THH may refer to:
Hillingdon Hospital, west London, England (opened 1838) Tetrahydroharmine, a fluorescent alkaloid chemical Thomas Henry Huxley (1825–1895), English biologist The Helping Hand (halfway house), a rehab in Singapore Topological Hochschild homology, in abstract algebra The Haunted House (anime), a South Korean TV series (2016–2024) Danganronpa: Trigger Happy Havoc, a 2010 video game
See also
Haunted house (disambiguation)