Key, Keys, The Key or The Keys may refer to:

• Key (cryptography), a piece of information needed to encode or decode a message
• Key (instrument), a component of a musical instrument
• Key (lock), a device used to operate a lock
• Key (map), a guide to a map's symbology
• Key (music), the scale of a piece of music
• Key in a keyboard layout
  • Typewriter
  • Computer keyboard
  • Virtual keyboard

• The Key (1934 film), an American pre-Code film
• Key Largo (1948 film), starring Humphrey Bogart and Lauren Bacall
• The Key (1958 film), starring William Holden and Sophia Loren
• The Key, also known as Odd Obsession, a 1959 Japanese comedy drama
• The Key (1961 film), a Soviet animated feature
• The Key (1965 film), a Croatian omnibus film
• The Key (1971 film), a Czechoslovak drama
• The Key (1983 film), an Italian erotic film
• The Key (1987 film), an Iranian film
• The Key (2007 film), a French thriller film
• Key (film), a 2011 Telugu-language psychological thriller
• The Key (2014 film), an American erotic drama film

• The Key (Curley novel), by Marianne Curley, 2005
• The Key (Elfgren and Strandberg novel), by Mats Strandberg and Sara Bergmark Elfgren, 2013
• The Key (Tanizaki novel), by Jun'ichirō Tanizaki, 1956
• "The Key" (short story), by Isaac Asimov, 1966
• The Key, a 1974 children's book by Sheila K. McCullagh, part of the Tim and the Hidden People series
• The Key: A Startling Enquiry into the Riddle of Man's Past, a 1969 book by John Philip Cohane
• The Key, a magazine published by Kappa Kappa Gamma
• "The Key", a short story by Satyajit Ray
• The Keys (journal), of the League of Coloured Peoples founded in 1933

• The Keys (English band), 1979–1983
• The Keys, a Welsh band successor to Murry the Hump

• Key (Meredith Monk album), 1971
• Key (Son, Ambulance album), 2004
• The Key (Joan Armatrading album), 1983
• The Key (Vince Gill album), 1998
• The Key (Nocturnus album), 1990
• The Key (Operation: Mindcrime album), 2015
• Keys (album), by Alicia Keys, 2021
• The Keys (EP), by GWSN, 2020

• "The Key" (Speech Debelle song), 2009
• "The Key" (Matt Goss song), 1995
• "The Key", a song by Ou Est Le Swimming Pool from the 2010 album The Golden Year
• "Key", a song by Band-Maid from the 2014 album Maid in Japan
• "The Key", a 2010 song by Edita Abdieski
• "Key", a song by C418 from the 2011 album Minecraft – Volume Alpha
• "The Keys", a song by Crazy Town from the 2015 album The Brimstone Sluggers
• "Key", a song by Porter Robinson from the 2017 EP Virtual Self

• "The Key" (Code Lyoko), a 2005 episode
• "The Key" (Danger Man), a 1960 episode
• "The Key" (Fear the Walking Dead), a 2020 episode
• "The Key" (Prison Break), a 2006 episode
• "The Key" (The Walking Dead), a 2018 episode
• "The Key", an episode of Yes, Prime Minister, 1986
• "The Keys" (12 Monkeys), a 2015 episode
• "The Keys" (Seinfeld), a 1992 episode

• Key (character), a supervillain in the DC Comics universe
• Key, the title character of Key the Metal Idol, a Japanese original video animation series
• The Key, a painting by Jackson Pollock

• Key (surname), including a list of people with the surname
• Keys (surname), including a list of people with the surname
• Key (entertainer) (born 1991), South Korean entertainer
• Key Lawrence (born 2001), American football player

• Cay, or key, a small island on the surface of a coral reef
  • Key Cay, British Virgin Islands

• Key, Alabama
• Key, Ohio
• Keys, Oklahoma
• Florida Keys

• The Keys, Newfoundland and Labrador, Canada
• Rural Municipality of Keys No. 303, Saskatchewan, Canada
• Key, Iran, a village in Isfahan Province, Iran
• Key Island, Tasmania, Australia
• The Key, New Zealand, a locality of Mararoa, New Zealand

• Candidate key, or simply a key, in relational database management systems
  • Unique key
• A key in an associative array
• Key (engineering), a machine element used to connect a rotating machine element to a shaft
• KeY, a tool is used in formal verification of Java programs
• The Key (smartcard), a British smartcard for public transport ticketing
• .key, file extension used by Keynote presentation software
• Identification key, used to identify biological entities
• Telegraph key, or Morse key, a specialized electrical switch

• Key (basketball), a marked area on a basketball court
• Frederick Keys, an American baseball team

• Key (company), a Japanese visual novel studio
• Key Airlines, an American former airline
• Key School, in Annapolis, Maryland, U.S.
• Keys, a truce term used in western Scotland
• Key light, the primary light in a lighting setup
• Amazon Key, a service by Amazon Prime
• House of Keys, the lower branch of the parliament of the Isle of Man
• Samara (fruit), or key, a type of fruit
• Yeoman Warders Club in the Tower of London, or "The Keys"
• KeyBank, an American regional bank based in Cleveland, Ohio
• Cay, a small island, sometimes spelled "Key"

• All pages with titles beginning with Key
• All pages with titles containing Key
• Keay, a surname
• Keays, a surname
• Keyes (disambiguation)
• Keying (disambiguation)
• Qi (disambiguation)
• Quay (disambiguation)
• Keyboard instrument