HHT

HHT may refer to:

• Human-to-human transmission of infectious disease
• Headquarters and Headquarters Troop, in the U.S. Army
• Heinrich Hertz Submillimeter Telescope
• Heinrich-Hertz-Turm, in Hamburg, Germany
• Hereditary hemorrhagic telangiectasia, or Rendu-Osler-Weber disease
• Hilbert–Huang transform
• Hiphop Tamizha, an Indian musical duo
• Historic House Trust of New York City
• Historic Houses Trust, New South Wales
• Omega-hydroxypalmitate O-feruloyl transferase, an enzyme
• Howard Thompson (film critic), who wrote under the pen name HHT