KN

KN or kn may refer to:

Companies

 * Kia (2021 logo often misread as KN), a South Korean multinational automobile manufacturer
 * Kieler Nachrichten, the only German-language newspaper published in Kiel, Germany
 * Kuehne + Nagel, a global transport and logistics company
 * K&N Engineering, manufacturer of car parts and consumables

Language

 * Kannada (ISO 639-1 code), a Dravidian language
 * $⟨kn⟩$, the Latin-script digraph used in English to write the word-initial sound

Science

 * Complete graph ($Kn$), a simple undirected graph in which every pair of distinct vertices is connected by a unique edge
 * Kilonewton (kN), a common expression of forces measured in newtons (N)
 * Knot (unit), a unit of speed equal to one nautical mile per hour
 * Knudsen number (Kn), a dimensionless number

Other uses

 * .kn, the Internet country code top-level domain for Saint Kitts and Nevis
 * Croatian kuna (kn), the currency of Croatia from 30 May 1994 until 31 December 2022
 * Saint Kitts and Nevis (ISO 3166 code), an island country and microstate
 * Kitchen Nightmares, an American reality television series
 * Ramsay's Kitchen Nightmares, the original British version of the show
 * Various other international editions: see Ramsay's Kitchen Nightmares & International versions