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)