Eternity is a term in philosophy referring to the idea of forever or to timelessness.

Eternity may also refer to:

• Eternity (Marvel Comics), a fictional cosmic entity in Marvel Comics
• Eternity Comics, an imprint of Malibu Comics
• Kid Eternity, a superhero in Quality Comics and DC Comics

• Eternity (novel), a 1988 novel by Greg Bear
• Eternity, an organization in the 1955 Isaac Asimov novel The End of Eternity
• The Eternity Cure, a 2013 young adult novel by Julie Kagawa

• Eternity (magazine), a defunct American Christian magazine
• Eternity (newspaper), an Australian Christian newspaper founded in 2009
• Eternity SF, a 1970s American science fiction magazine

• Eternity (1943 film), a controversial 1943 film made in Japanese-occupied China
• Eternity (1990 film), a film starring Jon Voight
• Eternity (2010 Thai film), a Thai film
• Eternity (2010 South African film), a South African film
• Eternity (2013 film), a New Zealand film directed by Alex Galvin
• Eternity: The Movie (2014 film), an American film
• Eternity (2016 film), a French film
• Eternity (2018 film), a Peruvian film
• "Eternity" (Angel), a 2000 episode of the television show Angel
• Eternity, a 1993 TVB drama, starring Faye Wong

• Eternity∞, a side-project by Jade Valerie and Roberto "Geo" Rosan, also an album by the group
• Eternity (group), a South Korean virtual band

• Eternity (Alice Coltrane album), 1975
• Eternity (Amplifier EP), 2008
• Eternity (Anathema album), and the three-part title song
• Eternity (April EP), 2017
• Eternity (DJ Heavygrinder), 2008 album
• Eternity (Every Little Thing album), 2000
• Eternity (Freedom Call album), 2002
• Eternity (Kamelot album), and the title song
• Eternity (Kangta album), and the title song
• Eternity (Michael Learns to Rock album), and the title song
• Eternity (Tina Guo album), 2013
• Eternity: Best of 93 – 98, by Takara
• Sempiternal (album), the fourth studio album by British rock band Bring Me the Horizon

• "Eternity" (Alibi song), a 2000 single by Alibi (Armin van Buuren and DJ Tiësto)
• ""Eternity"/"The Road to Mandalay", a 2001 single by Robbie Williams
• "Eternity" (Ian Gillan single), a 2006 song from the video game Blue Dragoon
• "Eternity" (VIXX song), a 2014 single recorded by South Korean idol group VIXX
• "Eternity", a 1969 single by Vikki Carr
• "Eternity", by capsule from the album Flash Back
• "Eternity", by Dark Moor from the album Dark Moor
• "Eternity", by Dreams Come True from the soundtrack for the film The Swan Princess
• "Eternity", by Jolin Tsai from the album Don't Stop
• "Eternity", by Jonas Brothers from the album Flesh Gordon
• "Eternity", by Paul van Dyk featuring Adam Young from the album Evolution
• "Eternity", by Sheena Easton from the album No Sound But a Heart
• "Eternity", by Stratovarius from the album Episode
• "Eternity", by Your Memorial from the album Redirect

• Eternity (graffito), a word chalked by Arthur Stace around Sydney, Australia, from the 1940s to the 1960s
• Eternity (fragrance), a Calvin Klein fragrance
• Eternity puzzle, a puzzle game
• Project Eternity, a fantasy role-playing video game
• Eternity Range
• Eternity clause, a clause intended to ensure that the law or constitution cannot be changed by amendment

• Eternal (disambiguation)
• Eternalism (disambiguation)
• Walang Hanggan (disambiguation)
• Forever (disambiguation)
• Timeless (disambiguation)
• All pages with titles beginning with Eternity
• All pages with titles containing Eternity