- Belgrade Trailer Court
- Belgrade Village Mobile Home Park
- Belknap
- Bell Crossing
- Bell Ranch Colony
- Belle Creek
- Belle-Vue Court
- Bellevue Manor Trailer Park
- Belltower
- Belmont
- Belt Creek
- Benchland
- Bend
- Benteen
- Benz
- Benzien
- Bernice
- Berts Trailer Court
- Biddle
- Biem
- Big Arm Mobile Home Park
- Big Island
- Big Marys Island
- Big Pines Mobile Court
- Big Sag
- Big Sandy Trailer Court
- Big Sky Canyon Village
- Big Sky Colonial Manor
- Big Sky Colony
- Big Sky Meadow Village