- Boomdecker
- Boot Hill
- Brantwood
- Brantwood Farms
- Brewster Heights
- Boonsboro
- Bowie
- Bowleys Quarters
- Braddock Heights
- Brandywine
- Brookeville
- Brookmont
- Brookview
- Bryans Road
- Baltimore Corner
- Belmont Acres
- Bloomery
- Boonsboro
- Bradley Heights
- Brick Wall Landing
- Buckels Corner
- Bureau
- Burrsville
- Burkittsville
- Burtonsville
- Babel Heights
- Babylon Heights
- Bachman Mills
- Bachman Valley Estates
- Baile