HSS

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