A basilisk is a legendary reptile reputed to be king of serpents.

Basilisk may also refer to:

• Common basilisk, a lizard found in Central and South American rainforests
• Any lizard of the genus Basiliscus
• Prangos ferulacea (Common basilisk), a Mediterranean plant

• Basilisk (The Legendary Pink Dots album), 1982
• Basilisk (D'erlanger album), 1990

• Basilisk (comics), the name of four Marvel Comics characters
• Basilisk, a fictional terrorist group seen in the DC Comics Suicide Squad
• Basilisk (Harry Potter)
• Basilisk (manga), a manga and anime series
• A motif in the works of author David Langford
• A star system in the David Weber novel On Basilisk Station
• Roko's basilisk, a thought experiment originating on the LessWrong blog

• Basilisk (cannon)
• HMAS Basilisk, a naval base
• HMS Basilisk, the name of several Royal Navy ships

• Basilisk (web browser), a fork of Firefox that maintains support for XUL/XPCOM extensions and retains the user interface of the Firefox 29-56 era
• Basilisk, Queensland, a locality in the Cassowary Coast Region, Queensland, Australia
• Basilisk II, a software emulator

• Basiliscus, Roman emperor (475–476)
• All pages with titles containing Basilisk