JF may refer to:
Brands: JF Duck, an aircraft Mazda JF engine, a piston engine JetFlash, a line of flash drives made by Transcend
Businesses and organizations: Japan Foundation Jardine Fleming, Hong Kong-based investment bank Javnaðarflokkurin, the Social Democratic Party of the Faroe Islands TUI fly Belgium, a Belgian airline formerly known as Jetairfly Jet Asia Airways, a Thai airline (IATA code JF) L.A.B. Flying Service, an American airline (1956-2008, IATA code JF)
Cities Juiz de Fora, a municipality of Minas Gerais, Brazil which goes by this nickname