'''APA''' most often refers to:
* American Psychological Association ** APA style, a writing style guide from the American Psychological Association
'''APA''' or '''Apa''' may also refer to: {{TOC right}}
==Entertainment and media== * Acolytes Protection Agency, a professional wrestling tag-team * Agency for the Performing Arts, a talent and literary agency * ''Father'' (1966 film) ({{langx|hu|Apa|link=no}})
== Government and politics == * Administrative Procedure Act, a statute controlling administrative agencies of the federal government of the United States * Administrative Procedure Act (Switzerland) * Advance pricing agreement * Approved Publication Arrangement * Accredited parliamentary assistant to a Member of the European Parliament
==Language== * Americanist phonetic notation or the American phonetic alphabet * Southern Athabaskan languages excluding Navajo (ISO 639 code: apa)
== Organizations and businesses== ===Australia=== * APA Group (Australia), electricity generation and gas pipeline company * Aborigines Progressive Association * Australian Parkour Association * Australian Progressive Alliance
===Japan=== * Japan Advertising Photographers' Association * APA Group (Japan), a Japanese hotel chain
===United Kingdom=== * All Peoples' Association (1930–1936), a British organisation for international amity * Army Prosecuting Authority, former government body * Association of Publishing Agencies
=== United States === * APA – The Engineered Wood Association, formerly the American Plywood Association * APA Corporation, an energy company * A-P-A Transport Corp., New Jersey * Adirondack Park Agency, New York * Agency for the Performing Arts, a talent and literary agency * Allied Pilots Association, a labor union for American Airlines pilots * American Payroll Association * American Philological Association, devoted to Greek and Roman civilization * American Philosophical Association * American Planning Association, representing the field of city and regional planning * American Polygraph Association * American Poolplayers Association * American Poultry Association * American Protective Association, a former anti-Catholic organization * American Psychiatric Association * Anglican Province of America, a church * Austin Peace Academy, an Islamic school in Texas
=== Elsewhere === * Asian Pickleball Association * Association of Panamerican Athletics * Austria Press Agency (German: {{lang|de|Austria Presse Agentur}}) * Azerbaijan Press Agency * NSDAP Office of Foreign Affairs (''Außenpolitisches Amt der NSDAP''), a Nazi Party organization * Peruvian Astronomy Association (Spanish: {{lang|es|Asociación Peruana de Astronomía}}), in Peru
==People== * Apa (footballer) (born 2000), Spanish footballer * Apa of Slavonia, 12th-century Hungarian noble * Apa Sherpa, a Nepali Sherpa and famous Mt. Everest mountaineer * KJ Apa (born 1997), New Zealand actor
==Places== ===Asia=== * Apa, Acıpayam * Upu, a historic region surrounding Damascus (alternative transliteration) * The Hong Kong Academy for Performing Arts
===North America=== * Apache Railway, Arizona, U.S. (by reporting mark) * Anderson Preparatory Academy, a school in Indiana, United States * Centennial Airport, Colorado, United States (by IATA code)
===Other places=== * Antarctic Protected Area, several types of zone on Antarctica * Apa, Benue, a local government area in Benue State, Nigeria * Apa, Lagos, a locality in Lagos State, Nigeria * Apa River, frontier between Brazil and Paraguay. * Apa, Satu Mare, a commune in Romania
==Maritime== * ''Apa'' (ship), an ''Amazonas''-class corvette of the Brazilian Navy * Advance provisioning allowance * A retired US Navy hull classification symbol: Attack transport (APA)
== Science and technology == * Aldosterone-producing adenoma * All points addressable * Amplified piezoelectric actuator * Atypical polypoid adenomyoma * Apa, a type of Bronze Age sword named after the Romanian village
== Other uses == * Apa, Coptic form of Ab (Semitic) * Amateur press association, any group of people who self-publish material among themselves * American pale ale * Antarctic Protected Area, several types of place on Antarctica * Asian Pacific American * Asset purchase agreement * Australian Postgraduate Awards
{{disambiguation|geo}}