FOF

FOF may refer to:


 * Fact or Faked: Paranormal Files, an American television series
 * Fear of falling
 * Fight or Flight (disambiguation)
 * Finding of fact
 * Finnish Orienteering Federation
 * Flow of funds
 * Focus on the Family
 * Forum of Firms, an accountancy trade organization
 * Forskning och Framsteg, a Swedish popular science magazine
 * Fred. Olsen Airtransport, a defunct Norwegian airline
 * Frets on Fire, a video game
 * Fund of funds
 * Identification friend or foe
 * FOF grade tea
 * FOF, the SMILES notation for oxygen difluoride