KB, kB or kb may stand for:

Businesses and organizations

Banks

  • KB Kookmin Bank, South Korea
  • Kaupthing Bank, Iceland
  • Komerční banka, Czech Republic
  • Kasikornbank, Thailand
  • Karafarin Bank, Iran

Libraries

  • National Library of Sweden ()
  • National Library of the Netherlands ()

Sport

  • Kalix BF, a Swedish bandy club
  • Kjøbenhavns Boldklub, a sports club, Copenhagen, Denmark

Other businesses and organizations

  • KB Home, a US house builder
  • KB Lager, Australia
  • KB Toys, US
  • K&B, a New Orleans, Louisiana, US drugstore
  • Druk Air (IATA code: KB), Bhutan airline

Entertainment

  • Kick Buttowski, an American animated series and titular character

People

  • Kevin Bartlett (Australian rules footballer) (born 1947)
  • KB (rapper) (born 1988), Kevin Elijah Burgess
  • KB Killa Beats (born 1983), Zambian record producer
  • Kobe Bryant (1978–2020), American basketball player
  • Kyle Busch (1985–2026), American stock car driver

Science and technology

Biology

  • Kilo-base pair (kb or kbp), length of D/RNA molecule

Computing

  • Kilobit (kb), 1,000 bits
  • Kilobyte (kB), 1,000 bytes
  • Knowledge base
  • Microsoft Knowledge Base ID prefix

Vehicles

  • KB series, International Harvester trucks
  • Isuzu Faster or KB, a pickup truck
  • Isuzu D-Max or KB, a pickup truck
  • NZR K<sup>B</sup> class, a New Zealand steam locomotive

Other uses in science and technology

  • Boltzmann constant, k or k<sub>B</sub>
  • Base dissociation constant K<sub>b</sub>
  • Ebullioscopic constant K<sub>b</sub>, relating molality to boiling point elevation
  • Kauri-butanol value Kb, a measure of solvent performance

Other uses

  • King's Buildings, a University of Edinburgh campus
  • Knowledge Bowl, a quiz competition
  • Former Knight Companion of the Order of the Bath
  • Kuala Belait, a town in Brunei
  • Kota Bharu, a city in Kelantan, Malaysia
  • WWKB, or KB Radio 1520
  • A slang name for marijuana
  • West Kalimantan (vehicle registration prefix KB)