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:
Entertainment and media Acolytes Protection Agency, a professional wrestling tag-team Agency for the Performing Arts, a talent and literary agency Father (1966 film) ()
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: ) Azerbaijan Press Agency NSDAP Office of Foreign Affairs (Außenpolitisches Amt der NSDAP), a Nazi Party organization Peruvian Astronomy Association (Spanish: ), 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