KTB

KTB can mean:
 * Cretaceous-Paleogene boundary also known as Cretaceous-Tertiary boundary
 * Khatib MRT station (station abbreviation KTB), Yishun, Singapore
 * Krung Thai Bank, state-owned Thai commercial bank
 * KTB ML(military logistics) Vietnam. since 1981 (Change to a start-up investment company in 1986)
 * ktb, ISO 639-3 code for the Kambaata language
 * KTB, IATA code for Thorne Bay seaplane base
 * K-T-B, triconsonantal root of a number of Semitic words
 * Kontinentales Tiefbohrprogramm der Bundesrepublik Deutschland (German Continental Deep Drilling Program), a German scientific project
 * KTB, stock symbol for Kontoor Brands