Killing Joke are an influential English post-punk rock band formed in 1979. Founding members Jeremy "Jaz" Coleman (vocal, keyboards and arrangements) and Geordie Walker (guitars) have been the only constant members.

Regarded as one of the most significant bands to have emerged from the post-punk/New Wave era of the late-1970s/early-1980s, Killing Joke strongly influenced bands such as Nirvana, Ministry, Nine Inch Nails, Big Black, Prong, Metallica, Jane's Addiction, Soundgarden, Foo Fighters, Econoline Crush, Faith No More and Korn, all of whom have at some point cited a substantial debt of gratitude to 'The Joke'.