Gadfly

• The Gadfly, an 1897 novel by Ethel Lilian Voynich
• The Gadfly (play), an 1898 play by George Bernard Shaw
• The Gadfly (1928 film), a Soviet film by Kote Marjanishvili
• The Gadfly (1955 film), a Soviet film by Aleksandr Fajntsimmer
• The Gadfly Suite, a musical suite by Dmitri Shostakovich for the 1955 film
• The Gadfly (1980 film), a Soviet film by Nikolai Mashchenko
• The Gadfly (opera), a 1958 Russian opera by Antonio Spadavecchia
• Gadfly Online, an online and print magazine
• The Gadfly (Adelaide), a 1906–1909 Australian literary magazine produced by C. J. Dennis
• The Gadfly (album), a 2003 album by LPG
• The Gadfly, a fictional play in the novels of Geoffrey Trease, see The Hills of Varna

• Gadfly (database), a relational database management system
• Gadfly (mythology), the insect as sent by Hera to torment Io in Greek mythology
• Gadfly, the NATO reporting name for a Russian 9K37 Buk surface-to-air missile system
• Education Gadfly, the weekly e-bulletin of the Thomas B. Fordham Institute
• Autism's Gadfly, a blog maintained by Jonathan Mitchell (writer)

• HMS Gadfly, a list of ships of the Royal Navy

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