There are at least nine bands and one DJ with this name.

One is an emo violence band from Annandale, Virginia formed in 2008. Associated bands include The Pessimist Hangs The Optimist and The Usual www.kilgoretroutva.bandcamp.com. One of the guitarists left Kilgore Trout, who now play on as a three-piece under the name Ostraca.

Another is an alternative rock band that was based in Nottingham and Sheffield in the north of England between 1985 and 1991. In that time Kilgore Trout released two EPs, contributed eight tracks to two compilation LPs, and appeared on a flexidisc that came free with the legendary fanzine Ablaze!
This band's mainstay was Chris Trout, a seminal figure in the British alternative music scene, who has also worked with Bear, A.C. Temple, Spoonfed Hybrid, Lazerboy, Coping Saw and Smokers Die Younger.

Trout wrote the songs and played most of the instruments in Kilgore Trout. He also recorded over 50 four-track demos for the band that were never released at the time. There are free downloads of some of these unreleased tracks to be found here: http://misterchristrout.com

The third is a Canadian indie band from the late 1990s and early 2000s.

The fourth is a DJ with impeccable folk and hiphop infused mixes,released on Solid Steel Presents.

5. An electric jazz band from Seattle, Washington

6. A punk band from JErsey City, New JErsey

7. A jam-funk act from Silverthorne, Colorado

8. A garage rock group from Midland City, Ohio

9. An ambient act from Cranston, Rhode Island

10. A goth-punk band from Bochum, GErmany Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.