FXX is an American television channel owned and operated by The Walt Disney Company.
FXX may also refer to:
- FXX (Canada), Canadian TV channel
- Ferrari FXX, 2000s Ferrari race car
- Ferrari FXX-K, 2010s Ferrari hypercar
- Felix Airways (ICAO airline designator)
- Fokker F.XX, a Dutch airliner
- F/A-XX program (aka F-XX), a 21st-century U.S. Navy project to replace the F/A-18E/F