CTB

CTB may refer to:


 * CTB/McGraw-Hill, a division of the McGraw-Hill Companies
 * California Testing Bureau, a division of the McGraw-Hill Companies
 * Catch the Beat, an alternative game mode in Dean "peppy" Herbert's osu! rhythm game
 * Canadian Tire Bank, the retail deposit-taking and credit card-issuing arm of Canadian Tire Corporation, Limited
 * Catch the bus, an internet slang for committing suicide
 * Cement-treated Base, a specific type of soil cement, used as a base
 * Ceylon Transport Board, the nationalised passenger transport venture in Sri Lanka
 * Cholera toxin B, a subunit of cholera toxin used for retrograde tracing
 * Christchurch Transport Board, a defunct municipal public transport operator in Christchurch, New Zealand
 * City of Thunder Bay, a Canadian town in Ontario
 * Citybus (Hong Kong), a public bus operator in Hong Kong
 * Coding tree block, a processing unit of the High Efficiency Video Coding (HEVC) video standard
 * Commonwealth of The Bahamas
 * Comprehensive Test Ban, the goal of the Comprehensive Test Ban Treaty
 * Cooper Tire & Rubber Company's NYSE ticker symbol
 * Crabtree Technology Building, a Brigham Young University building
 * Crash Thunder Buster, a finishing move of Jyushin Thunder Liger
 * .ctb, Color-dependent Plot Style Table, a file extension used by AutoCAD
 * Cut Bank Municipal Airport, IATA code
 * Ryan Giggs or CTB, the claimant in CTB v News Group Newspapers and CTB v. Twitter Inc., Persons Unknown