Class B

Class B may refer to:


 * Class B (baseball), a defunct class in minor league baseball in North America
 * Class B (classification), a Paralympic wheelchair fencing classification
 * Class B drug, in British law
 * Class B share, a “class” of common or preferred stock
 * Class B star
 * Barry Railway Class B, a British steam locomotive
 * LNWR Class B, a British steam locomotive
 * Class B office space, a step below Class A office space
 * An Army Service Uniform
 * An airspace class defined by the ICAO
 * A power amplifier class
 * A class of broadcast station in North America
 * An electronic device conforming to FCC rule Title 47 CFR Part 15, Subpart B, Class B
 * An explosives category for professional fireworks; see Fireworks policy in the United States
 * A network in the Internet classful network system
 * A pathogen treatment and pollutant criterion, an EPA reuse category in biosolids
 * A recreational vehicle, or campervan
 * A class of boat in the European Union