People:

• Kaos of Iberia, an ancient king of Causasian Iberia
• Kaos, professional wrestler Joey Munoz
• Kaos, the name by which Thai film director Wych Kaosayananda is credited in the film Ballistic: Ecks vs. Sever
• KAOS, a social club based out of the University of Canterbury in Christchurch, New Zealand

Fiction:

• KAOS (Get Smart), a fictional criminal spy agency in the television series Get Smart
• KAOS, the cyborgnetic leader of the Kremling Krew in Donkey Kong Country 3: Dixie Kong's Double Trouble!
• KAOS ("Killing as organised sport"), an alternative name for Assassins (game)
• Kaos (film), a 1984 Italian film directed by Paolo and Vittorio Taviani
• The Ancient One (Kaos), a character from the anime Ronin Warriors
• Kaos, aka Ronnie Soak, the fictional Fifth Horseman of the Apocalypse in the Discworld novel Thief of Time

Music:

• KAOS (FM), a radio station (89.3 FM) licensed to Olympia, Washington, United States
• Radio KAOS (Slovenia), a cable/Internet radio station
• Radio K.A.O.S., a 1987 concept album by Roger Waters
• Kaos (album), an album by Bo Kaspers Orkester
• Kaos (Anita Tijoux album), an album by Anita Tijoux
• KAOS, a 1958 novelty 45 RPM record by Stanley Ralph Ross and Bob Arbogast
• Radio Kaos, a Mexican Rock band formed in Los Angeles in 1994
• KAOS (band), a late 1970s Los Angeles punk band

Computing:

• Kent Applicative Operating System, a functional operating system concept
• KAOS (software development), a goal-oriented software requirements capturing approach in requirements engineering
• K Alternative Operating System, a collection of different applications based on the ZEAiW kernel
• Kaos (arcade game), a 1981 arcade game by GamePlan
• Kaos Studios, a video game developer

Magic:

• KAOS (magic trick), a magic trick by Sean Beard where a card is pulled through a window