TKT could refer to:
Teaching Knowledge Test, an English teaching qualification The Killing Tree, an American punk band Transketolase, a human enzyme and gene Tak Airport, Thailand (IATA:TKT) Kathoriya Tharu, spoken in India and Nepal (ISO 639-3:tkt) Tampereen Kisatoverit, a Finnish multi-sport club
See also TKTS, ticket booths in New York City and London