| Acronym | Definition |
|---|
| HCA | Hospital Corporation of America |
| HCA | Homes and Communities Agency (UK) |
| HCA | Hitachi Capital America |
| HCA | High Court of Australia |
| HCA | Hans Christian Andersen (author) |
| HCA | Hierarchical Cluster Analysis (statistics) |
| HCA | Hydroxycitric Acid |
| HCA | Health Care Assistant |
| HCA | Health Care Administration |
| HCA | Habitat Conservation Area (various locations) |
| HCA | Health Care Agency |
| HCA | High Content Analysis |
| HCA | Human Coronary Artery |
| HCA | Heidelberg Center for American Studies (University of Heidelberg; Germany) |
| HCA | Hubbard College of Administration |
| HCA | Home Care Associates (various locations) |
| HCA | Helvetica Chimica Acta (Wiley chemistry publication) |
| HCA | Host Channel Adapter |
| HCA | High Contrast Addressing |
| HCA | Hub Clamping Area |
| HCA | High Consequence Area (oil and gas pipeline industry) |
| HCA | Hollywood Casino Aurora (Illinois) |
| HCA | Health Care Analysis (journal) |
| HCA | Hybrid Cellular Automata (algorithms) |
| HCA | Head of Contracting Activity |
| HCA | Humanitarian and Civic Assistance |
| HCA | Holy Childhood Association (now Missionary Childhood Association) |
| HCA | Home Care Association of New York State |
| HCA | Helsinki Citizens' Assembly (Turkey; also seen as HYD) |
| HCA | Heterocyclic Amine |
| HCA | Hall-Carpenter Archives (est. 1982; UK) |
| HCA | Hagley Community Association (UK) |
| HCA | Hospital Center in Arlington (Arlington, VA) |
| HCA | Host Country Approval (various locations) |
| HCA | Hospital Caterers Association (UK) |
| HCA | Held by Civil Authorities (US Navy) |
| HCA | Host Channel Adaptor |
| HCA | Hot Cranking Amps (automobile battery rating) |
| HCA | House Cleaning Alliance (Denver, CO) |
| HCA | Hispanic Contractors Association |
| HCA | Home Care Allowance |
| HCA | Historic Cost Accounting |
| HCA | Human Centered Automation (cybernetics) |
| HCA | Heartland Christian Academy |
| HCA | Henkel Consumer Adhesives (various locations) |
| HCA | Housing Corporation Assessment (UK) |
| HCA | Helideck Certification Agency (UK) |
| HCA | Handyman Club of America |
| HCA | Head of Contracting Agency |
| HCA | Hypertrophic Cardiomyopathy Association (UK; now CMA) |
| HCA | Houston Communications Alliance |
| HCA | Harrells Christian Academy (Harrells, NC) |
| HCA | High-Contamination Area |
| HCA | Hybrid Channel Allocation |
| HCA | Hydrometeor Classification Algorithm |
| HCA | Humanitarian Ceasefire Agreement (Sudan) |
| HCA | Halifax Christian Academy |
| HCA | Horizon Christian Academy |
| HCA | Hochiminh Computer Association (Vietnam) |
| HCA | Humanitarian and Civic Action Projects |
| HCA | Hispanic Communicators Association |
| HCA | Hyperion Certified Administrator (Oracle) |
| HCA | Hydrographic Commission on Antarctica |
| HCA | Hazardous Communication Act |
| HCA | Hanford Contractors' Association |
| HCA | Hierarchical Constraint Automata (computer programming) |
| HCA | Hwa Chong Alumni (Singapore) |
| HCA | Hamilton-Clermont Cooperative Association |
| HCA | Hermit Crab Association (est. 2001) |
| HCA | Hummer Controlled Approach |
| HCA | Hockey Club des Aravis (French hockey club) |