- Bingo Creek Landing
- Bird Island
- Birding Island
- Bishop Island
- Black Bear
- Black Canyon
- Black Pine
- Blackbird
- Blackburn Island
- Blackcloud
- Blackfoot
- Blackrock
- Blacks Creek
- Blacks Island (historical)
- Blacktail
- Blackwell
- Blackwell Island
- Blaine
- Blaine
- Blake
- Blanchard
- Blind Island
- Bliss
- Bloomington
- Blue Dome
- Boehls
- Bogle
- Boise
- Boise Hills Village
- Boise Junction