Regions of United Kingdom
- Bo Ban
- Boat of Garten
- Boath
- Boarstall
- Boars Head Rock
- Boarhills
- Boardmills
- Loch of Boardhouse
- Boa Island
- The Boa
- Blyton
- Blythe Water
- Blythe Bridge
- River Blythe
- Blythburgh
- River Blyth
- River Blyth
- Blyth
- Blyth
- Blymhill
- Blyford
- Blyborough
- Bluntisham
- Blunsdon Saint Andrew
- Blunham
- Blundellsands
- Bluemull Sound
- Blue Mull
- Blue Anchor
- Blubberhouses
- Bloxworth
- Bloxwich
- Bloxholm
- Bloxham
- Blore
- Bloomsbury
- Bloody Bridge
- Blofield
- Blockley
- Bloch Hill
- Blitterlees
- Blithfield Hall
- River Blithe
- Blisworth
- Blisland
- Blindman
- Blindley Heath
- Blindhaugh Burn
- Blidworth
- Blickling
- Blewbury
- Bletsoe
- Bletherston
- Bletchley
- Bletchingley
- Bletchingdon
- Blervie Castle
- Blenheim Palace
- Blencogo
- Blencarn
- Blelack House
- Bledlow
- Bledington
- Bleddfa
- Blea Wyke Point
- Bleasby
- Blean
- Bleaklow Hill
- Bleadon
- Blea Beck
- Blaydon-on-Tyne
- Blaxhall
- Blabheinn
- Blatherwycke
- Blankney
- Blaney
- Blane Water
- Blanerne
- Blanefield
- Blandford Forum
- Blanchland
- Blake Street Station
- Blakesley
- Blakeney Overfalls
- Blakeney Knock
- Blakeney
- Blakeney
- Blakemere
- Blakehope Burn
- Blakehill Farm
- Loch of Blairs
- Blairquhan
- Blairmore
- Blairhoyle
- Blairhall
- Blairgowrie
- Blair Drummond
- Blair Castle
- Blair Atholl
- Blair Atholl
- Blairadam
- Mount Blair
- Loch Blàir
- Blainslie
- Blaina
- Blain
- Blaich
- Blagdon Hall
- Blagdon
- Blagberry
- Blae Rock
- Blaenporth
- Blaenpenal
- Blaengarw
- Blaenavon
- Blaenau-Ffestiniog
- Bladon
- River Bladnoch
- Bladnoch
- Blackwood
- Blackwood
- Blackwell
- Blackwatertown
- Blackwater Reservoir
- Blackwater Lodge
- Blackwaterfoot
- River Blackwater
- River Blackwater
- Black Water
- Black Water
- Black Water
- Black Water
- Black Water
- Black Water
- Black Water
- Black Water
- Blackwater
- Blackwater
- Blackwall Reach
- Blackwall
- Black Torrington
- Blacktoft
- Blackthorn
- Blackstone Point
- Blackstone Edge
- Blackston
- Black Stane
- Blacksmill Burn
- Black Skerry
- Black Skerry
- Blackshiels
- Blackshawmoor Farm
- Blackshaw Moor
- Black Sark
- Blackrod
- Black Rock Ledge
- Black Rock
- Blackrock
- Black River
- Blackpool
- Black Notley
- Black Mountains
- Black Mountain
- Black Mount
- Black Mount
- Blackmore Park
- Blackmore
- Blackmill
- Blackmill
- Black Lyne
- Black Loch
- Black Loch
- Black Loch
- Blackleg Rock
- Black Law
- Blacklorg Hill
- Black Laggan
- Black Isle
- Black Islands
- Blackhope Burn
- Black Holm
- Black Hill
- Black Hill
- Blackheath
- Black Head
- Black Head
- Black Head
- Black Head
- Black Halls Rocks
- Blackhall Castle
- Blackguard Sand
- Blackgang Chine
- Blackfriars Railway Station
- Blackfort
- Blackford Hill
- Blackford
- Blackford
- Blackfen
- Black Fell
- Black Esk