- 4 Balderston and Hutton (Firm)
- 1 Balderston, Charles, Architect
- 1 Baldwin Building
- 10 Baldwin Locomotive Works
- 5 Baldwin locomotives
- 1 Baldwin, Edward, 1803-1990
- 2 Baldwin, Matthias W. (Matthias William), 1795-1866
- 1 Baldwin, William Steel Works
- 2 Balendonck, Armand
- 4 Balkan Peninsula
- 1 Ball & chain
- 4 Ballads (documents)
- 1 Ballantine, James, 1808-1877
- 2 Ballard, James
- 6 Ballet
- 5 Ballet dancers
- 2 Ballet slippers
- 1 Ballets (performance events)
- 1 Ballinger & Perrot, Architects
- 7 Ballooning
- 4 Balloons (aircraft)
- 3 Balloons (toys)
- 1 Ballot boxes
- 1 Ballots
- 1 Ballroom dancing
- 1 Balls (parties)
- 3 Balls (Sporting goods)
- 1 Ball's Inn
- 1 Balmoral House
- 1 Balthasar Mosdorfer (Firm)
- 1 Baltimore and Ohio Railroad
- 1 Baltimore and Ohio Railroad Station
- 13 Baltimore Avenue
- 1 Baltimore Avenue
- 3 Baltimore County, Maryland
- 1 Baltimore Pike (Gettysburg, Pennsylvania)
- 4 Baltimore, Maryland
- 3 Balustrades
- 3 Bamboo
- 1 Bamboo (plant)
