18

Eighteen or 18 may refer to:

• 18 (number)
• One of the years 18 BC, AD 18, /wiki/1918, /wiki/2018

Film, television and entertainment

• 18 (film), a 1993 Taiwanese film
• Eighteen (film), a 2005 Canadian film
• 18 (British Board of Film Classification), a film rating in the United Kingdom
• 18 (Dragon Ball), a character in the Dragon Ball series
• "Eighteen", a 2006 episode of the animated television series 12 oz. Mouse

Science

• Argon, a gas found in the periodic table
• 18 Melpomene, an asteroid in the asteroid belt

Music

Albums

• 18 (Moby album), 2002
• 18 (Nana Kitade album), 2005
• 18..., 2009 debut album by G.E.M.
• 18 (Jeff Beck and Johnny Depp album), 2022

Songs

• "18" (5 Seconds of Summer song), from their 2014 debut album
• "18" (One Direction song), from their 2014 album Four
• "18", by Anarbor from their 2013 album Burnout
• "I'm Eighteen", by Alice Cooper, 1970
• "Eighteen" (CLC song), 2015
• "Eighteen" (Pale Waves song), 2018
• "Eighteen", by Connie Francis, 1957
• "Eighteen", by ¡Forward, Russia!, 2006
• "Eighteen", by Patricia Cahill, 1971