B
- (Wexford) Ballynestragh Demesne
- (Kildare) Broadleas Commons
- (Kildare) Bishopslane
- (Kildare) Bishopsland
- (Kildare) Brumlin
- (Kildare) Black Hill
- (Kildare) Blackhall
- (Kildare) Baysland
- (Kilkenny) Byrnesgrove
- (Wexford) Bushville
- (Kildare) Burtown Cross Roads
- (Wexford) Burrow
- (Wexford) Burkestown Cross Roads
- (An Longfort) Bunlahy
- (Laois) Bunlacken
- (Kildare) Bunglass
- (Westmeath) Bunbrosna
- (County Carlow) Bullys Corner
- (Wexford) Brownswood
- (Kilkenny) Brownsbarn Bridge
- (Uíbh Fhailí) Broughal
- (Uíbh Fhailí) Brosna
- (Wexford) Broadway
- (An Longfort) Briskil Upper
- (An Longfort) Briskil Lower
- (Wicklow) Bridgeland
- (Uíbh Fhailí) Bracknagh
- (Wicklow) Boystown
- (Wexford) Boro Bridge
- (Kilkenny) Boolyglass