TCT may refer to:
Science and technology Alfa Romeo TCT, a twin-clutch transmission made by FPT Industrial Teenage Cancer Trust, a British charity organization Thrombin clotting time, a test used in blood coagulation Tocotrienol, a group of four isomers occurring in Vitamin E True crystallization temperature, the temperature at which salt crystals begin to crystallize from a solution The Coroner's Toolkit, a suite of computer forensic software Tungsten carbide-tipped, hardened metal used for example in an annular cutter or drill bit TCT, a codon for the amino acid Serine
Transportation Tate's Cairn Tunnel, a Hong Kong tunnel Texas City Terminal Railway, a 32-mile-long railroad Trans Canada Trail, a proposed trail that would stretch across Canada Tung Chung Terminal, a Hong Kong gondola lift station of Ngong Ping 360
Arts and media The Catholic Transcript, a Catholic paper in Hartford, Connecticut, United States The Catholic Thing, a Catholic online publication TCT (band), a Finnish band Total Christian Television, a Christian cable television network broadcasting in the US and Canada (formerly known as Tri-State Christian Television) Tucker Carlson Tonight, the eponymous talk show of conservative political commentator and author Tucker Carlson which aired on Fox News from 2016 until 2023. The Campaign Trail, a game created by Dan Bryan
Other uses Touring Club de Tunisie, a member of the Fédération Internationale de l'Automobile