| Acronym | Definition |
|---|
| NCA | National Command Authorities |
| NCA | National Communication Association |
| NCA | North Central Association of Colleges and Schools |
| NCA | National Crime Agency (UK) |
| NCA | Network Computing and Applications (IEEE International Symposium) |
| NCA | National Capital Area |
| NCA | Nippon Cargo Airlines (Japan) |
| NCA | National Children's Alliance |
| NCA | National Conservation Area (US Bureau of Land Management) |
| NCA | Norwegian Church Aid |
| NCA | Nippon Conditioning Association (Japan) |
| NCA | News and Current Affairs |
| NCA | National Credit Act |
| NCA | National Cemetery Administration |
| NCA | Noritake Coated Abrasive (Japan) |
| NCA | National Cosmetology Association |
| NCA | National Climate Assessment (interagency climate assessment) |
| NCA | Nemzeti Civil Alapprogram (Hungarian: National Civil Fund Program) |
| NCA | National Cheerleaders Association |
| NCA | National Carousel Association |
| NCA | NAFO (North Atlantic Fisheries Organization) Convention Area |
| NCA | National Constitutional Assembly (Zimbabwe) |
| NCA | National Consumer Agency (Ireland) |
| NCA | Nuclear Command Authority (various locations) |
| NCA | N-Carboxy Anhydride (cyclic organic compound) |
| NCA | New Covenant Academy (Springfield, MO) |
| NCA | National Celiac Association (Needham, MA) |
| NCA | Network Computing and Applications |
| NCA | Novell Certification Alliance |
| NCA | Network Caching Architecture |
| NCA | Network Cache and Accelerator |
| NCA | National Confectioners Association |
| NCA | National Council on Alcoholism (various locations) |
| NCA | National College of Arts (Pakistan) |
| NCA | National Coffee Association |
| NCA | Not Currently Available |
| NCA | National Club Association (Washington, DC) |
| NCA | National Candle Association |
| NCA | Network Computing Architecture |
| NCA | New Customer Acquisition |
| NCA | Network Cache and Accelerator (Solaris) |
| NCA | National Coastal Assessment (US EPA) |
| NCA | Network Communications Adapter |
| NCA | National Camp Association |
| NCA | Northern College of Acupuncture (UK) |
| NCA | National Cattlemen's Association |
| NCA | Northwest College of Art (Washington) |
| NCA | National Competition Agency (various locations) |
| NCA | Non-Compete Agreement |
| NCA | National Council on Aging |
| NCA | National Commission on Accrediting (various organizations) |
| NCA | National Craft Association |
| NCA | National Competition Authority (EU) |
| NCA | National Caving Association (UK) |
| NCA | Natomas Community Association (Sacramento, CA) |
| NCA | Norwegian Competition Authority |
| NCA | National Cleaners Association |
| NCA | National Committee on Accreditation |
| NCA | North Caicos, Turks And Caicos Islands (Airport Code) |
| NCA | National Coal Association |
| NCA | National Costumers Association (Indianapolis, IN) |
| NCA | Neighborhood Cleaners Association |
| NCA | National Caves Association (Kentucky) |
| NCA | National Courier Association (UK) |
| NCA | National Certification Authority (various locations) |
| NCA | Nagano Curling Association (Japan) |
| NCA | Netherlands Centre for Alternatives to animal use |
| NCA | Nursing Council on Alcohol (est. 2000) |
| NCA | National Council for Adoption |
| NCA | Narrow Coverage Area (US DoD Satellite Communications) |
| NCA | Noise Control Act of 1972 (US) |
| NCA | Nevada Cattlemen's Association |
| NCA | North Coast Aquatics (California) |
| NCA | National Canners Association |
| NCA | Neurocirculatory Asthenia |
| NCA | Network Control Analysis |
| NCA | National Constructors Association |
| NCA | Notice of Cash Allocation |
| NCA | Network Computer Architecture (Apollo) |
| NCA | Newport Collaborative Architects (Rhode Island) |
| NCA | National Cathedral Association |
| NCA | Non Current Asset |
| NCA | Nicaraguan Cultural Alliance |
| NCA | Nehemiah Corporation of America (Sacramento, CA) |
| NCA | Nortel Certified Architect |
| NCA | National Chamber of Agriculture |
| NCA | Northern Consultancy Association |
| NCA | Nashua Christian Academy |
| NCA | Nippon CSIRT (Computer Security Incident Response Team) Association (Japan) |
| NCA | Nebraska Counseling Association |
| NCA | Northern Cluster Alliance |
| NCA | Nursing Care Assistant (UK) |
| NCA | Northwest Capital Appreciation, Inc |
| NCA | Neurologic Chronometric Assessment |
| NCA | Normal Central Assistance (India) |
| NCA | National Communications Agency |
| NCA | National Coordinating Agency |
| NCA | Non Circumvention Agreement |
| NCA | Nuclear and Chemical Agency |
| NCA | National Council of Attractions |
| NCA | Number of Calls Abandoned (telephony) |
| NCA | Navy Counselor Association, Inc. |
| NCA | Not Camp Appropriate |
| NCA | No Circuit Announcement |
| NCA | Nebraska Cattlemen's Association |
| NCA | Nominee-Based Congestion Algorithm |
| NCA | Navy Center for Cost Analysis |
| NCA | Northern Communications Area |
| NCA | Nissei Corporation of America (Greenville, SC) |
| NCA | Neil Cerbone Associates, Inc (South Orange, NJ) |
| NCA | New Charter Academy (UK) |
| NCA | Norwegian Concrete Association |
| NCA | Network Control Agent |
| NCA | Node-Cooperation Algorithm |
| NCA | Marine Corps Air Station New River, Jacksonville, NC (airport identifier) |
| NCA | National Contest Association |
| NCA | Nikon Color Adjustment |
| NCA | Nurse Consultant Associates |
| NCA | Nepal Cultural Association |
| NCA | National Certification in Agriculture (UK) |