TK

• Ted Kaczynski (1942–2023), American domestic terrorist
• Tony Kanaan (born 1974), Brazilian racing driver
• Tony Khan (born 1982), American businessman
• Theodore K. Lawless (1892–1971), American dermatologist and philanthropist
• TK Cooper, English professional wrestler
• T. K. Oommen (born 1937), Indian sociologist, author, and professor

• Tehsil or taluk, an administrative division in several South Asian countries
• Tokelau (ISO 3166-1 country code)
• TK (South Korea) (Taegu–Kyŏngbuk), two administrative regions

• TK (Peruvian rock band)
• TK Records, a record label
• Tetsuya Komuro (born 1958), also known as TK, Japanese musician and producer
• Toru Kitajima (born 1982), also known as TK from Ling Tosite Sigure, Japanese musician

• Takeru "T.K." Takaishi, a character from Digimon anime
• TK, a character in Angel Beats!

• TK, an identification prefix for Imperial stormtroopers in the classic era of the Star Wars universe
• TK, the protagonist of the game Driver: Parallel Lines
• "Tk'tk'tk", a science-fiction short story by David D. Levine
• Tidens Krav, a newspaper published in Kristiansund, Norway
• Tom Kent (active 1970s–2000s), American radio DJ

• ThyssenKrupp, a German industrial conglomerate
• Turkish Airlines (IATA code TK)
• TK Maxx, the European arm of TJ Maxx

• .tk, the Internet top-level domain for Tokelau
• Tk (software), a GUI toolkit
• Telecine, a process of transferring motion picture film to video
• Thymidine kinase, a protein
• Transketolase, an enzyme in the pentose phosphate pathway and in the Calvin cycle
• Type 94 tankette, a vehicle of the Imperial Japanese Army
• Korovin pistol, a Russian semi-automatic pistol

• Bangladeshi taka, a currency
• Takate kote, a form of Box tie in Japanese bondage
• Tekken, a 2015 fighting game
• Telekinesis, an alleged psychic ability
• To come (publishing), commonly abbreviated as "TK"
• Traditional knowledge
• Turkmen language (ISO 639-1 language code)
• Transitional kindergarten, part of the California public school system
• {{lang|el|Ταχυδρομικός Κώδικας}}, Postal codes in Greece

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• KT (disambiguation)
• T (disambiguation)
• K (disambiguation)
• TKS (disambiguation)

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