LFN may refer to:

  • La Familia Network, a Spanish-language, family-oriented television network
  • La Femme Nikita (TV series)
  • Last Friday Night (T.G.I.F.), a 2011 single by Katy Perry
  • Lingua Franca Nova, an auxiliary constructed language by C. George Boeree
  • Long fat network, a description of certain data network connections
  • Long filename, a FAT filename system introduced in Windows NT 3.5 and Windows 95