HNS

HNS may refer to:
 * hns, ISO 639-3 code for the Caribbean Hindustani language
 * Hrvatski nogometni savez (Croatian Football Federation)
 * Hrvatski narodni savez (Croatian National Alliance) (1998-2004), a former political party in the Vojvodina region of Serbia
 * Hrvatska narodna stranka-Liberalni Demokrati (Croatian People's Party-Liberal Democrats), a political party in Croatia
 * "Hack 'n' slay", alternate term for the Hack and slash video gaming genre
 * Hacktivist News Service, a French alternative news service
 * HNS, IATA and FAA LID code for Haines Airport in Alaska, United States
 * Haruka na Sora, a Japanese video novel, sequel to Yosuga no Sora
 * Hexanitrostilbene, an explosive
 * HNS Convention, an international agreement on hazardous substances in the sea
 * Sikorsky HNS-1, US Navy designation of the Sikorsky R-4 helicopter
 * Hughes Network Systems, a subsidiary of Hughes Communications
 * Huizhou Nanshan School, a private primary and secondary school in Guangdong, China
 * Hyperosmolar nonketotic state, an alternate name for Hyperosmolar hyperglycemic state