Queensrÿche () is an American progressive metal band. It formed in 1982 in Bellevue, Washington, out of the local band the Mob. The band has released sixteen studio albums, one EP, and several DVDs, and continues to tour and record. The original lineup consisted of guitarists Michael Wilton and Chris DeGarmo, drummer Scott Rockenfield, bassist Eddie Jackson, and lead vocalist Geoff Tate.

Queensrÿche has sold over twenty million albums worldwide, including over six million albums in the United States. They are considered one of the leaders of the progressive metal scene of the mid-to-late 1980s, and often referred to as one of the "Big Three" of the genre, along with Dream Theater and Fates Warning. The band received worldwide acclaim after the release of their 1988 album Operation: Mindcrime, which is often considered one of the greatest heavy metal concept albums of all time. Their next album, Empire (1990), was also very successful and included the hit single "Silent Lucidity". The band has received three Grammy Award nominations for songs from both albums. In 1998, drummer Rockenfield received an individual Grammy nomination.

Also in 1998, DeGarmo left the band for personal reasons, returning briefly to write and record their eighth studio album Tribe (2003). Over the years, his replacements have been Kelly Gray, Mike Stone, and Parker Lundgren.

Following a highly publicized backstage altercation before a show in São Paulo, Brazil, in April 2012, Tate was fired from the band and replaced with then-Crimson Glory singer Todd La Torre. In response to his dismissal, Tate and his wife Susan (who served as the band's manager from 2005 to 2012) filed a lawsuit in a Washington court, claiming that he was wrongfully terminated. The ruling in the preliminary injunction was that both parties were allowed to use the name Queensrÿche until a court ruling or a settlement decided who would get to use the name. A settlement was reached on April 17, 2014, in which founding members Wilton, Rockenfield and Jackson were awarded the rights to the band trademark, continuing to perform with the lineup that additionally includes lead vocalist La Torre and guitarist Lundgren.

During the time both parties could use the name Queensrÿche, Tate created his own lineup featuring former rhythm guitarist Gray and musicians from bands including Blue Öyster Cult, Ozzy Osbourne, Whitesnake, Dio, AC/DC and Quiet Riot. This version of Queensrÿche with Geoff Tate released the album Frequency Unknown on April 23, 2013, while Queensrÿche (with La Torre replacing Tate) released their eponymous album on June 24 and 25, 2013 (European and American release date, respectively). Both bands toured in 2013 and 2014, after which Tate changed the name of his version of Queensrÿche to Operation: Mindcrime. The La Torre-fronted Queensrÿche has since recorded three more albums with him: Condition Hüman (2015), The Verdict (2019) and their newest release Digital Noise Alliance (2022).