HCA

HCA may refer to:

Courts

 * High Court of Australia, the supreme court in the Australian court hierarchy and the final court of appeal in Australia

Europe

 * Hall–Carpenter Archives, an archive of materials related to gay activism in Britain
 * Heidelberg Center for American Studies, an institute at Heidelberg University, Germany
 * Helsinki Citizens' Assembly, a nongovernmental organization dedicated to peace, democracy and human rights in Europe
 * Heritage Crafts Association, a UK charity that helps to preserve traditional hand crafts
 * Homes and Communities Agency, a UK non-departmental public body

United States

 * Heritage Christian Academy (disambiguation), several private Christian schools:
 * Heritage Christian Academy (Fort Collins, Colorado)
 * Heritage Christian Academy (Texas)
 * Heritage Christian Academy (Kansas)
 * Heritage Christian Academy (Minnesota)
 * Heritage Christian Academy (New Jersey)
 * Hollywood Critics Association, a film critic group in Los Angeles, California
 * Hopkins Consulting Agency, a student-run technology consulting company at The Johns Hopkins University
 * Hospital Corporation of America, an operator of health care facilities

Other organizations

 * Hillcrest Christian Academy, an independent primary school in South Africa
 * Holy Child Academy, a Catholic school in Pagadian City, Philippines

Science and technology

 * Heterocyclic amine, a type of chemical compound containing at least one heterocyclic ring
 * Hexachloroacetone, an organic compound also called hexachloropropanone or perchloroacetone
 * Hierarchical cluster analysis, a method of cluster analysis used in data mining
 * High content analysis, a laboratory microscopic technique
 * Host channel adapter, in electronic communications
 * Hydroxycitric acid
 * Holloway Cut Advisor, a method of rating brilliant cut diamonds
 * Hot Cranking Amps, a measurement of the current provided by a car battery
 * Hydrographic Commission on Antarctica

Other uses

 * HCA (classification), a para-cycling classification
 * Healthcare Assistant, a UK name for a job class of medical paraprofessionals
 * Hennepin Center for the Arts, a building in Minneapolis, Minnesota, US
 * Historical cost accounting