APA
APA is an abbreviation for:
- Acolytes Protection Agency
 - Acta Praehistorica et Archaeologica , German archaeological journal published since 1970, ISSN 0341-1184
 - Nobility examination committee of the DAG until 1945 (nobility law technical term), nobility examination, nobility law VdDA
 - Adirondack Park Agency , a New York state conservation agency
 - Administrative Procedure Act
 - Advanced Pricing Agreement , concerns advance agreement procedures between one or more taxpayers and one or more tax administrations in the area of transfer pricing
 - Agence de Presse Africaine
 - Agência Portuguesa do Ambiente , Portuguese environmental agency
 - Allocation personnalisée d'autonomie , care allowance in the French social security system
 - All points addressable , see graphics mode
 - Amateur Press Association
 - American pale ale
 - American Payroll Association
 - American Philological Association
 - American Philosophical Association
 - American Planning Association
 - American Plott Association , breeding association for Plott Hounds
 - American Plywood Association
 - American Poolplayers Association
 - American Psychiatric Association
 - American Psychological Association
 - American Psychopathological Association
 - Amerindian People's Association of Guyana
 - Antagonist Perpetrated Aggression , Martial Art
 - APA style, the Zitierrichtlinie the American Psychological Association
 - Apache Railway
 - Altmühltal Archaeological Park
 - Archived patient files
 - Aruba Ports Authority
 - Asia-Pacific Committee of German Business
 - Asset purchase agreement for the purchase of company shares in the course of an M&A transaction
 - Association pour la Photographie Ancienne et ses Techniques , international association for the maintenance of the "early methods" of photography
 - Foreign policy office of the NSDAP
 - Australian Physiotherapy Association
 - Australian Progressive Alliance
 - Austria Press Agency
 - Azəri-Press Agentliyi , Azerbaijan
 - Centennial Airport in the US state of Colorado according to the IATA code
 
Apa stands for:
- Afzelia pachyloba , African tree species
 - Apa (deity) in Hinduism
 - Apa (Satu Mare) , municipality in Romania
 - Apa Bane (after 354 - after 395), late antique Christian ascetic of the 4th century
 - Río Apa , river between Paraguay and Brazil
 - Father (film) , film by István Szabó
 
apa is an abbreviation for:
- Apache languages , South Athabaskan language (without Navajo) according to ISO 639 alpha-3
 - -apa , a Western European river name type, probably of pre-Germanic origin
 
Apa is the family name of the following people:
- KJ Apa (born 1997), New Zealand actor
 
aPa was the journalistic abbreviation of:
- Armon Planta (1917–1986), Swiss publicist and poet