- Bellagill Bridge
- Bellanamallaght
- Belleek
- Belmont
- Benmore
- Big Island
- Birmore Island
- Blean
- Boggaun
- Boghilmore Island
- Bohaboy
- Bohoona
- Boley
- Boleybeg
- Bookeen
- Boolard Island
- Boston
- Boulard
- Braadillaun
- Brackery
- Brackloon
- Brannock Islands
- Breanloughaun
- Bullaun
- Bullaun
- Bundouglas
- Bungowla
- Bunnagippaun
- Bunnaglass
- Burke Ville