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

Organizations

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

  • HCA Healthcare, an operator of health care facilities
  • 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
  • Hydaburg Cooperative Association, federally recognized Alaska Native tribe

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
  • Hans Christian Andersen, Danish author
  • 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