HN

HN or Hn may refer to:

Arts and entertainment

 * French horn (musical score notation: Hn.)
 * HN, a numbering system for Royal Doulton Figurines, e.g. HN211
 * Headline News, former name of the HLN TV network
 * Hacker News, a social news website

Businesses and organizations

 * Equair (former IATA code: HN), a former Ecuadorian airline
 * HeavyLift Cargo Airlines (former IATA code: HN), a former Australian cargo airline
 * Hutchinson and Northern Railway (reporting mark: HN), Kansas, US

Places

 * Heilbronn (vehicle registration), a city in Germany
 * Herceg Novi (car plates: HN), a town in Montenegro
 * Honduras (ISO 3166-1 country code)
 * Hunan, a province of China
 * Thesprotia (vehicle plate code: ΗΝ), regional unit of Greece

Science and technology

 * .hn, the Internet country code top-level domain (ccTLD) for Honduras
 * Harmonic number, in mathematics

Other uses

 * Hospitalman, a US Navy hospital corpsman rate
 * $⟨hn⟩$, a two-letter combination used in some languages
 * Reduction of /hn/ to /n/ in Old/Middle English