TDK Corporation is a Japanese electronics manufacturer.

TDK may also refer to:

• TDK Australian Audio Book Awards
• Team Dragon Knights, disbanded League of Legends team
• TDK Electronics, German subsidiary of TDK Corporation
• Mark Knight (musician)
• The Dark Knight, 2008 superhero film directed by Christopher Nolan
• The Detachable Kid (character), a DC Comics character; see List of DC Comics characters: A
• Turkish Language Association (Turkish: Türk Dil Kurumu or TDK), official authority
• TDK SC, a Japanese football team
• TDK - the IATA airport code for Taldykorgan Airport, Kazakhstan

• All pages with titles beginning with TDK
• All pages with titles containing TDK