B
- (Mayo County) Ballyduffy
- (Mayo County) Ballybranagh
- (Mayo County) Briska
- (Mayo County) Ballycroy
- (Mayo County) Barnatra
- (Mayo County) Barroosky
- (Mayo County) Baralty
- (Mayo County) Ballyglass
- (Mayo County) Ballyneety Cross Roads
- (Mayo County) Belladooan
- (Mayo County) Ballinglen
- (Mayo County) Boytown
- (Mayo County) Ballinlena
- (Mayo County) Ballyglass
- (Mayo County) Ballynarick
- (Mayo County) Bunaheraghtish
- (Mayo County) BARNALYRA
- (Mayo County) Blacksod
- (Mayo County) Ballyvary
- (Mayo County) Belderrig
- (Mayo County) Bonniconlon
- (Mayo County) Ballina
- (Mayo County) Barnacuille
- (Mayo County) Bearanach Thiar
- (Mayo County) Barrettsplot West
- (Mayo County) Bleankeragh
- (Mayo County) Bunown
- (Mayo County) Bellaveeny
- (Mayo County) Ballymacsherron
- (Mayo County) Bellanaboy