ECL may refer to:

Science and technology[edit]

• Electrochemiluminescence
• Enhanced chemiluminescence
• Emitter-coupled logic
• Enterochromaffin-like cell

Computing[edit]

• ECL programming language, an extensible programming language
• ECL (data-centric programming language)
• Embeddable Common Lisp

Sport[edit]

• East Cornwall League, an English football league
• Eastern Colored League, a defunct American baseball league
• Eastern Counties Football League, in England
• European Cricket League, a professional cricket league organized by ICC member federations
• UEFA Europa Conference League, annual football club competition organised by UEFA
• European Champions League (table tennis), annual table tennis club competition

Other uses[edit]

• Eccleston Park railway station, in England
• Ecolab, a sanitation supply company
• École centrale de Lyon, a graduate engineering school in Lyon, France
• Educational Community License, a software license
• Exit Control List, system of border control maintained by the Government of Pakistan
• Extended collective licensing, collective copyright and related rights laws and licensing agreement