JCL may refer to:

• Juniperus Capital Limited, a Bermuda-based hedge fund

• Job Control Language, a scripting language used on IBM mainframe operating systems
• Java Class Library
• Jakarta Commons Logging, a logging utility

• University of Pennsylvania Journal of Constitutional Law
• Journal of Commonwealth Literature
• Journal of Corporation Law
• Journal of Chinese Linguistics
• Journal of Cosmetic & Laser Therapy

• The National Junior Classical League (NJCL) or any of its state-level affiliates
• JCL holds many conventions per year, including art, academic tests, and a game called Certamen

• České Budějovice Airport, České Budějovice, Czechia, IATA code

• J.C.L., degree of Licentiate of Canon Law

• Jatropha curcas (abbreviation of Jatropha curcas Linnaeus)