ACA

ACA may refer to:

Arts and entertainment

 * A Current Affair (Australian TV series), an Australian television program
 * Actors Centre Australia, a private dramatic arts school
 * American Choreography Awards
 * American Composers Alliance
 * American Council for the Arts, now part of Americans for the Arts
 * American Country Awards
 * A.C.E (South Korean band)

Business

 * Alerting Communicators of America, an earlier name of American Signal Corporation
 * Angel Capital Association
 * Astronautics Corporation of America
 * Australian Coal Association

Government and politics

 * Affordable Care Act, shorthand for the Patient Protection and Affordable Care Act, commonly called "Obamacare"
 * Allied Commission for Austria
 * Anti-Corruption Agency, a Malaysian government agency
 * Australian Coal Association
 * Australian Communications Authority

Historical
 * Army Comrades Association, or "Blueshirts", a political organization in 1930s Ireland
 * Armed Peasant Association (Spanish: Asociación Campesina Armada), also known as Armed Campesino Group, a Marxist–Leninist Paraguayan rebel group

Organizations

 * Academic Cooperation Association, international body to promote cooperation in higher education, based in Brussels
 * Adult Children of Alcoholics, counseling and support group
 * Aero Club of America, US aviation group, now the National Aeronautic Association
 * African Cashew Alliance, international organization for promoting Africa's cashew industry
 * American Cadet Alliance, former non-government group for military cadet activities
 * American Chess Association, chess organization founded in 1857 and dissolved a few years later
 * American Citizens Abroad, non-profit group advocating for American expatriates
 * American Cryptogram Association, group for cryptographic puzzles
 * American Crystallographic Association, scientific society
 * Amputee Coalition of America, advocacy and support group
 * Analytica Chimica Acta, scientific journal
 * Anti-Communist Action, a far-right organization
 * NSC-131, a neo-Nazi group
 * Anglican Church in America, traditionalist Anglican church body
 * Army Comrades Association ("Blueshirts"), Irish militant right-wing group in 1932-1933
 * Association of Canadian Archivists, professional group for Canadian historical archivists
 * Atheist Community of Austin, Texas non-profit group which produces The Atheist Experience TV program
 * Automóvil Club Argentino, Argentina's largest automobile association
 * Automobile Club of America

Professional associations

 * ACA International, formerly the American Collectors Association
 * American Callers Association, association of square dance callers
 * American Camp Association, professional and trade association for summer (and similar) camp owners and workers
 * American Chiropractic Association, professional association
 * Australian Counselling Association, professional association
 * American Counseling Association, professional association
 * American Correctional Association, professional and trade association for prisons and prison officials and employees
 * Australasian Corrosion Association, Australia and New Zealand trade association
 * Austrian Cockpit Association, professional pilot organization
 * American College of Apothecaries, professional and trade association for independent community pharmacists

School

 * Academic Cooperation Association, international group promoting cooperation in higher education, based in Brussels

Science and technology

 * 7-ACA, 7-aminocephalosporanic acid
 * Azodicarbonamide, a chemical foaming agent
 * ACA, a codon for the amino acid threonine
 * Advisory Committee for Aeronautics
 * Anterior cerebral artery
 * Anti-cardiolipin antibodies
 * Anti-centromere antibodies
 * Acrodermatitis chronica atrophicans
 * Agile Combat Aircraft, forerunner to the British Aerospace EAP technology demonstrator aircraft
 * ACA0, an axiom system in reverse mathematics

Sport

 * Adventure Cycling Association
 * African Cricket Association
 * American Canoe Association
 * Argentine Cricket Association
 * Australian Cricketers' Association
 * AC Ajaccio, a French professional football team
 * AC Arles-Avignon, a French professional football team
 * Absolute Championship Akhmat, a mixed martial arts, kickboxing and Brazilian jiu-jitsu promotion based in Russia

Transport

 * Air Canada, by ICAO airline designator
 * Antioch–Pittsburg (Amtrak station), by station code, in Antioch-Pittsburg, California
 * Arctic Control Area, a Canadian airspace region
 * Atlantic Coast Airlines, later Independence Air
 * General Juan N. Álvarez International Airport, by IATA location identifier, in Acapulco, Guerrero, Mexico

Other uses

 * aca, the ISO 639 code for the Achawa language of Colombia
 * Arabic chat alphabet