NCA
NCA is a three-letter acronym, which may refer to the:
- Constitutional Assembly of Zimbabwe
- National Campaign for the Arts, a lobbying group for the arts in the United Kingdom
- National Capital Authority, a government authority involved in development planning for the Australian Capital Territory
- National Charter Association of Great Britain and Ireland, a radical campaigning organisation founded in the mid 1800s to foster the aims of Chartism
- National Cheerleaders Association, an organization that holds cheer camps and competitions.
- National Coffee Association, a United States coffee industry body
- National College of Arts in Lahore, Pakistan
- National Command Authority, a United States military term for the combined authority of the President and the Secretary of Defense
- National Communication Association, an American organization which works to promote the academic discipline of Communication Studies
- National Computerization Agency, a statutory agency for the purpose of promoting informatization and to support development of related policies for Korean national agencies and local autonomies
- Network Computing Architecture (disambiguation):
- National Conservation Area, a protected area managed by the United States Bureau of Land Management
- National Consumer Agency, is a statutory body that defends consumer interests in the Republic of Ireland
- National Cricket Academy, a cricket academy based in India
- National Crime Authority, former Australian criminal investigative agency
- National Cycling Association, a former sports governing body in Ireland
- Neighbourhood components analysis, a supervised classification technique
- Neon Claims Advantage, A insurance claims processing company that specializes in glass and body shoppes
- Network Console on Acid, allows remotely connected administrators to read and write directly to the console
- Network of Concerned Anthropologists, an independent ad hoc network of anthropologists seeking to promote an ethical anthropology
- New Classical Adventure, NCA record label editing classical CDs, Hamburg, Germany
- Nexus Computing Agents, trusted software programs in Microsoft's delayed NGSCB initiative
- Nicaragua's IOC country code
- Nice Côte d'Azur, the intercommunal structure gathering the city of Nice (France) and some of its suburbs
- Nigerian College of Accountancy, training institution in Jos, Nigeria
- Nippon Cargo Airlines, a cargo airline of Japan. NCA is its ICAO code
- Noise Control Act, a U.S. law more formally known as the Noise Pollution and Abatement Act of 1972
- Non-compete agreement, an agreement between an employer and employee prohibiting an employee from working for a competitor after separation
- Nortel Certified Architect (NCA), the highest Nortel Certifications
- Norwegian Church Aid, a Norwegian charity
- North Central Association of Colleges and Universities, one of six organizations that provide higher learning accreditation in the United States
- Nuclear Command Authority (disambiguation), A government body with authority over the deployment of India's nuclear weapons stockpile
- Nuevo Central Argentino, An Argentine railway company
- National Competent Authority