THT may refer to:
- Tetrahydrothiophene
- Through-hole technology, category of electronic components
- The Hardball Times
- The Terrence Higgins Trust, British sexual health charity
- The History Teacher, a quarterly academic journal
- Thorntonhall railway station, Scotland, code
- Tamchakett Airport, Mauritania, IATA code
- Talen Horton-Tucker, NBA basketball player
