TTK may refer to:
- Kosrae International Airport, FAA LID
- the Third Ring Road (Moscow), abbreviated ТТК in Russian
- Tiruvellore Thattai Krishnamachariar (1899–1974), an Indian politician
- TTK Group, Indian corporate group founded by him
- TTK, the name under which TCL Technology was founded
- Totsuka Station, JR East station code
- Turkish Historical Association
- Turkish Hard Coal Enterprises
- TTK (gene)
- TTK, an abbreviation of two-tier Keir, as applied to Keir Starmer
ttk may refer to:
- Totoro language, ISO 639-3 code