In music

• Key (music), the scale of a piece of music
• Key (instrument), finger-operated mechanism in musical instruments
• Keys, colloquial term for keyboard instruments

United States

• Key, Alabama
• Key, Ohio
• Key, West Virginia
• Keys, Oklahoma
• Florida Keys, an archipelago of about 1,700 islands in the southeast United States

Elsewhere

• 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 in Southland, New Zealand

Films

• The Key (1934 film), a 1934 film directed by Michael Curtiz
• The Key (1958 film), a war film directed by Carol Reed, starring William Holden and Sophia Loren
• The Key, also known as Odd Obsession, a 1959 Japanese film directed by Kon Ichikawa
• The Key (1961 film), a Soviet animated feature
• The Key (1965 film), a Yugoslav omnibus film
• The Key (1971 film), a Czechoslovakian drama
• The Key (1983 film), an Italian erotic film directed by Tinto Brass, starring Stefania Sandrelli
• Kelid (The Key), a 1987 Iranian film written by Abbas Kiarostami
• The Key (2007 film), a French thriller film directed by Guillaume Nicloux
• Key (film), a 2011 film
• The Key (2014 film), an American film directed by Jefery Levy

Literature

• The Key (Curley novel), a 2005 novel by Marianne Curley
• The Key (Elfgren and Strandberg novel), a 2013 novel by Mats Strandberg and Sara Bergmark Elfgren
• The Key (Tanizaki novel), a 1956 novel by Jun'ichirō Tanizaki
• "The Key" (short story), a 1966 short story by Isaac Asimov
• The Key, a 1969 book of etymology by John Philip Cohane
• The Key, a magazine published by Kappa Kappa Gamma
• The Key, a music publication of WXPN in Philadelphia
• "The Key", a short story by Satyajit Ray

Music

Television

• "The Key" (Code Lyoko episode), 2005
• "The Key" (Fear the Walking Dead), 2020
• "The Key" (Prison Break), 2006
• "The Key" (The Walking Dead), 2018
• "The Key" (Yes, Prime Minister), 1986
• "The Keys" (Seinfeld), a 1992 TV episode

Other uses in arts, entertainment and media

• Key (character), a supervillain in the DC Comics universe
• Kirby's Epic Yarn (KEY), a 2010 game by Nintendo
• Key, the title character of Key the Metal Idol, a Japanese anime OVA series
• The Key, a painting by Jackson Pollock