RFO

RFO may refer to:


 * Radio Filharmonisch Orkest, a Dutch radio orchestra
 * Range Forest Officer, a forestry officer in India
 * Réseau France Outre-mer, now Réseau Outre-Mer 1ère, a network of French radio and television stations
 * Read For Ownership, in computer cache coherency protocols
 * Request for offer
 * Residual fuel oil, a heavy product from oil refineries
 * Restrictive flow orifice, a tool to limit the danger of uncontrolled flow
 * RF Online, a multiplayer online role-playing computer game
 * Royal Flight of Oman
 * Russian Fascist Organization, a Russian émigré group active in Manchuria before World War II