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
See also B-class (disambiguation) Class A (disambiguation) Class C (disambiguation) Type B (disambiguation)