Oz has several meanings:

• The Wonderful Wizard of Oz is a children's story written by L. Frank Baum, and The Wizard of Oz is the title of various works derived from it.
• The Land of Oz is the fictional empire in the Oz books.
• "Oz" (from "Oz-tralia") is also a colloquial term for Australia.
• Oz (from "Oz-wald") is also the title of a TV show on HBO set in the fictional American Oswald prison.
• Oz is the name of a multi-paradigm computer programming language.
• OZ is an abbreviation often used for the OpenZaurus Linux distribution
• Oz is the name of a satirical and irreverent magazine publishing in Britain in the late 1960s.
• oz. is an abbreviation for 'ounce' (from Italian 'onza').
• Frank Oz (Richard Frank Oznowicz) is a film director, actor and puppeteer noted for his work on the Muppets and Yoda.
• Amos Oz is an Israeli author.
• Daniel 'Oz' Osborne is a fictional character in the television series Buffy the Vampire Slayer.
• the IATA code for Asiana
• Oz is a commune in the Isère département in France.
• Oz is the title of a major 1987 Judge Dredd storyline in the UK comic 2000 AD
• OZ (acronym for Organization of Zodiac) is a fictional organization in the 1995 anime Gundam Wing.