JCB may refer to:
* JCB (company), a British manufacturer of heavy industrial and agricultural vehicles
* JCB Co., Ltd., originally Japan Credit Bureau, a credit card company based in Tokyo, Japan
* JCB Prize, a literary award sponsored by the company JCB
* JCB (song), "JCB" (song), a 2005 song by Nizlopi featuring a JCB excavator
* ''Journal of Cell Biology'', a weekly biology journal published by the Rockefeller University Press
* ''Journal of Crustacean Biology'', a quarterly biology journal specialising in carcinology
* ''Juris Canonici Baccalaureus'', Bachelor of Canon law degree
* University of Toronto Joint Centre for Bioethics, a research center
* Jimmy Carl Black, American musician
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