FIAF

FIAF may refer to:
 * Fasting-Induced Adipose Factor or ANGPTL4, a protein
 * Fédération Internationale des Archives du Film or International Federation of Film Archives, a Paris-based association of film archivists
 * Finnish Air Force
 * Fleet Intelligence Adaptive Force, a U.S. military intelligence unit reporting to Navy Cyber Forces
 * French Institute Alliance Française, a New York-based organization for the promotion of Francophone culture
 * La Federación Interamericana de Filatelia, a philatelic organisation for North and South America