Regions of Ireland
- Byrnesgrove
- Buttevant Castle
- Buttevant
- Butlerstown Castle
- Butlerstown
- Butlersbridge
- Bushypark House
- Bushville
- Bushfield
- Bushfield
- Busherstown House
- The Bush
- Burtown Cross Roads
- Burtonport
- Burton Park
- Burton Hall
- Burrow
- Burrishoole Bridge
- Burren River
- Burren
- Burnham
- Burnfort
- Burnfoot
- Burncourt
- Burkestown Cross Roads
- Burford Bank
- Bunree
- Bunratty West
- Bunratty River
- Bunratty East
- Bunratty
- Bunowen River
- Bunowen River
- Bunowen Bay
- Bunoke River
- Bunnyconnellan
- Lough Bunny
- Bunnanaddan
- Bunnahowen
- Bunmahon
- Bunlough Point
- Bunlahy
- Bunlacken
- Bunglass
- Bunglass
- Bundorragha
- Bundoran
- Buncrowey River
- Buncraggy House
- Bunclody
- Bunbrosna
- Bunbeg
- Bunaw
- Bunatrahir Bay
- Bullys Corner
- Bulls Head
- Bullaun
- The Bull
- Bulgaden
- Bulbin
- Brusna River
- Bruree
- Bruff
- Bruckless
- Brownswood
- Brownstown House
- Brownstown Head
- Brownsmills
- Brownsford House
- Brownsbarn House
- Brownsbarn Bridge
- Brownhall
- Brownhall Demesne
- Brownes Hill House
- Brownes Grove
- Brown Bay
- Brow Head
- Broughal Castle
- Broughal
- River Brosna
- Brosna
- Brosna
- Broomfield
- Brookville
- Brook Lodge
- Brooklodge
- Brooklawn House
- Brookhill
- Brookfield House
- Brogeen River
- Brodagh House
- Brockley Park
- Brockagh
- Broadway
- Broadstone Terminus
- Broad Meadow Water
- Broadhaven Bay
- Broadford
- Broadford
- Brittas Lough
- Brittas House
- Brittas Bay
- Brittas
- Brittas
- Brittas
- Britfieldstown House
- Briskil Upper
- Briskil Lower
- Brinny River
- Brinlack
- Lough Brin
- Bridgetown
- Bridgetown
- Bridgetown
- Bridgetown
- Bridget Lough
- Bridgeland
- Bridge End
- Brideswell
- Brides Head
- Bridebridge
- River Bride
- River Bride
- River Brickey
- Bricketstown House
- Brickeens
- River Brick
- Breenagh
- Breemount
- Breedoge River
- Breedoge
- Bree
- Bredagh River
- Breanagh River
- Breaghwy
- Bray Head
- Bray Head
- Bray Bank
- Bray
- Brannock Islands
- Brandon Point
- Brandon Mountain
- Brandon Hill
- Brandon Head
- Brandon Bay
- Brandon
- Bradoge River
- Brade House
- Braddocks
- Bracknagh
- Bracklyn
- Brackley Lough
- Brackley House
- Brackhill
- Brackenstown House
- Brabazon Park
- Boytonrath House
- Boystown
- River Boyne
- Boyle River
- Boyle
- Boylagh Bay
- Bow River
- Bourney
- Bourne Vincent Memorial Park
- Boultypatrick
- Boughil
- Bottlehill
- Boston
- Boston
- Borrisoleigh
- Borrisokane
- Borris in Ossory
- Borris House
- Borris
- Boro River
- Boro Bridge
- Borim
- Boora River
- Lough Boora
- Boolyglass
- Boolteens
- Boolakennedy
- Bonnetstown Hall
- Bonet River
- Bolus Head
- Lough Bollard
- Boliska Lough
- Boleyvogue
- Lough Bola
- Bohola
- Bohernabreena House
- Bohermeen
- Boherglass
- Boherduff
- Boherbue
- Boheraphuca
- Boher
- Bohaun
- Boghadoon