- Beatty
- Blacks Creek
- Boise Hills Village
- Boise Junction
- Bacon
- Bear
- Beer Bottle Crossing
- Basalt
- Blackrock
- Bear Lake Hot Springs
- Bear Lake Sands
- Blackfoot
- Bliss
- Benewah
- Boise
- Bonners Ferry
- Banner
- Bear Creek Summer Home Area
- Big Eddy
- Brownlee
- Bovill
- Buhl
- Burley
- Butte City
- Barite
- Bird Island
- Boulder
- Broadford
- Bullion
- Bartoo Island