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, ISO 639-3 code for the Kambaata language
• KTB, an airline code (see list of airline codes)
• Thorne Bay seaplane base{{cn|date=March 2025}}
• Transaviabaltika
• 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

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