Legion may refer to:

Military

* Roman legion, the basic military unit of the ancient Roman army * Spanish Legion, an elite military unit within the Spanish Army * Legion of the United States, a reorganization of the United States Army from 1792 to 1796 * French Foreign Legion, a part of the French Army, created for foreign nationals willing to serve in the French Armed Forces * International Legion of Territorial Defense of Ukraine, a Ukrainian foreign volunteer wing of the 2022 Russo-Ukrainian war * Various List of military legions, military legions, often composed of soldiers from a specific ethnic, national, religious or ideological background * HMS Legion (1914), HMS ''Legion'' (1914), a Royal Navy World War I destroyer * HMS Legion (G74), HMS ''Legion'' (G74), a Royal Navy World War II destroyer sunk in 1942

Veterans' organizations

* American Legion, an organization of American veterans * The Royal British Legion, a UK charity providing support for members of the British Armed Forces and their dependents * Royal Canadian Legion, a non-profit Canadian veterans' organization * South African Legion of Military Veterans, the oldest veterans organization organisation in South Africa * Society of the Cavaliers of the Order of Lāčplēsis & Freedom Fighters, also known as the Legion, a right-wing veterans' organisation founded by Voldemārs Ozols (1884–1949)

Arts and media

Comics

* Legion (Marvel Comics), a Marvel Comics antihero * Legion (DC Comics), a DC Comics supervillain * Legion of Super-Heroes, a DC Comics superhero team * The Legion (comics), one of the comic books where the Legion of Super-Heroes was published * Legion, a group of characters from the ''Spawn (comics), Spawn'' series * Legion (IDW Publishing), ''Legion'' (IDW Publishing), a comic book based on the 2010 film of the same name * Legion, a member of the Special Executive * ''L.E.G.I.O.N.'', a 1989 DC Comics title and a team of superheroes, the 20th Century forerunners to the Legion of Superheroes * ''Ghostbusters: Legion'', a 2004 comic book series

Film and television

* Legion (Law & Order: Criminal Intent), "Legion" (''Law & Order: Criminal Intent''), the eighteenth episode in the second season of ''Law & Order: Criminal Intent'' * Legion (Red Dwarf), "Legion" (''Red Dwarf''), the second episode of ''Red Dwarf'' Series VI * Legion (1998 film), ''Legion'' (1998 film) a 1998 made-for-television film * Legion (2010 film), ''Legion'' (2010 film) a 2010 apocalyptic supernatural action film * The Legion (film), ''The Legion'' (film) a 2020 film starring Mickey Rourke * Legion (TV series), ''Legion'' (TV series), an FX TV series based on the Marvel Comics character * "Legion", an Smallville (season 8), eighth-season episode of the television series ''Smallville'' * Legion, the alien kaiju seen in the film ''Gamera 2: Attack of Legion'' * Legion, a fictional computer network in the 2019 film ''Terminator: Dark Fate''

Games

* Legion, a often appearing enemy in the Castlevania series. * ''Legion Gold'', or simply Legion, a strategy game * Legions (Magic: The Gathering), a set of cards in the game ''Magic: The Gathering'' * Legion (Mass Effect), the adopted name of a synthetic intelligence in ''Mass Effect 2'' * Legion, central villain of the video game ''Shadow Man (video game), Shadow Man'' * Legion, an artificial intelligence unit in ''Command & Conquer 3: Kane's Wrath'' * ''World of Warcraft: Legion'', the sixth ''World of Warcraft'' expansion set *The Legion, a group of killer characters in the horror video game ''Dead by Daylight'' *''Watch Dogs: Legion'', an action-adventure game and the third installment in the ''Watch Dogs'' series

Plays

* ''Legion'', a play by Hal Corley

In print

* Legion (novella series), ''Legion'' (novella series), a series of novellas by Brandon Sanderson * ''Legion'', a unit in the army of the fictional The Domination * Legion (Blatty novel), ''Legion'' (Blatty novel), a 1983 novel by William Peter Blatty * Legion (demon), a group of demons referred to in the Christian Bible * ''Legion'', by Dan Abnett, book 7 in the Legion (Warhammer 40,000), ''Horus Heresy'' book series * The Legion (novel), ''The Legion'' (novel), a 2010 historical novel by Simon Scarrow

Music

* Legion Records, started in 1997 by Michael Brosnan under the name Goatboy Records * Legion (band) a deathcore band from Columbus, Ohio * Legion, stage name of Erik Hagstedt, Swedish vocalist in the black metal band Marduk (band), Marduk * The Legion, a hip hop group from the Bronx, New York, associated with Black Sheep (group), Black Sheep * Legion (album), ''Legion'' (album), a 1992 album by Deicide * ''Legion'', a 1985 album by Mark Shreeve * ''Legions'', a 2013 album by the Danish band Artillery (band), Artillery * "Legion", a song from the album ''No Sacrifice, No Victory'' by HammerFall * "Legion", a song from the album ''Big Sounds of the Drags'' by Junkie XL * "Legion", a song by Saviour Machine from the album ''Saviour Machine I'' * "Legion", a song from the album ''Empires (VNV Nation album), Empires'' by VNV Nation * "Legion", a song by Slaughter Lord, covered by At the Gates in the 2002 re-issue of the album ''Slaughter of the Soul''

Sports

* Legion Field, a stadium in Birmingham, Alabama * Legion Sports Complex, a complex in Wilmington, North Carolina ** Legion Stadium, the main stadium in the Legion Sports Complex * Racine Legion, an American football team from 1922 to 1925

Other uses

* Legion (demons), the collective name of the demons in the gospel account of the Gerasene demoniac * Legion Park (disambiguation) * Legion (taxonomy), a taxonomic rank in biology * Legion (software), a computer software system * Legion Interactive, an Australian telecommunications company {{disambiguation