Noisia (/ˈnɔɪziə/) was a Dutch electronic music trio from Groningen. The trio was composed of Nik Roos, Martijn van Sonderen, and Thijs de Vlieger. Their music spanned several genres, including drum and bass, dubstep, breakbeat, and house. They released music on labels such as Skrillex's Owsla, deadmau5's mau5trap, and Jay-Z's Roc Nation. Noisia collaborated with Foreign Beggars on the supergroup project I Am Legion, releasing a self-titled album on 2 September 2013. They also worked under the pseudonym Nightwatch, contributing to projects with artists like Alexis Jordan, Hadouken!, Wiley, and Wretch 32. Their production work on Hadouken!'s album, For the Masses, resulted in a number 19 placement on the UK Albums Chart.

Noisia also created music for video games; including the soundtrack for DmC: Devil May Cry, a Counter-Strike: Global Offensive Music Kit in 2014, and the original soundtrack for the game, Armajet.

Van Sonderen, with his experience in hip hop production and piano skill, formed Noisia with Roos and de Vlieger. Their song "Tomahawk" (with Mayhem) gained attention from Shadow Law Recordings, leading to their debut release "Silicon" / "Tomahawk" on Paul Reset's Nerve Recordings in August 2003. Between 2005 and 2009, they released tracks like Drifter (incorporating liquid funk) and an EP under the name Hustle Athletics on Love Break Recordings. They later returned to using the name Noisia to maintain consistency and avoid genre pigeonholing.

In early 2007, Noisia produced Tasha Baxter's album Colour of Me for EMI South Africa. The album, completed over a year, blended pop, reggae, and drum and bass influences. In June 2008, they released FabricLive.40, a mix CD featuring many of their own tracks. They also remixed The Prodigy's "Omen" in 2009. Mid-2009 saw them producing Hadouken!'s second album, For the Masses, released in 2010. The album reached number 19 on the UK Albums Chart.

Noisia's debut studio album, Split the Atom, was released on 5 April 2010, preceded by the singles "Machine Gun" (8 March 2010) and "Split the Atom" (25 July 2010). A special edition, featuring 2012 remixes, was released on mau5trap on 27 February 2012. Later in 2012, they remixed Mark Knight's "Nothing Matters" and The Prodigy's "Smack My Bitch Up" for the re-release of The Fat of the Land.

Noisia also contributed music to short films and video games, including Midnight Club 3: Dub Edition, Wipeout Pulse, Wipeout HD, Wipeout HD Fury, Dance Dance Revolution Universe 2 (with "The Tide"), Gran Turismo PSP (with "Stigma"), DJ Hero (with "Groundhog"), and MotorStorm: Pacific Rift (remixed "Groundhog"). They collaborated with Klaus Badelt on remixes for the MotorStorm: Apocalypse soundtrack. The 16bit remix of "Machine Gun" featured in the Far Cry 3 trailer, and "Could This Be" and "Machine Gun" were used in SSX. They produced over three hours of music for Ninja Theory's DmC: Devil May Cry, resulting in a 36-track soundtrack released through Division on 15 January 2013.

Noisia manages two record labels: Vision Recordings (for drum and bass) and Division Recordings (for other genres like house and grime). Invisible Recordings, launched in March 2010, focused on experimental drum and bass and closed in 2019.

I Am Legion was a supergroup formed by Noisia and Foreign Beggars. Their self-titled debut album was released on 2 September 2013, following the singles "Make Those Move" and "Choosing for You".