The name Jack-Knife has been used by two bands.

1.) It was a 1979 one-off recording project of John Wetton (lead vocals, bass, keyboards), Richard Palmer-James (guitars), John Hutcheson (Hammond organ, piano, backing vocals), and Curt Cress (drums and percussion). Palmer-James had previously written lyrics for the band King Crimson, of which Wetton had been a member. They released a single album entitled I Wish You Would in 1979 and then disbanded.

2.) As of 2012, there was an upload to Last.fm of two songs by a new band named Jack-Knife. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.