WWE ECW (officially known as simply ECW and colloquially known as ECW on Sci-Fi or ECW on Syfy and WWECW, a portmanteau of both "WWE" and "ECW") is an American professional wrestling television program that was produced by WWE, based on the independent Extreme Championship Wrestling (ECW) promotion that lasted from 1992 to 2001. The show's name also referred to the ECW brand, in which WWE employees were assigned to work and perform, complementary to WWE's other brands, Raw and SmackDown.

ECW debuted on June 13, 2006, on Sci Fi in the United States and Global Television Network in Canada on Saturday mornings and ran until its final episode on February 16, 2010, on the rebranded Syfy. It was replaced the following week with WWE NXT. Every episode is available for on-demand viewing via the WWE Network and Peacock.

Throughout the shows existence, ECW had been broadcast from over 120 arenas, over 80 cities and towns, and four countries: United States, Canada, United Kingdom, and Italy in 2007.