X (disambiguation)

X is the 24th letter of the English alphabet.

X may also refer to:

Fictional entities

 * X (Dark Horse Comics), a character and series
 * X (Mega Man), the main protagonist of the Mega Man X video game series
 * X (The X-Files), a television series character
 * Radio X, the fictional radio station broadcasting the Grand Theft Auto: San Andreas soundtrack
 * X, a symbol used on treasure maps in fiction to show the location of the hidden treasure
 * X Parasite, a central subject of the 2002 game Metroid Fusion

Film

 * X (1963 film), subtitled The Man with the X-Ray Eyes, an American science-fiction film
 * X (1986 film), a Norwegian film directed by Oddvar Einarson
 * X (1996 film), an anime film directed by Rintaro, based on the X manga by CLAMP
 * X (2022 film), an American-Canadian horror film by Ti West
 * X the Unknown, a 1956 British film
 * X, alternate title for Malcolm X (1992 film), by Spike Lee
 * X: Night of Vengeance, a 2011 film by Australian director Jon Hewitt
 * X: Past Is Present, a 2015 Indian anthology film
 * X rating, a designation for adult-only films

Television

 * Kamen Rider X, a Japanese series in the Kamen Rider franchise
 * Ultraman X, a 2015 Japanese tokusatsu television series
 * The X (TV series), a Canadian children's program
 * WXSP-CD, a Grand Rapids, Michigan TV station branded as "The X"
 * X (TV series), a Japanese anime series based on the X manga by CLAMP
 * X, the production code for the 1966 Doctor Who serial The Ark

Video games

 * X (1992 video game) a 3D game for the Nintendo Game Boy console
 * X (game series), a science fiction space simulator series by Egosoft
 * X (Xbox show), an annual trade show hosted by Microsoft

Literature

 * X (Cage book), by avant garde composer John Cage
 * X (magazine), a quarterly review of literature and the arts
 * X (manga), a 1992 Japanese manga by CLAMP
 * X (Grafton novel), 2015, by Sue Grafton
 * X (young adult novel), 2015, by Ilyasah Shabazz and Kekla Magoon
 * X: A Fabulous Child's Story, a 1972 short story and 1978 picture book by Lois Gould
 * X: Or, Betty Shabazz v. The Nation, a 2017 play by Marcus Gardley
 * 'X' Stands for Unknown, a 1984 collection of science essays by Isaac Asimov

Bands

 * X (American band), a punk band
 * X (Australian band), a punk band
 * X Japan, Japanese metal band, originally named X from 1982–1992

Albums

 * X (Agnez Mo album), 2017
 * X (Klaus Schulze album), 1978
 * X (Gnags album), 1983
 * X (INXS album), 1990
 * X (K-Ci & JoJo album), 2000
 * X (Def Leppard album), 2002
 * X (Anna Vissi album), 2002
 * X (Kristeen Young album), 2004
 * X the album, a Christian compilation album series starting in 2004
 * X (Liberty X album), 2005
 * X (Intocable album), 2005
 * X (Fourplay album), 2006
 * X (Kylie Minogue album), 2007
 * X (Trace Adkins album), 2008
 * X (Spock's Beard album), 2010
 * X (Royal Hunt album), 2010
 * X (Roll Deep album), 2012
 * X (The 69 Eyes album), 2012
 * X (Chris Brown album), 2014
 * X (Ed Sheeran album) (read as "Multiply"), 2014
 * X (The Driver Era album), 2019
 * X (Ken Carson album), 2022
 * X (mixtape), by pH-1, 2020
 * X, a Philippine hip-hop album by Ex Battalion
 * X (Nonpoint album), 2018
 * X: The Godless Void and Other Stories, 2020, by ...And You Will Know Us by the Trail of Dead
 * Ten (Sault album), (also styled X) 2022

Operas

 * X, The Life and Times of Malcolm X, 1986

Songs

 * "X" (21 Savage and Metro Boomin song)
 * "X" (Chris Brown song)
 * "X" (Jonas Brothers and Karol G song)
 * "X" (Liberty X song)
 * "X" (Nicky Jam and J Balvin song)
 * "X" (Poppy song)
 * "X" (Xzibit song)
 * "X", a song from the album The Circle by B'z
 * "X", a song from the album Neysluvara by Hatari
 * "X", a song from the album Undeniable by Hellyeah
 * "X", a song from the album Pain Is Love by Ja Rule featuring Missy Elliott and Tweet
 * "X", a song from the album Future History by Jason Derulo
 * "X", a song from the album Luv Is Rage 2 by Lil Uzi Vert
 * "X", a song from the album The Magic Position by Patrick Wolf
 * "X", a song from the album Angels & Demons by Peter Andre
 * "X", a song from the album Black Panther by ScHoolboy Q, 2 Chainz, Saudi, and Kendrick Lamar
 * "X", a song from the album Toxicity by System of a Down
 * "X", a song from the album Blue Blood by X Japan
 * "X", a song from the album In the Court of the Dragon by Trivium
 * "X", a song from the album X by Ken Carson

Stations

 * KHTI, formerly KCXX, known as "The 'X' at 103.9 FM", a Southern California rock n' roll radio station
 * KXZZ (FM), formerly known as "The 'X' at 100.1 FM", a rock n' roll radio station in Reno, Nevada
 * WNFZ, formerly known as "94.3 the X", a modern rock radio station in Knoxville, Tennessee
 * WQXA-FM, also known as 105.7 "The 'X'", a modern rock radio station in Harrisburg, Pennsylvania
 * WXDX-FM, also known as "The 'X' at 105.9", a modern rock radio station in Pittsburgh, Pennsylvania
 * WXLV (FM), former call sign branded as "90.3 "The X"", a college radio station in Allentown, Pennsylvania
 * WXNY-FM, known as "La X 96.3", a Spanish radio station in New York City
 * WZDA, formerly known as "103.9 The 'X'", a modern rock radio station in Dayton, Ohio

Roller coasters

 * X2 (roller coaster), at Six Flags Magic Mountain, formerly known as X
 * X (roller coaster), in Thorpe Park, England

Companies

 * X Development, Google's in-house incubator established in 2010
 * X Corp., the parent company of X (social network)
 * X.com (bank), the predecessor to PayPal
 * X, the stock symbol for United States Steel Corporation

Other organizations

 * X (demo party), a Dutch demoscene party which started in 1995
 * Organization X, a resistance organization active during the Axis occupation of Greece and the Greek Civil War
 * The X, nickname for École Polytechnique, a French engineering school

Language script and phonetic

 * Typographical approximation of the Greek letter chi (Χ)
 * Kha (Cyrillic), a letter of the Cyrillic script
 * x, used in the International Phonetic Alphabet for the voiceless velar fricative
 * , used in the International Phonetic Alphabet for the voiceless uvular fricative

In arts and entertainment

 * Director X (born 1975), Canadian music video director, also known as X and Little X
 * Princess X (musician), former stage name of musician Liza Fox (active 2010–present)
 * XXXTentacion (1998–2018), American rapper commonly referred to as "X"
 * DMX (rapper) (1970–2021), American rapper commonly referred to as "X"
 * Shaun Ryder (born 1962), English musician also known as X
 * Terminator X (born 1966), stage name for American DJ Norman Roberts, who worked with Public Enemy
 * X, ring name of wrestler Carl Ouellet (born 1967)

Other people

 * X González (born 1999), American gun control activist
 * Clyde X (1931–2009), Nation of Islam official
 * Khoisan X (1955–2010), political activist
 * Laura X (born 1940), feminist historian
 * Malcolm X (1925–1965), civil rights activist
 * Michael X (1933–1975), activist and criminal
 * Xiuhtezcatl Martinez (born 2000), climate activist, often known as "X"
 * X, the girl in the X Case, a landmark court case about abortion in Ireland
 * X, pseudonymous author of the 1947 Foreign Affairs "X Article", formally titled "The Sources of Soviet Conduct"
 * X, surname often assumed by members of the Nation of Islam

Astronomy

 * X, signifying a comet of unknown orbit
 * Galaxy X (galaxy), a postulated dark galaxy
 * Planet X, a hypothesised planet in the outer solar system

Biology

 * × (or x), used in some types of hybrid names in botany
 * X chromosome, a sex determinant in many animal species, including mammals

Chemistry

 * X, the pseudoelement symbol for a halogen or halide in organic chemistry

Computing

 * OS X (pronounced 'OS ten'), the former name of the macOS operating system for Apple computers
 * X Window System, a client-server display protocol often used in UNIX environments
 * X file format, used by DirectX
 * X, the mnemonic for the execute instruction on the TI-990 and the TMS9900

Mathematics

 * X, Roman numeral for 10 (number)
 * x, an axis in the Cartesian coordinate system
 * x, a common variable for unknown or changing concepts in mathematics
 * Typographical approximation for:
 * Cross product (×)
 * Multiplication sign (× or ✕)

Physics

 * X (charge), a conserved quantum number in particle physics
 * X band, part of the microwave band of the electromagnetic spectrum
 * X unit (X), in physics

Other uses

 * Generation X, the Western sociological generation born after Boomers or Jonesers and before Millennials
 * iPhone X, a smartphone by Apple Inc.
 * HiPhi X, an electric crossover automobile produced from 2020
 * Tesla Model X, an electric crossover by Tesla
 * Zeekr X, a battery electric compact crossover SUV
 * X (French automobile), a French car produced in 1908 and 1909
 * X (fragrance), a fragrance set by Irish pop vocal band Westlife
 * X (gender identity), used on passports and identification documents to denote intersex or indeterminate gender
 * X (social network), American social networking service (formerly Twitter)
 * X mark, a common written symbol of negation or affirmation
 * X, the symbol for a strike in bowling
 * X, a handwritten symbol for a kiss
 * X, a street name for the drug MDMA
 * X, often used by straight edgers to show their commitment to their lifestyle
 * ╳, a box-drawing character
 * Ⓧ, a Japanese typographic symbol used in resale price maintenance
 * X, the legal signature of an illiterate person
 * The Xcel Energy Center ("The X"), an arena in Saint Paul, Minnesota, United States
 * Nilgiri Mountain Railway X class
 * JRW oka-X.svg, the official West Japan Railway Company service symbol for the San'yō Main Line