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, Andrew Gordon Dotzour-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)