FRN may refer to:
- Bryant Army Heliport, Alaska, US, IATA code
- Fearn railway station, Scotland, station code
- Federal Reserve Note, a United States banknote
- Feminist Radio Network, a United States radio distribution network
- Feronia Inc., a DR Congo palm oil corporation, TSX stock market code
- First Nation Airways, Nigeria, ICAO code
- Floating rate note, bonds that have a variable coupon
- Food Recovery Network, a US student movement
- FoodRoutes Network, a US sustainable agriculture group
- National Reconstruction Front (French: Front pour la Reconstruction Nationale), a political party in Haiti
- National Renaissance Front (Romanian: Frontul Renașterii Naționale), a defunct political party in Romania
- National Revolutionary Front (French: Front révolutionnaire national), a political party in Vichy France
- FCC Registration Number, and entity identifier for the FCC Universal Licensing System (ULS)
- Federal Republic of Nigeria