HSS may refer to:
Organizations Croatian Chess Federation (Croatian: Hrvatski šahovski savez, HŠS) Croatian Peasant Party (Croatian: Hrvatska seljačka stranka) Hampstead Scientific Society, UK Helsingfors Segelsällskap, a Finnish yacht club Hindu Swayamsevak Sangh, a cultural organisation in several countries History of Science Society Humanist Society Scotland Hungarian Skeptic Society HSS Hire, a British equipment and tool hire business Hospital for Special Surgery, New York City
Schools Henderson Secondary School, Singapore Humbergrove Secondary School, Toronto, Ontario, Canada High Storrs School, Sheffield, England
Technology High-speed steel, a subset of tool steels Home Subscriber Server, a mobile subscriber database, part of the IMS framework Hollow structural section, a type of metal profile
Other uses Humanities and Social Sciences (HSS) HSS Journal (Musculoskeletal Journal of Hospital for Special Surgery), a medical journal ERA HSS, a racing car Harsusi language (ISO 639-3 code), spoken in Oman Health systems strengthening, to improve the health care system of a country High-speed Sea Service, a former class of ferry Hisar Airport (IATA code), India HSS hypothesis, another name for the green world hypothesis High School Story, a game by Pixelberry
See also Holy Spirit School (disambiguation)