Sex is the trait that determines whether a sexually reproducing organism produces male or female gametes.

Sex, SEX or sexual may also refer to:

• Sexual intercourse, a sexual activity

• Sex (1920 film), an American silent drama
• Sex (2024 film), a Norwegian drama
• Sex (TV series), an Australian series
• "Sex", a 1997 TV episode of Brass Eye
• "Sex", an episode of Kath & Kim, 2002
• Sex: The Annabel Chong Story, a 1999 documentary film

• Sex (book), by Madonna and Steven Meisel, 1992
• Sex (manga), a Japanese manga series by Atsushi Kamijo
• Sex (play), by Mae West, 1926
• Sexes, an MDPI academic journal

• SEX, pseudonym of American rapper Young Thug

• Sex (Elli Kokkinou album), 2005
• Sex (Telex album), 1981
• Sex (The Necks album), 1989
• Sex (The 1975 EP), 2012
• Sex (Tila Tequila EP), 2007
• Sex (Vintage album), 2009

• "Sex" (The 1975 song), 2012
• "Sex" (Cheat Codes and Kris Kross Amsterdam song), 2016
• "S.E.X." (Lyfe Jennings song), 2006
• "Sex" (Lenny Kravitz song), 2014
• "Sex" (Mötley Crüe song), 2012
• "Sex (I'm a ...)", by Berlin, 1983
• "Sex", by Colette Carr, 2011
• "Sex", by Eden from I Think You Think Too Much of Me, 2016
• "SEX", by Frank Zappa from The Man from Utopia, 1983
• "S.E.X.", a bonus track by Madonna on Rebel Heart, 2015
• "S.E.X.", by Nickelback from Dark Horse, 2008
• "Sex", by Oomph! from Sperm, 1994
• "Sex", by Rammstein from the untitled Rammstein album, 2019
• Sex, a segment of R.O.S.E. by Jessie J, 2018
• "Sexual" (song), by Neiked featuring Dyo, 2016
• "Sexual", by Die Toten Hosen from Love, Peace & Money, 1994
• "Sexual (Li Da Di)", by Amber from Amber, 1999
• "Sexual", by Nick Jonas from Spaceman, 2021

• Sex (boutique), in London
• SEX (computing), an assembly language mnemonic
• Seax, or sex, a knife used by ancient Germanic peoples
• -sex, an Old English suffix meaning Saxons, and used in place names such as Essex, Middlesex, and Wessex.
• Sex, abbreviation of Sextans, a constellation
• Sodium ethyl xanthate, a chemical compound
• Sex-, the Latin prefix meaning 6
• Sex Peak, a mountain in Montana, United States
• Sexing, the act of discerning the sex of an animal

• All pages with titles containing sex
• All pages with titles containing sexes
• All pages with titles containing S.E.X.
• All pages with titles beginning with sex
• S3X (disambiguation)
• Cex
• Gender