B15 may refer to:* B15 (New York City bus) in Brooklyn HLA-B15, an HLA-B serotype Iceberg B-15, the largest iceberg on record as of 2006 London Buses route B15 and also : Bundesstraße 15, a German road Boeing XB-15, a US bomber One of the ECO codes for the Caro-Kann Defence in chess Nissan Sentra chassis code, years 2000-2006 A nickname for Denver Broncos wide receiver Brandon Marshall… (More on B-15)