"Citizen Erased" is a song by English alternative rock band Muse from their second studio album Origin of Symmetry. The track is 7 minutes and 21 seconds long, making it the second longest single track in Muse's discography behind "The Globalist", the eleventh track from the band's seventh studio album Drones, and fourth longest piece. The song has a synthesized ending that leads straight into the next track on the album, "Micro Cuts". The song has long been a fan favourite, and in July 2007, a Muse fan site, Muselive.com, launched a campaign to get it into the singles charts through various download sources. The track managed to get to number one on the British download company 7digital's charts, but failed to make it into the UK Singles Chart. It did, however, chart at number 122. On 9 December 2010 in Sydney, Australia, Bellamy temporarily changed "Citizen Erased" to "Citizen Arrested" as a response to the Australian founder of , Julian Assange's, arrest in Sweden regarding alleged sexual offences.

Matthew Bellamy has described the song thus: "It's an expression of what it feels like to be questioned. I spend more time than most people being asked about purpose, and it's a strange feeling. I don't really have the answers and I have to respond on the knowledge I have obtained so far, but the problem is that it gets printed, and something else has come along that's made you completely disagree with what you said".

The guitar parts were recorded with a six-string guitar with the sixth string tuned down to A (AADGBE). Live, the guitar part is played on a seven-string, with the tuning, low to high, AADDGBE, the A strings an octave apart and the D strings at the same pitch.

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