Het or HET can refer to:
- Acronyms
- Hall Effect Thruster, an electric propulsion device for space applications
- Heavy Equipment Transporter, a military vehicle
- Historical Enquiries Team, set up to review unsolved murders during the Northern Ireland Troubles
- Hobby-Eberly Telescope at The University of Texas McDonald Observatory
- Holocaust Educational Trust, a UK charity
- Human Enhancement Technologies
- Codes
- IATA airport code for Hohhot Baita International Airport
- Ticker symbol on the NYSE for Harrah's Entertainment
- In social sciences
- A heterosexual person (American English slang)
- The Het people, an indigenous people, living in the Pampas area of Argentina, or their language
- Heth, the eighth letter of many Semitic alphabets