Fates Warning is an American progressive metal band, formed in Hartford, Connecticut, in 1982 by vocalist John Arch, guitarists Jim Matheos and Victor Arduini, bassist Joe DiBiase, and drummer Steve Zimmerman. There have been numerous lineup changes over the course of their 42-year career, and Matheos is the only constant member. As of 2020, the band consists of Matheos, vocalist Ray Alder (who replaced Arch in 1987), bassist Joey Vera (who replaced DiBiase in 1996), drummer Bobby Jarzombek and guitarist Michael Abdow. Fates Warning also had a revolving cast of drummers and guitarists by the time Jarzombek and Abdow joined the band in 2007 and 2020 respectively.

A pioneer of the progressive metal movement, Fates Warning has been referred to as one of the "Big Three" of the genre, creating and popularizing the style along with Queensrÿche and Dream Theater. Their early work, influenced by the new wave of British heavy metal, is also important in the development of American power metal. Fates Warning has released thirteen studio albums, two live albums, one compilation album, one VHS cassette, three DVDs (each featuring live concerts) and four demo tapes. The band experienced its first commercial success with the 1986 release of their third studio album, Awaken the Guardian, which peaked at No. 191 on the Billboard 200 and became the first album released on Metal Blade to enter that chart. Their next three albums — No Exit (1988), Perfect Symmetry (1989) and Parallels (1991) — were also successful; the first two peaked at No. 111 and No. 141 on the Billboard 200, respectively. By 2001, Fates Warning had sold over a million albums worldwide. Their latest studio album, Long Day Good Night, was released on November 6, 2020.