Killing Joke are an English rock band from Notting Hill, London, England, formed in 1979 by Jaz Coleman (vocals, keyboards), Paul Ferguson (drums), Geordie Walker (guitar) and Youth (bass).

Their first album, Killing Joke, was released in 1980. After the release of Revelations in 1982, bassist Youth was replaced by Paul Raven. The band achieved mainstream success in 1985 with both the album Night Time and the single "Love Like Blood".

The band's musical style emerged from the post-punk scene, but stood out due to their heavier approach, and has been cited as a key influence on industrial rock. Their style evolved over many years, at times incorporating elements of gothic rock, synthpop and electronic music, often baring Walker's prominent guitar and Coleman's "savagely strident vocals". Killing Joke have influenced many later bands and artists, such as Metallica, Nirvana, Nine Inch Nails and Soundgarden. Although Coleman and Walker have been the only constant members of the band, the current line-up features all four original members.

Paul Ferguson was the drummer in the band Matt Stagger when he met Jaz Coleman (from Cheltenham, Gloucestershire) in Notting Hill, London in late 1978. Coleman was briefly the keyboard player in that band. He and Ferguson then left to gradually piece together Killing Joke. In the following months, they placed advertisements in Melody Maker and other music papers. Guitarist Geordie Walker joined them in March 1979, followed by bassist Youth. The band was formed in June 1979. Coleman said their manifesto at the time was to "define the exquisite beauty of the atomic age in terms of style, sound and form". Coleman gave an explanation concerning their name: "The killing joke is like when people watch something like Monty Python on the television and laugh, when really they're laughing at themselves. It's like a soldier in the first world war. He's in the trench, he knows his life is gone and that within the next ten minutes he's gonna be dead ... and then suddenly he realises that some cunt back in Westminster's got him sussed - 'What am I doing this for? I don't want to kill anyone, I'm just being controlled'." The band played their debut gig on 4 August 1979 at Brockworth, Whitcombe Lodge supporting the Ruts and The Selecter.