JCO
# JCO

JCO as an acronym may stand for:

* JCO (company), a Japanese nuclear fuel cycle company involved in the Tokaimura nuclear accident
* Jamaican Caves Organisation
* Jewish Combat Organization, a Jewish resistance group during World War II
* Journal of Clinical Oncology, a leading medical journal
* Joyce Carol Oates, American author
* Junior commissioned officer, a group of military ranks in the armies of India and Pakistan
* Junkers, a former German aircraft manufacturer
