JN or Jn may refer to:

• Excel Airways (IATA airline designator)
• Livingston Compagnia Aerea (IATA airline designator), an Italian airline
• Jan Mayen (FIPS PUB 10-4 territory code), an island in the Arctic Ocean
• Gospel of John, in Christian scripture
• Johnson–Nyquist noise, electrical noise generated by random thermal motion in a conductor
• Jornal de Notícias, a Portuguese newspaper
• Jornal Nacional, a Brazilian news program broadcast by Rede Globo
• Jornal Nacional, former title of the Portuguese news program Jornal da 8 that is broadcast by TVI
• al-Nusra Front, a Syrian militant group in the Syrian Civil War

• Decorations and medals of the Netherlands
• Decorations, and medals of the Netherlands
• Decorations of Azad Hind
• Decoration truck
• Decorative Arts
• Decorative Bead
• Decorative bead
• Decorative box
• Decorative concrete
• Decorative knotwork in East Asia
• Decorative molding
• Decorative moulding
• Decorative ornament
• Decorative throw
• Decorator crab
• Decorator Pattern
• De Cordova Bend Dam
• DeCordova Museum and Sculpture Park
• DeCordova, Texas
• De Cordova, Texas
• DeCordova, TX
• De Cordova, TX
• Decori Birmingham
• Decorin
• Decoritidae