- DTCB stands for Diamond Trading Company Botswana (De Beers)
- DTCB stands for Dhaka Transport Coordination Board (Bangladesh)
- DTCB stands for Drug Treatment Centre Board (est. 1969; Ireland; formerly National Drug Advisory and Treatment Centre)
- DTCB stands for Dance Teachers Club of Boston (est. 1914; Watertown, MA)
- DTCB stands for Dancing to Christ’s Beat (Princeton, NJ)
- DTCB stands for Durrell Trust for Conservation Biology (UK)
- DTCB stands for Distributed Trusted Computing Base (Linux boot mechanism)
DTCB