Röyksopp (Norwegian pronunciation: [ˈrœ̂ʏksɔp]) are a Norwegian electronic music duo from Tromsø formed in 1998. The duo consists of childhood friends Svein Berge and Torbjørn Brundtland who formed Röyksopp during the Bergen Wave. After experimenting with different genres of electronic music, the band solidified their place in the electronica scene with their 2001 debut album, Melody A.M., released on the Wall of Sound record label.

Röyksopp has consistently experimented with various genres pertaining to electronic music. Stylistically, the band makes use of various genres, including ambient, house music and synth-pop. The band is also known for its elaborate concert performances, which often feature eccentric outfits.

Since their 1998 debut, the duo has gained critical acclaim and popular success around the world. To date, Röyksopp has been nominated for two Grammy Awards, won seven Spellemannprisen awards, performed worldwide tours, and produced albums that have topped the charts in several countries, including four consecutive number-one albums in their native country.

Røyksopp literally means "smoke mushroom". It is the Norwegian word for the class of mushrooms known as puffball. The band's name replaces the second letter (ø) with ö, which is non-existent in the Norwegian alphabet but corresponds to the same sound in the Swedish alphabet.

Berge and Brundtland were introduced to each other through a mutual friend in Tromsø, Norway, when Berge was 12 years old and Brundtland was 13. They enjoyed the same films and music, and shared an interest in electronics. The two began playing music together due to a shared interest in electronica, experimented with various forms of electronic music. They bought a drum machine together part of the Tromsø techno scene of the early 1990s. Their childhood in Tromsø and the natural scenery of Northern Norway have often been mentioned as some of their most important inspirations. The pair separated before obtaining any popular success with their music, but reunited with each other in 1998 in Bergen, Norway.

Bergen, a city of 212,944 people in 1990, had overtaken Tromsø's position as the most vital scene for underground electronic music in Norway, and Röyksopp worked with other Norwegian musicians like Frost, Those Norwegians, Drum Island, and Kings of Convenience's guitarist and singer Erlend Øye in what was called the Bergen Wave. During this time, the duo befriended Geir Jenssen. Under the tutelage of Jenssen, the duo started a band called Aedena Cycle with Gaute Barlindhaug and Kolbjørn Lyslo. In 1994 Aedena Cycle recorded a vinyl EP called Traveler's Dreams. The EP was released under the R&S Records sublabel Apollo. Following the release of the EP, Jenssen almost convinced the band to sign a full record deal with Apollo Records.

After recording as part of Aedena Cycle, Berge and Brundtland left the group to form their own band, Röyksopp. The word röyksopp is a stylized version of the Norwegian word for the puffball mushroom, "røyksopp". The band has stated that the word could also evoke the mushroom cloud resulting from an atomic blast.

Röyksopp's debut single was released by local Bergen Wave-era independent label Tellé. Röyksopp's first single "So Easy", which was later re-released on their first album, was the second record released by Tellé. After being used in a UK T-Mobile advertisement, "So Easy" became popular in the UK market and was later re-released, combined with their later single "Remind Me".