FN

FN may refer to:

• fn key, a key found on some compact keyboards
• FN Herstal or Fabrique Nationale de Herstal, a Belgian arms factory
  • FN (motorcycle), the motorcycles produced by FN Herstal
• Front National (France), a French political party
• Front National (French Resistance), a World War II French Resistance group
• Front National (Belgium), a Belgian political party
• Regional Air Lines' IATA airline designator
• Faking News, Indian news satire website
• Fibronectin, a glycoprotein involved in cell adhesion and growth