Mullet may refer to:

• Mullet, a kind of fish
• Mullet, a haircut that is short on top, and long at the back; it is also a derogatory slang term for a kind of person
• Mullet, a term used in heraldry
• Mullet, the title of a 2001 Australian film directed by David Caesar, starring Ben Mendelsohn
• Mullet, a town in Albania.
• The Mullet, the isthmus of the Mullet Peninsula in the barony of Erris, County Mayo in the west of Ireland.
• The Mullets (TV series), a UPN sitcom.
• Mullets (Comic Strip), a comic strip.
• The Mullets (band), a punk rock band from Kentucky.