CSAB may refer to:
Cadbury Schweppes Americas Beverages Central Seat Allocation Board, Indian government agency overseeing admission into Government Funded Technical Institutes Colegio San Agustin - Bacolod, an Augustinian school in the Philippines CSAB (professional organization), an accreditation supporting organization, formerly called Computing Sciences Accreditation Board, in the United States CSαβ (Cysteine-stabilized alpha beta) defensins, a superfamily of proteins, also called cis-defensins