Alien primarily refers to:
Alien(s), or The Alien(s) may also refer to:
Music
Songs
- "Alien" (Britney Spears song), 2013
- "Alien" (Jonas Blue and Sabrina Carpenter song), 2018
- "Alien", a song by Atlanta Rhythm from the album Quinella, 1981
- "Alien", a song by Bush from the album Sixteen Stone, 1994
- "Alien", a song by Dead Letter Circus from the EP Dead Letter Circus, 2007
- "Alien", a song by The Devil Wears Prada from the EP Space, 2014
- "Alien", a song by Erasure from the album Loveboat, 2000
- "Alien", a song by Japan from the album Quiet Life, 1979
- "Alien", a song by Lamb from the album Fear of Fours, 1999
- "Alien", a song by Nerina Pallot from the album Dear Frustrated Superstar, 2001
- "Alien", a song by P-Model from the album Landsale, 1980
- "Alien", a song by Pennywise from the album Straight Ahead, 1999
- "Alien", a song by Stray Kids from the album SKZ-Replay, 2022
- "Alien", a song by Structures from the album Life Through a Window, 2014
- "Alien", a song by the National from the album First Two Pages of Frankenstein, 2023
- "Alien", a song by Third Day from the album Conspiracy No. 5, 1997
- "Alien", a song by Thriving Ivory from the album Thriving Ivory, 2003
- "Alien", a song by Tokio Hotel from the album Humanoid, 2009
- "Alien", a 2018 song by Beach House
- "Alien", a 2020 song by Lee Su-hyun
- "Alien", a 2020 song by Dennis Lloyd
- "Aliens" (song), a 2017 song by Coldplay
- "Aliens", a 1984 song by Warlord
- "The Alien", a song by Dream Theater from the album A View from the Top of the World, 2021