CTB may refer to:

• CTB/McGraw-Hill, a division of the McGraw-Hill Companies
• California Testing Bureau, a division of the McGraw-Hill Companies
• Canadian Tire Bank, the retail deposit-taking and credit card-issuing arm of Canadian Tire Corporation, Limited
• Ceylon Transport Board, the nationalised passenger transport venture in Sri Lanka
• Christchurch Transport Board, a defunct municipal public transport operator in Christchurch, New Zealand
• Citybus (Hong Kong), a public bus operator in Hong Kong
• Cooper Tire & Rubber Company's NYSE ticker symbol
• CTB International

• Cement-treated Base, a specific type of soil cement, used as a base
• Cholera toxin B, a subunit of cholera toxin used for retrograde tracing
• Coding tree block, a processing unit of the High Efficiency Video Coding (HEVC) video standard
• .ctb, Color-dependent Plot Style Table, a file extension used by AutoCAD

• City of Thunder Bay, a Canadian town in Ontario
• Commonwealth of The Bahamas
• Crabtree Technology Building, a Brigham Young University building
• Cut Bank Municipal Airport, an airport near Cut Bank, Montana, U.S., by IATA code

• Catch the Beat, an alternative game mode in Dean "peppy" Herbert's osu! rhythm game
• Catch the bus, an internet slang for committing suicide
• Comprehensive Test Ban, the goal of the Comprehensive Test Ban Treaty
• Crash Thunder Buster, a finishing move of Jyushin Thunder Liger
• Ryan Giggs or CTB, the claimant in CTB v News Group Newspapers and CTB v. Twitter Inc., Persons Unknown

This disambiguation page lists articles associated with the title CTB.
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