- Black Bridge
- Blackhill
- Blacklion
- Blindennis
- Boolyvannanan
- Borough
- Borris
- Brownbog
- Bullys Corner
- Burren Bridge
- Ballyfermot
- Ballymun
- Beaumont
- Bull Island
- Balally
- Ballybrack
- Ballycorus
- Ballyogan
- Blackrock
- Boranaraltry
- Balcunnin
- Baldongan
- Baldoyle
- Baldwinstown
- Balgriffin
- Ballisk
- Ballough
- Ballyboughal
- Ballycoolen
- Ballymadun