HMT may refer to:
Science
- Hexamethylenetetramine
- Histamine N-methyltransferase
- Histone methyltransferase
- Host modulatory therapy
Places
- Ham Street railway station, in England
- Hang Mei Tsuen stop, Hong Kong
- Heathmont railway station, Melbourne
- Hemet-Ryan Airport, California, United States
Organizations and Companies
- HMT Limited (Hindustan Machine Tools Limited), an Indian watch manufacturer
- Hochschule für Musik und Theater Rostock, a music and theatre school in Germany
- Zurich School of Music, Drama, and Dance, later merged into Zurich University of the Arts
Other
- Hamtai language, spoken in Papua New Guinea
- Royal Navy ship prefixes:
- His Majesty's Trawler (see trawlers of the Royal Navy)
- Hired Military Transport, troopship
- ship prefixes for His Majesty's Transport/Troopship/Tug
- Abbreviation for HM Treasury