King Crimson je engleska grupa koju su osnovali gitarista Robert Fripp i bubnjar Michael Giles 1969. godine.

Muzički stil ove grupe je uglavnom karakteriziran kao progresivni rock, iako tu ima jakih elemenata jazza, klasične muzike, new wavea, heavy metala i folk muzike. King Crimson je imao vrlo veliki uticaj na razvoj heavy metala, a pogotovo progresivnog metala. Iako se tokom svih ovih godina sastav uveliko izmijenio, ova grupa i dan danas održava koncerte i snima albume.

Progressive rock, psychedelic rock, jazz fusion, experimental rock, hard rock, New Wave

Former membersPeter Sinfield — lyrics, synthesiser, keyboards, illumination, artwork (1968–1972)
Greg Lake — bass guitar, lead vocals (1968–1970)
Michael Giles — drums, percussion, backing vocals (1968–1969, guested in 1970)
Ian McDonald — flute, saxophones, clarinet, bass clarinet, mellotron, keyboards, vibraphone, backing vocals (1968–1969, guested in 1974)
Gordon Haskell — bass guitar, lead vocals (1970, guested in 1970)
Andy McCulloch — drums (1970)
Ian Wallace — drums, percussion, backing vocals (1971–1972; died 2007)
Boz Burrell — bass guitar, lead vocals, choreography (1971–1972; died 2006)
Bill Bruford — acoustic and electronic drums and percussion (1972–1974, 1981–1984, 1994–1997)
John Wetton — bass guitar, lead vocals, occasional piano, guitar and lyrics (1972–1974)
David Cross — violin, viola, mellotron, electric piano, keyboards, flute (1972–1974)
Jamie Muir — various percussion, drums, allsorts (1972–1973)
Adrian Belew — guitars, lead vocals, guitar synthesiser/MIDI guitar, electronic percussion, lyrics, occasional drums (1981–1984, 1994–2013)
Trey Gunn — Warr Guitar, Chapman Stick, baritone guitar, Ashbory silicone-string bass, backing vocals, "talker" (1994–2003)
Additional/guest musiciansKeith Tippett — acoustic and electric pianos on In the Wake of Poseidon, Lizard and Islands
Peter Giles — bass guitar on In the Wake of Poseidon
Mark Charig — cornet on Lizard, Islands and Red (from Keith Tippett Sextet and Centipede)
Robin Miller — oboe and cor anglais on Lizard, Islands and Red
Nick Evans — trombone on Lizard
Jon Anderson — guest lead vocals on Lizard (from Yes)
Rick Kemp — bass guitar, played for two weeks in band before vocalist Boz Burrell was taught to play the instrument
Harry Miller — double bass on Islands
Paulina Lucas — soprano vocals on Islands
Uncredited musicians — strings on Islands
Hunter MacDonald — synthesiser and engineering on Earthbound
Richard Palmer-James — lyrics on Larks' Tongues in Aspic, Starless and Bible Black and Red
Uncredited musician — cello on Red
Eddie Jobson — violin and electric piano studio overdubs on USA
Margaret Belew — source text for "Indiscipline" (on Discipline) and lyrics for "Two Hands" (on Beat). (Margaret Belew was an artist and was also Adrian Belew's wife during the time of King Crimson line-up 4).
David Singleton - post-production editing & recomposition/found sound on THRaKaTTak and The Power to Believe