AAB may stand for:

  • Aalborg Boldspilklub
  • Aboriginal Affairs Branch (Canada)
  • Agence Africaine de Biotechnologie (Algeria, aab.org.dz)
  • Air Assault Badge
  • Air assault brigade (UK)
  • All-to-all broadcast
  • American Association of Bahrain
  • American Association of Bioanalysts (aab.org)
  • American Association for Bioethics
  • American Association for Bronchology
  • Anti-aircraft battery
  • Arbejdernes Andels Boligforening (Denmark, aab.dk)
  • Arizona Aryan Brotherhood
  • Army air base (USA)
  • Association of Applied Biologists (UK, aab.org.uk)
  • Asociación Andaluza de Bibliotecarios (Spain, aab.es)
  • Associação dos Arquivistas Brasileiros (aab.org.br)
  • Associazione Astrofili Bolognesi
  • Augsburger Aktienbank (aab.de)