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{{wiktionary|Jack|jack}}
'''Jack''' may refer to:
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==Places==
* [[Jack, Alabama]], US, an unincorporated community
* [[Jack, Missouri]], US, an unincorporated community 
* [[Jack County, Texas]], a county in Texas

==People and fictional characters==
* [[Jack (given name)]], a male given name, including a list of people and fictional characters with the name
* [[Jack (surname)]], including a list of people with the surname
* [[Jack (Tekken)]], multiple fictional characters in the fighting game series ''Tekken''
* [[Jack the Ripper]], an unidentified British serial killer active in 1888
* [[Wolfman Jack]] (1938–1995), a stage name of American disk jockey Robert Weston Smith
* [[New Jack]], a stage name of Jerome Young (1963–2021), an American professional wrestler
* [[Spring-heeled Jack]], a creature in Victorian-era English folklore
* [[Jack (hero)]], an archetypal Cornish and English hero and stock character

==Animals and plants==

===Fish===
{{Redirect|Jackfish|the ghost town|Jackfish, Ontario}}
*[[Carangidae]] generally, including:
**[[Almaco jack]]
**[[Amberjack]]
**[[Bar jack]]
**[[Black jack (fish)]]
**[[Crevalle jack]]
**[[Giant trevally]] or ronin jack
**[[Jack mackerel]]
**[[Leather jack]]
**[[Yellow jack]]
*[[Coho salmon]], males called "jacks"
*''[[Esox]]'' (northern pike), young called "jacks"
*"Jackfish" or "jack", a western Canadian name for [[northern pike]]

===Mammals===
* [[Jack (baboon)]], a baboon who was the assistant to a disabled railway signalman in South Africa
* [[Jack (cat)]], a Norwegian forest cat who was lost by American Airlines baggage handlers
* Jack or jackass, a male [[donkey]] (''Equus africanus'')

=== Plants ===
* [[Jack (tree)]] (''Mangifera caesia''), a relative of the mango
* [[Jack pine]] (''Pinus banksiana''), a North American conifer
* [[Jackfruit]] (''Artocarpus heterophyllus'')

==Arts, entertainment, and media==
===Films===
* [[Jack (1925 film)|''Jack'' (1925 film)]], a French silent film directed by Robert Saidreau
* [[Jack (1996 film)|''Jack'' (1996 film)]], a film starring Robin Williams
* [[Jack (2004 film)|''Jack'' (2004 film)]], a film starring Anton Yelchin and Stockard Channing
* [[Jack (2013 film)|''Jack'' (2013 film)]], a television film starring Rick Roberts and Sook-Yin Lee
* [[Jack (2014 film)|''Jack'' (2014 film)]], a German film
* [[Jack (2015 film)|''Jack'' (2015 film)]], an Austrian film
* [[Jack (2025 film)|''Jack'' (2025 film)]], an Indian film

===Games ===
* [[Jack (playing card)]], the lowest-ranking face card in some types of deck
* Jack, a target ball used in games such as [[bowls]]
* Jack, a playing piece used in the children's game called [[Jacks (game)|jacks]]

===Literature===
* [[Jack (Daudet novel)|''Jack'' (Daudet novel)]], an 1876 novel by Alphonse Daudet
* [[Jack (Lundell novel)|''Jack'' (Lundell novel)]], a 1976 novel by Ulf Lundell
* [[Jack (Homes novel)|''Jack'' (Homes novel)]], a 1990 novel by A. M. Homes
* [[Jack (Robinson novel)|''Jack'' (Robinson novel)]], a 2020 novel by Marilynne Robinson

===Periodicals===
* [[Jack (Italian magazine)|''Jack'' (Italian magazine)]], an Italian-language technology magazine
* [[Jack (magazine)|''Jack'' (magazine)]], an English-language British lad mag

===Music===
====Artists and groups====
* [[Jack (band)]], a British independent pop group signed to the Too Pure label
* [[Jack & Jack]], an American pop-rap duo
* [[Jack (Vietnamese singer)]] (born 1997), a Vietnamese pop star

====Albums====
* [[Jack (album)|''Jack'' (album)]], a 2010 studio album by John Farnham
* [[Jack (EP)|''Jack'' (EP)]], a 1991 EP by Moose
* ''Jack'', a 1984 album by [[Bone Orchard]]
* ''[[J.A.C.K.]]'', a 2013 studio album by Forever the Sickest Kids

====Songs====
* [[Jack (song)|"Jack" (song)]], a 2013 song by Breach
* "Jack" (1980), a B-side song to "Tell The Children" by Sham 69 on the album [[Kings & Queens (Sham 69 album)|''Kings & Queens'']]
* "Jack" (1984), a song and single by [[Bone Orchard]]
* "Jack" (2001), a song by Iced Earth from their album [[Horror Show (album)|''Horror Show'']] (2001)
* "Jack" (1983), a song and single by [[Machinations (band)]]
* "Jack" (1983), a song and single by [[Mighty Gabby]]
* "Jack", song by Pixie Lott from the ''[[Turn It Up (Pixie Lott album)|Turn It Up]]'' (2009) album
* "Jack" (2023), a song by Hardy from ''[[The Mockingbird & the Crow]]''
* "The Jack", a song by AC/DC originally on the album ''[[T.N.T. (album)|T.N.T.]]'' (1975)

===Television===
* [[Jack (TV series)|''Jack'' (TV series)]], a 3D-animated series broadcast by TVOntario
* [[Jack TV]], a general entertainment channel in the Philippines (cable)

===Other uses in arts, entertainment, and media===
* [[Jack FM]], a radio format and brand

==Military==
* [[Jack (flag)]], a national maritime flag flown by warships, e.g.,
**[[Union Jack]]
* Jack, the Allied code-name of the Japanese [[Mitsubishi J2M]] fighter of World War II

==Technology==
===Computing and software===
* [[Jack (CAD software)]], a 3-D ergonomics and human factors CAD package
* [[Jack (human modeling)]], a human modeling and simulation system
* [[JACK Audio Connection Kit]], a computer sound server
* [[JACK Intelligent Agents]], a multi-agent platform written in Java

===Electrical interfaces===
* [[Electrical connector#Plug and socket connectors|Electrical connector]], or "wall jack", a socket (often panel-mounted) intended to accept a plug
* [[Phone connector (audio)]], commonly known as "audio jack", or "jack plug", or "phone jack"
* [[Registered jack]], a standardized telecommunication network interface for connecting voice and data equipment 

===Mechanical tools===
* [[Jack (device)]], a device used to lift heavy objects
**[[Jackscrew]], a device used to support heavy objects at various heights
**[[Pallet jack]], a device with two forks used to lift and move pallets; the powered version is known as a [[forklift]]
**[[Strand jack]], used in construction and engineering, and is capable of lifting hundreds of tonnes
* [[Boot jack]], a device for removing boots
* [[Jack plane]], a tool for smoothing wood
* [[Roasting jack]], a device for turning a spit

==Other uses==
* [[Jack Box]], the mascot of Jack in the Box restaurants
* [[Cracker Jack]] and Cracker Jack'D, snack foods with the fictional Sailor Jack as a mascot
* [[Jack Daniel's]], a Tennessee whiskey distillery, whose product is sometimes referred to as "Jack"
* [[Jack of plate]] or jack, a type of armor
* [[Jack's (store)]], a defunct British discount supermarket chain owned by Tesco
* [[Monterey Jack]], a variety of cheese
* [[Quarter-jack]] or jack, an animated figure which strikes the bell of a clock
* [[Yukon Jack (liqueur)]], a Canadian whisky with honey
* [[Jack Tar]] or "jack", a term for a sailor

==See also==
* {{lookfrom}}
* {{in title}}
* [[Hijacking (disambiguation)]]
* [[Jacking]], a dance technique and music form that first became popular in the late 1980s
* [[Jacks (disambiguation)]]

{{disambiguation|geo|plant|fish}}