FFI may refer to:
Entertainment Festival Film Indonesia, Indonesia Final Fantasy (video game), or Final Fantasy I, 1987 Final Fight (video game), 1989
Language , a typographical ligature Foia Foia language, spoken in Papua New Guinea
Organizations Family Firm Institute Fauna and Flora International, a conservation group Fellow of the Flag Institute Film Federation of India Finlay Forest Industries, a defunct Canadian forest products company Franciscan Friars of the Immaculate, a Roman Catholic institute of religious life Frederikshavn fI, a Danish sport club Free File, Inc., an American consortium of tax preparation companies French Forces of the Interior (French: ), French resistance fighters during World War II Fuel Freedom International, an American multi-level marketing company Norwegian Defence Research Establishment (Norwegian: ), a Norwegian military R&D institute
Science and technology Fatal insomnia, a fatal neurological disorder Foreign function interface, in computing
Other A fee for intervention charged in the United Kingdom by the Health and Safety Executive Free Fees Initiative, Ireland, government funding of undergraduate fees in some circumstances