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 (born 1985), 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^B class, a New Zealand steam locomotive

Other uses in science and technology

* Boltzmann constant, ''k'' or ''k''_B * Base dissociation constant ''K''_b * Ebullioscopic constant K_b, 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 {{disambiguation