B15 or B-15 may refer to: B15 (New York City bus), a New York City bus line Ampeg Portaflex B-15 bass amplifier, introduced in 1960 HLA-B15, an HLA-B serotype Iceberg B-15, the largest iceberg on record as of 2006 London Buses route B15 Pangamic acid, commonly referred to as B15 Boeing XB-15, a U.S. bomber Bundesstraße 15, a German road Boron-15 (B-15 or 15B), an isotope of boron One of the ECO codes for the Caro–Kann Defence in chess Nissan Sentra chassis code, years 2000–2006 A nickname for Brandon Marshall, Denver Broncos wide receiver LNER Class B15, a class of 20 British steam locomotives