JF could refer to:
- Jean-François, a common French first name
- Jerry Falwell, a controversial American Evangelic pastor
- John Frusciante, a former guitarist of the Red Hot Chili Peppers
- Jon Foreman, a lead singer and guitarist of Switchfoot
- JF Duck, an aircraft
- Jetairfly IATA airline designator
- Juan Fernández, mostly in reference to Juan Fernández Islands
- Junk food
- L.A.B. Flying Service IATA airline designator
- Mazda JF engine, a piston engine
- Just Frame, a term from the game Soul Calibur, referring to certain moves which must be entered within a specific frame window (i.e. with specific timing)
- Jardine Fleming
- The JetFlash line of flash drives from Transcend
- Japan Foundation