Jack
Jack may refer to:

Places
Jack, Alabama, US, an unincorporated community
Jack, Missouri, US, an unincorporated community
Jack County, Texas, a county in Texas, USA

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
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 (1996 film), a film starring Robin Williams
Jack (2004 film), a film starring Anton Yelchin and Stockard Channing
Jack (2013 film), a television film starring Rick Roberts and Sook-Yin Lee
Jack (2014 film), a German film
Jack (2015 film), an Austrian 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

Literature
Jack (Homes novel), a 1990 novel by A. M. Homes
Jack (Lundell novel), a 1976 novel by Ulf Lundell
Jack (Robinson novel), a 2020 novel by Marilynne Robinson

Periodicals
Jack (Italian magazine), an Italian-language technology 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 an American pop-rap duo
Jack (Vietnamese singer) (born 1997), a Vietnamese pop star

Albums
Jack (album), a 2010 studio album by John Farnham
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), a 2013 song by Breach
"Jack" (1980), a B-side song to "Tell The Children" by Sham 69 on the album Kings & Queens
"Jack" (1984), a song and single by Bone Orchard
"Jack" (2001), a song by Iced Earth from their 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 (2009) album
"The Jack", a song by AC/DC originally on the album T.N.T. (1975)

Television
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, 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
All pages with titles beginning with Jack 
All pages with titles containing Jack
Hijacking (disambiguation)
Jacking, a dance technique and music form that first became popular in the late 1980s
Jacks (disambiguation)