- Baden
- Bagtown
- Bakersville
- Ballenger Creek
- Baltimore Highlands
- Barclay
- Barnesville
- Barrelville
- Barton
- Bartonsville
- Beaver Creek
- Bel Air
- Bel Air
- Bel Air North
- Bel Air South
- Beltsville
- Benedict
- Bennsville
- Berlin
- Berwyn Heights
- Betterton
- Bier
- Big Pool
- Big Spring
- Bishopville
- Bivalve
- Bladensburg
- Bloomington
- Boonsboro
- Bowleys Quarters
- Bowling Green
- Bowmans Addition
- Braddock Heights
- Brandywine
- Breathedsville
- Brentwood
- Brock Hall
- Brookeville
- Brooklyn
- Brooklyn Park
- Brookmont
- Brookview
- Broomes Island
- Brownsville
- Bryans Road
- Bryantown
- Buckeystown
- Burkittsville
- Burtonsville
- Butcher's Hill
- Butlertown
