MCB is an abbreviation for:

• Maidenhead Citadel Band of The Salvation Army
• Miniature Circuit Breaker, a relatively small circuit breaker fitted in consumer units and small distribution boards.
• Memory Control Block
• Methodist College Belfast, a voluntary grammar school in Belfast, Northern Ireland.
• The Muslim Council of Britain, an organisation promoting unity among traditional Muslims in the United Kingdom
• Molecular Cell Biology, a scientific journal published by the American Society for Microbiology
• Music Colony Bi-weekly, a music magazine in Hong Kong.
• Muslim Commercial Bank, a network of bank in Pakistan.

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