KN may stand for:

  • Complete graph of size, denoted
  • Croatian kuna, the official currency of Croatia (currency sign Kn or kn)
  • Democratic People's Republic of Korea (NATO country code KN)
  • Kannada language (ISO 639-1 language code kn)
  • Khuddaka Nikaya, the fifth nikaya (collection) of the Sutta Pitaka division of the Buddhist Pali Canon
  • Kid Nation, a show on CBS
  • Kieler Nachrichten, a newspaper printed in Kiel, Germany
  • Kilonewton (kN), an SI unit of force
  • Klein-Nishina formula, a formula for prediction of the angular distribution of x-rays and gamma rays incident upon a single electron
  • Knot (unit) (kn), nautical miles per hour
  • Knudsen number (Kn), in physics
  • Kühne + Nagel, a logistics company
  • Saint Kitts and Nevis (ISO 3166-1 alpha-2 country code KN)
    • .kn, the country code top level domain (ccTLD) for Saint Kitts and Nevis
  • Kilingi-Nõmme, Estonia
  • Kohtla-Nõmme, Estonia
  • Karksi-Nuia, Estonia