THT may refer to:
Science and technology tetrahydrothiophene, an organosulfur compound through-hole technology, in electronics manufacturing
Sport Talen Horton-Tucker (), American basketball player The Hardball Times, a baseball news website since 2004
Transport Thorntonhall railway station, Scotland, by GBR code Tamchakett Airport, Mauritania, by IATA code
Other uses Terrence Higgins Trust, a British sexual health charity, founded 1982 The History Teacher, a quarterly journal since 1940