CAPB may refer to:

• Cocamidopropyl betaine
• EPH receptor B2, a receptor tyrosine kinases

• Institute of Chartered Accountants in England & Wales
• Institute of Chartered Accountants of Belize
• Institute of Chartered Accountants of Bermuda
• Institute of Chartered Accountants of India/Archive 1
• Institute of Chartered Accountants of India/Archive index
• Institute of Chartered Accountants of the Caribbean
• Institute of Chartered Accountants of The Caribbean
• Institute of Chartered Accountants of Trinidad & Tobago
• Institute of Chartered Chemists of Nigeria
• Institute of Chartered Shipbrokers
• Institute of Chemical Technology
• Institute of Chemical Technology in Prague
• Institute of Chemistry of Ireland
• Institute of Chemistry of Poitiers : Materials and Natural Resources
• Institute of Christ the King Sovereign Priests
• Institute of Civil Aeronautics of Cuba
• Institute of Civil Aviation of Mozambique
• Institute of Classical Architecture and Art
• Institute of Clinical Dentistry
• Institute of Clinical Dentistry (Oslo)
• Institute of Cognitive Neuroscience
• Institute of Commonwealth Studies, Oxford
• Institute of Comparative Law (McGill University)
• Institute of Comparative Law of Paris
• Institute of Competition Law