AAPA or aapa may refer to:
- Aboriginal Areas Protection Authority, a statutory body protecting sacred sites in the Northern Territory, Australia
- Active Allothetic Place Avoidance, a behavioural task used experimental Biology, an alternative for Morris Water Maze
- American Academy of Physician Associates, the organization representing physician assisistants in the United States
- American Association of Physical Anthropologists, an American-based international scientific society of physical anthropologists
- American Association of Port Authorities, a trade association
- American Association of Public Accountants, former name of the American Institute of Certified Public Accountants
- Asian American Political Alliance, a political organization in the 1960s aiming to unite all Asian Americans to push for political change
- Association Against the Prohibition Amendment, a leading organization working for the repeal of prohibition in the United States
- Association of Asia Pacific Airlines, a trade association
- Association of Authorised Public Accountants, a British professional body for public accountants
- Australian Aboriginal Progressive Association (1924–1927), an Aboriginal advocacy body based in Sydney, Australia
- Australian Airline Pilot Academy, see Wagga Wagga Airport#Rex pilot academy
- Aapa mire or string bog, a type of raised bog