ACC most often refers to:

• Atlantic Coast Conference, an NCAA Division I collegiate athletic conference located in the US
• American College of Cardiology, a US-based nonprofit medical association that bestows credentials upon cardiovascular specialists
• Association of Corporate Counsel, a global organization serving attorneys who practice in corporate law departments
• American Chemistry Council, an industry trade association for American chemical companies

ACC may refer to:

• Australian Copyright Council, a non-profit organisation dedicated to promoting understanding of copyright law
• Advent Children Complete, the director's cut of the 2005 film Final Fantasy VII: Advent Children
• American Country Countdown, a weekly syndicated radio program about music
• Angel City Chorale, a Los Angeles choir
• American Craft Council, an American education-focused non-profit based in Minneapolis, Minnesota
• Arab Cinema Center, a nonprofit organisation promoting Arab cinema
• Asia Culture Center, a South Korean research institution and art venue
• Asian Cultural Council, a New York–based foundation promoting cultural exchange between the US and Asia

• Agenesis of the corpus callosum, when the brain's hemisphere-connecting white matter is missing or malformed
• Anterior cingulate cortex, the frontal part of the cingulate cortex
• Adrenocortical carcinoma, also called "adrenal cortex cancer"
• Adenoid cystic carcinoma (also abbreviated AdCC), a rare glandular tumor that primarily appears in the salivary glands
• ACC, one of the genetic codons of threonine
• Acetyl-CoA carboxylase, an enzyme that turns acetyl-CoA into malonyl-CoA
• 1-Aminocyclopropane-1-carboxylic acid, an intermediate in the biological synthesis of ethylene
• Aortic cross-clamp, a surgical instrument used in cardiac surgery to clamp the aorta
• American College of Cardiology, a DC-based nonprofit healthcare association that bestows credentials upon cardiovascular specialists
• Accredited Clinical Coder, an NHS-recognized professional designation in the United Kingdom

• Anglican Catholic Church, a body of Anglican Christians not in the Anglican Communion
• Anglican Church of Canada, a church of the Anglican Communion
• Anglican Consultative Council, an international body of the Anglican Communion
• Apostolic Catholic Church (Philippines), a self-governing church of Catholic Protestants originating in the Philippines
• Apostolic Christian Church, a church of Anabaptist origins
• Associated Catholic Colleges, a group of boys schools in Victoria, Australia
• Atlanta Christian College, now Point University, a university near Atlanta, Georgia, in the US
• Australian Christian Channel, a television channel in Australia
• Australian Christian Churches, also known as Assemblies of God in Australia (AOG)
• Australian Christian College, a group of schools in Australia

• ACC Limited, an Indian cement manufacturer
• Asia Cement Corporation, a cement company in Taiwan
• American Campus Communities, a private student housing provider

• Antarctic Circumpolar Current, an ocean current
• Anthropogenic climate change, a.k.a. anthropogenic global warming, climate change caused by humans
• American Conservation Coalition, a nonprofit environmental advocacy organisation

• Accreditation Committee of Cambodia, higher education quality and assessment body in Cambodia
• Accredited Clinical Coder, a vocational qualification in the UK
• Adamjee Cantonment College, an institution in Bangladesh
• Adirondack Community College, now SUNY Adirondack, a two-year college in New York in the US
• Allegany Community College, now Allegany College of Maryland in the US
• Alvin Community College, a community college in Alvin, Texas, in the US
• American Campus Communities, a private student housing provider
• American College of Cardiology, a non-profit medical organization
• American Craft Council, a non-profit educational organization
• Arapahoe Community College, in Littleton, Colorado, in the US
• Army Cadet College, a defence training establishment in India, now in Dehradun
• Asnuntuck Community College, a community college in Enfield, Connecticut, in the US
• Assiniboine Community College, a community college in Brandon, Manitoba, in Canada
• Atlanta Christian College, now Point University, a university near Atlanta, Georgia, in the US
• Austin Community College, a community college in the Austin, Texas, area in the US
• Australian Christian College, a group of schools in Australia

• Americans for Common Cents, a pro-penny lobbying organisation in the US
• ACCBank, an Irish commercial bank
• American Credit Corporation, renamed Barclays American
• Alaska Commercial Company, American retail and grocery company
• Associated Co-operative Creameries, or one of its successors:
  • ACC Milk, part of Dairy Farmers of Britain, and
  • Co-operative Retail Logistics, a division of Co-operative Group Ltd.
• Army Catering Corps, a unit of the British Army, formed in 1941, amalgamated into the Royal Logistic Corps in 1993

• Accident Compensation Corporation, a New Zealand state insurance agency
• Adelaide City Council, a local government area in the metropolitan area of Adelaide, South Australia
• Air Combat Command, the primary provider of air combat forces for the US Air Force
• Allied Clandestine Committee, a 1957 founded NATO organisation
• Allied Control Commission, or Allied Commission, a type of commission consisting of representatives of the major Allied Powers in World War II
• Allied Control Council, a military occupation governing body in Germany after the end of World War II
• Anti Corruption Commission Bangladesh, an independent, semi-governmental commission
• Appointments Committee of the Cabinet, a government committee that decides appointments to several top posts in the Government of India
• Arizona Corporation Commission, a public utility regulator in Arizona
• Army Cadet College, a defence training establishment in India, now in Dehradun
• Army Catering Corps, a corps of the British Army responsible for the feeding of all army units
• United States Army Contracting Command, contracting services provider of the US Army
• United States Army Corrections Command
• Assistant Chief Constable, a British police rank
• Australian Crime Commission, former name of one of the components of the Australian Criminal Intelligence Commission

• Ascending chain condition, a potential property of a partially ordered set
• ACC (complexity), a class of computational models and problems defined in circuit complexity
• ACC (programming language), a compiler for use under the MS-DOS operating system
• ACC Microelectronics Corporation, a defunct American semiconductor company
• AMD 700 chipset series § Advanced Clock Calibration, a technology that enables higher CPU clock speeds

• Arab Cooperation Council, an Arab economic organization set up as a rival to the Gulf Cooperation Council (GCC)
• Association of Conservative Clubs, an organisation associated with the Conservative Party in the UK
• Anti-Capitalist Convergence, organisations in North America which coordinated activities by the social justice, anarchist and environmentalist anti-capitalists
• The Atlantic Council of Canada, an NGO promoting the North Atlantic Treaty Organization (NATO) in Canada

• ACC Liverpool, an arena and convention centre in Liverpool
• Air Canada Centre, former name of Scotiabank Arena, in Toronto, Ontario, Canada
• Alpine Club of Canada, Canada's national mountaineering organization

• Associated Catholic Colleges, an Australian Schools Sporting Association
• Atlantic Coast Conference, an NCAA Division I collegiate athletic conference located in the US
• Athletic & Convocation Center, a University of Notre Dame facility

• Aberdeenshire Cricket Club, a cricket club based in Aberdeen, Scotland
• Asian Cricket Council, an organisation whose aim is to promote and develop the game of cricket within Asia

• AFC Challenge Cup, an international football competition for Asian Football Confederation (AFC) member countries
• Amway Canadian Championship, an annual soccer tournament contested by Canadian professional teams
• Asian Club Championship, an association football competition organised by the Asian Football Confederation

• Asian Cycling Confederation, the confederation of cycling's national governing bodies in Asia
• Assetto Corsa Competizione, the official PC racing simulation of the 2018 Blancpain GT Series
• America's Cup Class, a sailboat class

• Air Combat Command, a major command of the US Air Force headquartered at Langley Air Force Base
• Another Course to College, a pilot school in Boston, Massachusetts, in the US
• Area control center, a type of air traffic control facility
• Accra International Airport in Greater Accra Region, Ghana (IATA airport code ACC)
• Active clearance control, an engine temperature control

• Touring and Automobile Club of Colombia (Spanish: Touring & Automovil Club de Colombia), a motoring club and member of the Fédération Internationale de l'Automobile in South America
• Automotive Cells Company, a manufacturer for EV batteries in europe
• Active Cylinder Control, a variable displacement technology
• Autonomous/adaptive cruise control
• Automatic climate control, a type of automobile air conditioning

• Acton Central railway station, on the North London Line (station code ACC)

• Association of Corporate Counsel, an organization serving attorneys who practice in the corporate law
• American Chemistry Council, an industry trade association for American chemical companies
• Annenberg Center for Communication, a research center at the University of Southern California in the US
• Achi language, a Mayan language of Guatemala (ISO 639-3 code ACC)
• ACC, in linguistics, glossing abbreviation for accusative case, used for direct objects

• Accelerator (disambiguation)
• Accumulator (disambiguation)