | L | 2003 |
| Ballagan | Baile Lagáin | Townland | | C | 1851 | L | 2003 |
| Ballast Quay | | | Yellowbatter (Drogheda Town) | T | 1886 | | |
| Ballaverty | Baile Ui Laibheartaigh | Townland | | C | 1851 | L | 2003 |
| Ballemaconlan | | | Ballymascanlan and Carrickcarnan | FWS | 1908 | | |
| Ballenehatten | | | Ballynahattin | FWS | 1908 | | |
| Ballibalia | | | Ballybailie | TAB(A) | 1830? | | |
| Balligatheran | | | Balgatheran | FWS | 1908 | | |
| Ballinagha | | | Beaulieu | FWS | 1908 | | |
| Ballinclare | Baile an Chláir | Townland | | C | 1851 | L | 2003 |
| Ballinfuil | Baile an Phoill | Townland | | C | 1851 | L | 2003 |
| Ballinfull | | | Ballinfuil | L | 2003 | | |
| Ballinlough | Baile an Locha | Townland | | C | 1851 | L | 2003 |
| Ballinloughan | Baile an Locháin | Townland | | C | 1851 | L | 2003 |
| Ballinreask | Baile an Réisc | Townland | | C | 1851 | L | 2003 |
| Ballinteskin | Baile an tSeiscinn | Townland | | C | 1851 | L | 2003 |
| Ballinurd | Baile an Uird | Townland | | C | 1851 | L | 2003 |
| Ballnaghlan | | | Beaulieu | FWS | 1908 | | |
| Balloran | | | Ballyoran | FWS | 1908 | | |
| Ballsgrove | Garrán Bál | Townland | | C | 1851 | L | 2003 |
| Ballug | Baile Loig | Townland | | C | 1851 | L | 2003 |
| Ballybabdryth | | | Ballybarrack | FWS | 1908 | | |
| Ballybailie | Áth Báilleach | Townland | | C | 1851 | L | 2003 |
| Ballybarrack | Baile Bhalraic | Townland | | C | 1851 | L | 2003 |
| Ballybarrack | Baile Bhalraic | Civil Parish | | C | 1851 | L | 2003 |
| Ballybeney | | | Ballybinaby (?) | FWS | 1908 | | |
| Ballybinaby | Baile Binibe | Townland | | C | 1851 | L | 2003 |
| Ballyboirick | | | Ballybarrack | FWS | 1908 | | |
| Ballyboys | Baile Átha Buí | Civil Parish | | C | 1851 | L | 2003 |
| Ballybragan | | | Braganstown | FWS | 1908 | | |
| Ballyconnely | | | Ballymascanlan and Carrickcarnan | FWS | 1908 | | |
| Ballydonnell | Baile Dhónaill | Townland | | C | 1851 | L | 2003 |
| Ballydorn | | | Dromin | FWS | 1908 | | |
| Ballygoly | Bealach gCuaille | Townland | | C | 1851 | L | 2003 |
| Ballygooly | | | Ballygoly | L | 2003 | | |
| Ballygowan | Baile Mhic Gabhann | Townland | | C | 1851 | L | 2003 |
| Ballymageragh | Baile Mhic Fhiachrach | Townland | | C | 1851 | L | 2003 |
| Ballymaglane | Baile Mhic Giolla Eáin | Townland | | C | 1851 | L | 2003 |
| Ballymakellett | Baile Mhic Eileoid | Townland | | C | 1851 | L | 2003 |
| Ballymakenny | Baile Mhic Éinigh | Townland | | C | 1851 | L | 2003 |
| Ballymakenny | Baile Mhic ‰inigh | Civil Parish | | C | 1851 | L | 2003 |
| Ballymakenny Road | | | Yellowbatter | GV | 1854 | | |
| Ballymascanlan | Baile Mhic Scanláin | Townland | | C | 1851 | L | 2003 |
| Ballymascanlan (2 parts) | Baile Mhic Scanláin | Civil Parish | | C | 1851 | L | 2003 |
| Ballymear | | | Mell and Sheepgrange | FWS | 1908 | | |
| Ballynagassan | Béal Átha na gCasán | Townland | | C | 1851 | L | 2003 |
| Ballynagrena | Baile na Gréine | Townland | | C | 1851 | L | 2003 |
| Ballynahattin | Baile na hAitinne | Townland | | C | 1851 | L | 2003 |
| Ballynamaghery | Baile na Machaire | Townland | | C | 1851 | L | 2003 |
| Ballynamony (Bradshaw) | Baile na Móna (Bradshaw) | Townland | | C | 1851 | L | 2003 |
| Ballynamony (Murphy) | Baile na Móna (Murphy) | Townland | | C | 1851 | L | 2003 |
| Ballyonan | Baile Ui Mhaonáin | Townland | | C | 1851 | L | 2003 |
| Ballyoran | Baile Odhráin | Townland | | C | 1851 | L | 2003 |
| Ballypatrick | | | Belpatrick | FWS | 1908 | | |
| Ballyregan | Baile Ui Réigín | Townland | | C | 1851 | L | 2003 |
| Ballyshone | | | Dromiskin | FWS | 1908 | | |
| Ballytrasna (Civil Parish of Carlingford) | An Baile Trasna | Townland | | C | 1851 | L | 2003 |
| Ballytrasna (Civil Parish of Killanny) | An Baile Trasna | Townland | | C | 1851 | L | 2003 |
| Ballyvarn | | | Barronstown | FWS | 1908 | | |
| Balregan | Baile Ui Réigín | Townland | | C | 1851 | L | 2003 |
| Balresk | | | Ballinreask | FWS | 1908 | | |
| Balriggan | Baile Uiginn | Townland | | C | 1851 | L | 2003 |
| Balrobin | Baile Roibín | Townland | | C | 1851 | L | 2003 |
| Balroddie | | | Milltown (?) (Dromiskin Parish) | FWS | 1908 | | |
| Baltereston | | | Walterstown | FWS | 1908 | | |
| Baltrasna | An Baile Trasna | Townland | | C | 1851 | L | 2003 |
| Baltray | Baile Trá | Townland | | C | 1851 | L | 2003 |
| Baltray | | | Dromiskin | FWS | 1908 | | |
| Baltray Town | | | Baltray | GV | 1854 | | |
| Bankerstown | Rois Bhuí | Townland | | C | 1851 | L | 2003 |
| Banktown | Baile an Bhainc | Townland | | C | 1851 | L | 2003 |
| Barabona | Bóthar an Bhainne | Townland | | C | 1851 | L | 2003 |
| Barmeath | Bearna Mheá | Townland | | C | 1851 | L | 2003 |
| Barminrath | | | Barmeath (?) | FWS | 1908 | | |
| Barn Hill | | | Termonfeckin | FWS | 1908 | | |
| Barnattin | | | Killineer | FWS | 1908 | | |
| Barnaveddoge | Barr na bhFeadóg | Townland | | C | 1851 | L | 2003 |
| Barrack Lane | | | Lagavooren | GV | 1854 | | |
| Barrack Lane | | | Lagavooren (Drogheda Town) | T | 1886 | | |
| Barrack Street | | | Townparks (Dundalk) | GV | 1854 | | |
| Barrack Street | | | Lagavooren (Drogheda Town) | T | 1886 | | |
| Barrett's Lane | | | Townparks (Ardee) | GV | 1854 | | |
| Barronstown | Baile Bharúin | Townland | | C | 1851 | L | 2003 |
| Barronstown | Baile Bharúin | Civil Parish | | C | 1851 | L | 2003 |
| Baskervill Rath | | | Mooretown (?) | FWS | 1908 | | |
| Battsland | Talamh Bhait | Townland | | C | 1851 | L | 2003 |
| Bavan | An Bábhún | Townland | | C | 1851 | L | 2003 |
| Bawn | An Bábhún | Townland | | C | 1851 | L | 2003 |
| Bawntaaffe | Bábhún an Táthaigh | Townland | | C | 1851 | L | 2003 |
| Beaulieu | Béilinn | Townland | | C | 1851 | L | 2003 |
| Beaulieu | Béilinn | Civil Parish | | C | 1851 | L | 2003 |
| Beggar's Row | | | Townparks (Ardee) | GV | 1854 | | |
| Begrath | Beagráth | Townland | | C | 1851 | L | 2003 |
| Belachrath | | | Grange, Irish | FWS | 1908 | | |
| Bellcotton | Láithreach Minsí | Townland | | C | 1851 | L | 2003 |
| Bellmount | | | Carlingford | FWS | 1908 | | |
| Bellurgan (Civil Parish of Ballyboys) | Baile na Lorgan | Townland | | C | 1851 | L | 2003 |
| Bellurgan (Civil Parish of Castletown) | Baile na Lorgan | Townland | | C | 1851 | L | 2003 |
| Belpatrick | Buaile Phádraig | Townland | | C | 1851 | L | 2003 |
| Beltichburne | Baile Tichburne | Townland | | C | 1851 | L | 2003 |
| Beltrasna | | | Baltrasna | TAB(A) | 1830? | | |
| Ben Rock | | | Anaverna (?) | FWS | 1908 | | |
| Benagh | An Beannach | Townland | | C | 1851 | L | 2003 |
| Bessex Well Lane | | | Moneymore | GV | 1851 | | |
| Bessexwell Lane | | | Yellowbatter (Drogheda Town) | T | 1886 | | |
| Betaghstown | Baile an Bhiataigh | Townland | | C | 1851 | L | 2003 |
| Beul teine | | | Kilcurry (?) | FWS | 1908 | | |
| Beymore Road | | | Lagavooren | GV | 1851 | | |
| Beymore Road | | | Lagavooren (Drogheda Town) | T | 1886 | | |
| Big Field, The | | | Haynestown (?) | M(n) | 1930 | | |
| Big Furze | | | Callystown | FWS | 1908 | | |
| Big Woman's Grave | | | Corrakit | FWS | 1908 | | |
| Bigsland | Baile an Bhigigh | Townland | | C | 1851 | L | 2003 |
| Black Gate, The | | | Williamstown | PSE | 1938 | | |
| Black Meadows | | | Curraghbeg | FWS | 1908 | | |
| Black Mountain | | | Jenkinstown | FWS | 1908 | | |
| Black Ridge | | | Townparks (Ardee) | GV | 1854 | | |
| Black Road | | | Roodstown | FWS | 1908 | | |
| Black Rock | | | Haggardstown | FWS | 1908 | | |
| Blackbut Lane | | | Lagavooren (Drogheda Town) | T | 1886 | | |
| Blackhall | An Halla Dubh | Townland | | C | 1851 | L | 2003 |
| Blackiston | | | Blakestown | FWS | 1908 | | |
| Blackrock Village | | | Haggardstown | GV | 1854 | | |
| Blackstick | An Maide Dubh | Townland | | C | 1851 | L | 2003 |
| Blackstick | | | Blackstick | TAB(A) | 1830? | | |
| Blaitch, The | | | Mullincross | PSE | 1938 | | |
| Blakestown | Baile an Bhlácaigh | Townland | | C | 1851 | L | 2003 |
| Blind Gate | | | Yellowbatter (Drogheda Town) | T | 1886 | | |
| Boates Bridge | | | Ardee (?) | FWS | 1908 | | |
| Bodestrata | | | Moneymore and Yellowbatter (Shop Street) | JB | 1997 | | |
| Bog Field | | | Haynestown (?) | M(n) | 1930 | | |
| Bog Meadow | | | Castlebellingham | M(n) | 1930 | | |
| Bogberry Hill | | | Glack | FWS | 1908 | | |
| Bogtown | Baile an Churraigh | Townland | | C | 1851 | L | 2003 |
| Bogtown | | | Dromiskin | FWS | 1908 | | |
| Boharboy | | | Muchgrange | FWS | 1908 | | |
| Boharnamoe | Bóthar na mBó | Townland | | C | 1851 | | |
| Boherglass | | | Yellowbatter | GV | 1854 | | |
| Bolies | Na Buailte | Townland | | C | 1851 | L | 2003 |
| Bolton Street | | | Moneymore | GV | 1851 | | |
| Bolton Street | | | Moneymore (Drogheda town) | T | 1886 | | |
| Bongrogey | | | Toberdoney | FWS | 1908 | | |
| Bornamo | | | Boharnamoe | TAB(A) | 1830? | | |
| Bosgraville's Rath | | | Mooretown (?) | FWS | 1908 | | |
| Bothe Street | | | Moneymore and Yellowbatter (Shop Street) | JB | 1997 | | |
| Bowden's Lane | | | Mell | GV | 1851 | | |
| Bowden's Lane | | | Moneymore (Drogheda town) | T | 1886 | | |
| Boycetown | Baile Bhois | Townland | | C | 1851 | L | 2003 |
| Boyne Place | | | Moneymore (Drogheda town) | T | 1886 | | |
| Boyne River | | | Mell | GV | 1851 | | |
| Boyne Terrace | | | Yellowbatter | GV | 1851 | | |
| Braden Street | | | Yellowbatter | GV | 1854 | | |
| Braganstown | Baile Ui Bhragáin | Townland | | C | 1851 | L | 2003 |
| Braghan | Brachán | Townland | | C | 1851 | L | 2003 |
| Branagan's Cross | | | Collon | FWS | 1908 | | |
| Bredin Street | | | Yellowbatter (Drogheda Town) | T | 1886 | | |
| Brennan's Field | | | Haynestown (?) | M(n) | 1930 | | |
| Briarhill | Cnoc na nDriseog | Townland | | C | 1851 | L | 2003 |
| Bridge Street | | | Townparks (Ardee) | GV | 1854 | | |
| Bridge Street | | | Townparks (Dundalk) | GV | 1854 | | |
| Bridge-a-Crin | | | Stumpa and Falmore | FWS | 1908 | | |
| Brittas | An Briotás | Townland | | C | 1851 | L | 2003 |
| Broadlough | An Loch Leathan | Townland | | C | 1851 | L | 2003 |
| Broadlough | | | Broadlough | TAB(A) | 1830? | | |
| Broughattin | Bruach Aitinne | Townland | | C | 1851 | L | 2003 |
| Brownstown | Baile Bhrún | Townland | | C | 1851 | L | 2003 |
| Bull Ring | | | Lagavooren | GV | 1851 | | |
| Bull Ring | | | Lagavooren (Drogheda Town) | T | 1886 | | |
| Burke's Land | | | Willville | FWS | 1908 | | |
| Burren | An Bhoirinn | Townland | | C | 1851 | L | 2003 |
| Bush | | | Ballaverty | FWS | 1908 | | |
