B15

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