AIB may refer to:

• add-in board (in electronics applications)
• Admiralty Interview Board
• AIB College of Business
• Allied Intelligence Bureau
• 2-Aminoisobutyric acid
• Amplified in breast
• The Art Institute of Boston
• The Arts Institute at Bournemouth
• Association for International Broadcasting
• Association of Issuing Bodies
• Atlanta Interfaith Broadcasters
• Authenticated Identity Body

Business

• Academy of International Business
• American Institute of Baking
• Anti-inflation Board, Canada

Banking

• Afghanistan International Bank
• Allied Irish Banks, or its British subsidiary:
  • Allied Irish Bank (GB)
• Anglo Irish Bank

Charitable organizations

• American Institute of Bisexuality

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