THI may refer to:
Businesses and organisations edit
- Technische Hochschule Ingolstadt, a German university
- Texas Heart Institute, an American medical non-profit
- Tim Hortons Inc., a Canadian eatery chain
Other uses edit
- Temperature-Humidity Index, in meteorology
- Thirsk railway station, England (by station code)
- Toomas Hendrik Ilves (born 1953), Estonian politician
- Traffic Homicide Investigator, in US law enforcement
- Tissue harmonic imaging, an ultrasonography technique