B21 may refer to:

Places

* Kepong–Selayang Highway (Selangor state route B21), Malaysia * Autovía B-21, Spain; a motorway * Harumi Chūō (station code B21),

Tokyo BRT The 都心と臨海地域を� ...

, Tokyo, Japan * Mikamo Station (station code B21), Higashimiyoshi, Miyoshi, Tokushima, Japan; a train station * Shin-Hōsono Station (station code B21), Seika, Kyoto, Japan; a train station * Sugarloaf Regional Airport (FAA airport code B21), Franklin County, Maine, USA

Transportation and vehicular

* B21 (New York City bus), a bus route serving Brooklyn, New York City, New York State, USA * Unterseeboot B-21, a WW1 German submarine

Automotive

* BSA B21 (1937–1939), a British motorcycle made by Birmingham Small Arms Company, Birmingham, England * Leyland B21 (1979–1985), a bus chassis manufactured by Leyland * Volvo Redblock Engine (B21), an automotive engine * Chevron B21, a racing prototype Group 5 sports car built by Chevron Cars Ltd

Aviation

* Northrop Grumman B-21 Raider, a 21st-century American stealth bomber *

North American XB-21 The North American XB-21 (manufacturer's model designation NA-21) and sometimes referred to by the name "Dragon", was a prototype bomber aircraft developed by North American Aviation in the late 1930s, for evaluation by the United States Army Air ...

("B-21"), an experimental bomber aircraft developed in the late 1930s * B.21/35, British interwar twin-engined bomber

Arts, entertainment, media

* B. 21 ( cs, link=no, Král a uhlíř, , King and Collier), a Czech comic opera by Dvorak * B21 (band), a British bhangra group

Other uses

* B-21 (machine), a cypher machine invented by

Boris Hagelin Boris Caesar Wilhelm Hagelin (2 July 1892 – 7 September 1983) was a Swedish businessman and inventor of encryption machines. Biography Born of Swedish parents in Adshikent, Russian Empire, Hagelin attended Lundsberg boarding school and late ...