KN

KN, kN, Kn or kn may refer to:

• Complete graph of size $n$, denoted $K_n$
• Croatian kuna, the official currency of Croatia (currency sign Kn or kn)
• North 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
• Kuehne + 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
• The letter combination ⟨kn⟩ in spelling