Aliens in the plural may refer to

• more than one of several types of aliens, such as extraterrestrial beings or those foreign to a place
• The Aliens was the name of Roky Erickson's backing band
• Aliens is a 1986 film starring Sigourney Weaver and the sequel to Alien

• Aliens From Space is a 1973 novel by Donald Keyhoe
• Aliens of the Deep is a 2005 documentary film directed by James Cameron