ECW may refer to:

Professional wrestling

* Extreme Championship Wrestling (originally Eastern Championship Wrestling), a professional wrestling promotion that operated from 1992 to 2001 * The Alliance (professional wrestling) (originally the WCW/ECW Alliance), a 2001 World Wrestling Federation stable that included Extreme Championship Wrestling * ECW (WWE brand), a World Wrestling Entertainment brand from 2006 to 2010 based on the Extreme Championship Wrestling promotion

Wrestling television programs

* '' ECW Hardcore TV'', produced by the Extreme Championship Wrestling promotion from 1993 until 2000 * '' ECW on TNN'', produced by the Extreme Championship Wrestling promotion from 1999 to 2000 * '' WWE ECW'', produced by World Wrestling Entertainment 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 model in chemistry for Lewis acid–Lewis base interactions *

ECW Press ECW Press is a Canadian book publisher located in Toronto, Ontario. It was founded by Jack David and Robert Lecker in 1974 as a Canadian literary magazine named ''Essays on Canadian Writing''. They started publishing trade and scholarly book ...

, a Canadian book publisher {{Disambiguation