Killing Joke is an English post-punk band formed in October 1978 in Notting Hill, London, England; other sources report the band formed in early 1979. Founding members Jaz Coleman (vocals, keyboards) and Geordie Walker (guitars) have been the only constant members.

A key influence on industrial rock, their early music was described by critics Stephen Thomas Erlewine and John Dougan as "quasi-metal ... dancing to a tune of doom and gloom", which gradually evolved over the years, incorporating elements of electronic music, synthpop, gothic rock, and alternative rock, though always emphasising Coleman's "savagely strident vocals".