B
- (Wicklow) Ballylow
- (Wicklow) Ballynatona
- (Wicklow) Ballysmuttan
- (Wicklow) Bahana
- (Wicklow) Ballyorney
- (Wicklow) Ballycoyle
- (Wicklow) Barnamire
- (Wicklow) Ballybrew
- (Wicklow) Ballyfolan
- (Dún Laoghaire-Rathdown) Ballycorus
- (Dún Laoghaire-Rathdown) Boranaraltry
- (Kildare) Badgerhill
- (South Dublin) Belgard
- (South Dublin) Ballymount
- (Dún Laoghaire-Rathdown) Ballybrack
- (Fingal County) Balgriffin
- (Fingal County) Belcamp
- (Fingal County) Ballycoolen
- (Wicklow) Ballyteige
- (Fingal County) Beldaragh
- (Fingal County) Balrickard
- (Fingal County) Balcunnin
- (Fingal County) Baldongan
- (Meath) Bellewstown
- (Meath) Bush
- (Fingal County) Balscaddan
- (Meath) Beaumont
- (Louth) Baldoyle
- (Louth) Beltichburne
- (Louth) Black Hall Cross