HSA

HSA may refer to:
* Haiku Society of America
* The Harlem School of the Arts
* Harvard Student Agencies, world's largest student-run corporation
* Hawker Siddelely Aviation
* Health savings account
* The HSA Coalition, a non-profit organization
* Health Sciences Authority, a statutory board of the Ministry of Health of Singapore
* Heat stable antigen, a cluster of differentiation, also known as CD24
* High School Assessments a Maryland Public School standardized test.
* Hispanic Student Association
* Home School Association, a common name for independent parent groups not associated with a formal Parent-Teacher Association
* Homeland Security Act
* Horizon Science Academy, a Columbus, OH based school.
* Hoffman Sports Association, an organizing body for Freestyle BMX events worldwide
* High Speed Alliance, see HSL-Zuid
* Hmar Students Association
* Human Security Act
* Human serum albumin
* Humane Slaughter Act
* Hunt Saboteurs Association
* A mutual health plan provider in the UK, originally the Hospital Saving Association

ee also

*The Book of Hosea has a common abbreviation of Hsa.
*East African Safari Air has a ICAO Code of HSA
*Stennis International Airport in Bay St. Louis, Mississippi has an FFA airport code of HSA (the ICAO code is KHSA)
* Hasimara railway station has a code of HSA
*Homeland Security Advisory System
* High Speed Amphibian vehicles from Gibbs, the maker of the Gibbs Aquada, Humdinga and Quadski
*Harmony Science Academy school system in Texas and Louisiana

HSA Humble Sevents of Art. Toronto Based Graffiti CrewHealth Sciences Authority, Singapore