ECU may refer to:
Currencies European Currency Unit, precursor to the euro Écu, French coins of the 13th–19th centuries
Technology Electronic control unit Engine control unit
Universities East Carolina University, in Greenville, North Carolina, United States East Central University, in Ada, Oklahoma, United States Edith Cowan University, in Perth, Australia Emily Carr University of Art and Design, in Vancouver, Canada
Other uses Eastman Credit Union, an American credit union ÉCU The European Independent Film Festival Ecuador, UNDP country code Eighth Creative Union of MEPhI, a Russian theatre company End Citizens United, a PAC working to get big money out of politics European Chess Union Evidence Control Unit Extensor carpi ulnaris muscle Extreme close-up