ECW

ECW may refer to:

Professional wrestling

• Extreme Championship Wrestling, a professional wrestling promotion that operated from 1992 to 2001
• ECW on TNN, a professional wrestling television program produced by the original promotion from 1999 to 2000
• WCW/ECW Alliance, a 2001 World Wrestling Federation stable that included Extreme Championship Wrestling
• ECW (WWE), a World Wrestling Entertainment brand and television program from 2006 to 2010 based on the Extreme Championship Wrestling promotion

Military

• Electronic counter-warfare, a set of military measures to counteract enemy radars, missile-guidance, etc.
• English Civil War(s), a series of armed conflicts and political machinations which occurred in England from 1642 to 1651

Other

• Eastern Coach Works, a defunct bus body building company from England
• ECW (file format), an enhanced compressed wavelet file format designed for geospatial imagery
• ECW Press, a Canadian book publisher