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 , the Latin-script digraph used in English to write the word-initial sound
Science Complete graph (), 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 KN number, used by the United States for describing North Korean missiles Saint Kitts and Nevis (ISO 3166 code), an island country and microstate Kelly's Navy, referring to John Kelly Limited fleet, and book under the same name 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