APA may stand for:

• Administrative Procedure Act, an American statute controlling government agency actions.
• American Payroll Association
• Amateur Press Association
• American Philosophical Association
• American Planning Association
• American Psychiatric Association
• American Psychological Association, see also APA style
• American Psychopathological Association
• Antagonist Perpetrated Aggression see Tactical combat for APA Tactical Combat Directive
• Apache Railway (AAR reporting mark APA)
• Asian Pacific American
• Australian Progressive Alliance
• Auto-port Aggregation is a HP-brand of Port trunking products.
• In science fiction fandom an APA is a periodically collated fanzine (or specifically apazine) for which the pages are printed by each contributor on his own, and then sent to be collated and redistributed solely to the contributors themselves. (Derives from Amateur Press Association)
• Acolytes Protection Agency, the stage name of a former professional wrestling tag team in World Wrestling Entertainment made up of Bradshaw (John Layfield) and Faarooq (Ron Simmons)
• Apachean languages (excluding Navajo) (ISO 639 alpha-3, apa)

Apa is the name of a deity in Hinduism.

This page expands a two-letter combination or a three-letter abbreviation/acronym (TLA). It aims to include all uses.

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