# 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

## Aviation

* Advisory Committee for Aeronautics
* Aero Club of America, US aviation group, now the National Aeronautic Association
* Agile Combat Aircraft, forerunner to the British Aerospace EAP technology demonstrator aircraft
* Air Canada, by ICAO airline designator
* Arctic Control Area, a Canadian airspace region
* Astronautics Corporation of America
* Atlantic Coast Airlines, later Independence Air
* Austrian Cockpit Association, professional pilot organization
* IATA airport code for Acapulco International Airport in State of Guerrero, Mexico

## Business

* Alerting Communicators of America, an earlier name of American Signal Corporation
* Angel Capital Association
* 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
* 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
* 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
* Anterior cerebral artery
* Anti-cardiolipin antibodies
* Anti-centromere antibodies
* Acrodermatitis chronica atrophicans
* ACA$_0$, an axiom system in reverse mathematics
* All common ancestors (ACA) point, also known as the identical ancestors point

## 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

* Antioch–Pittsburg (Amtrak station), by station code, in Antioch-Pittsburg, California

## Other uses

* aca, the ISO 639 code for the Achawa language of Colombia
* ACA Neo Geo, a series of Neo Geo re-releases made by Hamster Corporation and SNK, derived from Arcade Archives.
* Arabic chat alphabet