ECU

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's 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