AAA might be an acronym or abbreviation for:
- American Automobile Association
- Analog/Analog/Analog (audio CD format, recording/mixing/mastering)
- Anti-Aircraft Artillery
- Abdominal Aortic Aneurysm
- Access All Areas (Sony music project)
- Access Approval Authority
- Accumulated Adjustments Account (US Federal Income Tax)
- Aces of ANSI Art
- Acquisition Approval Authority
- Action Awareness Alert
- Adaptive Array Antenna
- Adjust for ASCII Addition (X86)
- Administration, Authorization, and Authentication (Software Security)
- Advanced Acoustic Array
- AEGIS Acquisition Agent
- Aerospace Engineering, Applied Mechanics, and Aviation
- Against All Authority (punk band)
- Age Anaesthesia Association
- Agricultural Adjustment Act of 1933
- Agricultural Adjustment Administration
- Air Avenue of Approach
- Airborne Array Aperture
- Airborne Assault Area
- Aircraft Alert Area
- Airport Airspace Analysis
- Alaska Activities Adventures Plus Tours
- Album Adult Alternative (radio format)
- Allocations, Assessments, and Analysis
- Alternate Assembly Area
- Amateur Athletics Association
- American Academy of Actuaries
- American Academy of Addictionology
- American Academy of Advertising
- American Academy of Audiology
- American Accounting Association
- American Airlines Arena
- American Allergy Association
- American Ambulance Association
- American Anthropological Association
- American Arbitration Association
- American Armwrestling Association
- American Association of Anatomists
- American Audit Associates
- Anesthesia Administration Assembly
- Angle Angle Angle (geometric proof)
- ANSI Artists of America
- Anti-Acronym Abuse
- Antiaircraft Antiarmor (Weapon)
- Anticipative Adaptive Array (frequency-hopping communications)
- Antique Airplane Association
- Antique Automobile Association
- Anygame Anytime Anyplace (gaming clan)
- AOES (Advanced Orbital Ephemeris System) Accuracy Assessment
- Appraisers Association of America
- Area Agency on Aging
- Arkansas Ambulance Association
- Army Audit Agency
- Aromatic Amino Acid
- Asociacion Anticomunista Argentina
- Assign Alternate Area
- Association of Avatar Artists
- Astronaut-Actuated Abort
- Atheist and Agnostic Association
- Attitude, Awareness and Accountability (ski safety program)
- Australian Association of Accountants
- Australian Automobile Association
- Authentication, Authorization and Accounting (Cisco)
- Authentication, Authorization, and Accounting
- Authorization Accounting Activity
- Authorized Accounting Activity
- Automated Airlift Analysis
- Autoridad de Acueductos y Alcantarillados (Aqueduct and Sewer Authority, Puerto Rico)
- Awaiting Aircraft Availability
AAA is also a league in minor league baseball.