OF or Of or of may refer to:

Arts and media OF TV, a French television channel OnlyFans, an internet content subscription service Odd Future, an American hip-hop collective Operation Flashpoint, a video game series

Language of, an English preposition Old French, a medieval language

Organizations Air Finland, a defunct Finnish airline (IATA airline code OF) , or the Civic Forum, a Czech political movement established during the Velvet Revolution in 1989 , the Liberation Front of the Slovene Nation, the main anti-fascist Slovene civil resistance and political organization active during World War II

Places Of, Turkey, a town and district in Trabzon Province Offenbach (district) and Offenbach am Main (German vehicle registration plates codes OF)

Post-nominals Officer of the Order of Fiji, which has the post-nominal letters of OF Old Fettesian, sometimes used as post-nominal letters to identify alumni of the British public school Fettes College, Edinburgh, Scotland

Science and technology Open Firmware, computer software which loads an operating system Oxygen monofluoride, a compound containing only the chemical elements oxygen and fluorine

Other uses Ordinary Form, in Roman Catholicism Outfielder, a defensive position in baseball Old Firm, a collective nickname for the Scottish football clubs Celtic and Rangers

See also Oxygen-free (disambiguation)