ECL may refer to:
Science and technology Electrochemiluminescence Enhanced chemiluminescence Emitter-coupled logic Enterochromaffin-like cell
Computing ECL programming language, an extensible programming language ECL (data-centric programming language) Embeddable Common Lisp
Sport 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 Entertainers Cricket League (Cricket), an Indian cricket league organized by social media celebrities
Other uses 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