- Beaver Creek
- Belgrade
- Big Sandy
- Broadview
- Browning
- Ball Place
- Beacon Point
- Beals
- Big Sky Mountain Village
- Bowman Place
- Brandon
- Burdick Place
- Bill Bracket Place
- Bruce Place
- Bruno
- Buckingham
- Borax
- Bryson
- Barite
- Big Pines Mobile Court
- Bitterroot Gateway Trailer Court
- Blue Mountain Trailer Park
- Bonner Junction
- Bonner-West Riverside
- Bundy
- Brisbin
- Bone Crossing
- Birch Creek Colony
- Blair Crossing
- Bay Horse