Loh may refer to:
- People
- John M. Loh (born 1938), Vice Chief of Staff of the United States Air Force
- Betty Loh Ti (1937–1968), Chinese actress
- Christine Loh Kung-wai, former Hong Kong Legislator and founder of the Citizens Party and Hong Kong Human Rights Monitor
- Sandra Tsing Loh (born 1962), Los Angeles, California-based author, actress and radio commentator
- Loh Boon Siew (1915–1995), also known as Mr Honda, Penangite tycoon and the founder of Boon Siew Honda
- Richard Loh
- F. Loh, the supposed composer of Der Flohwalzer
- Loh (Ramayana), one of the sons of Rama and Sita, also known as "Lava"
- Onz Loh, more widely known as Valerie Solanas, U.S.
- Places
In Switzerland:
- Loh, Switzerland, a part of Affoltern am Albis in the Canton of Zürich
In Germany:
- Loh (Glör), a part of Breckerfeld, North Rhine-Westphalia
- Loh (Bavaria), a part of Stephansposching in Bavaria
- Schwelm-Loh, a part of Schwelm in the Ennepe-Ruhr district, North Rhine-Westphalia
In the Republic of Vanuatu:
- Loh, an island of the Torres group in the Torba Province of Vanuatu, whose name is better spelled Lo.
- Others
- Loh Kooi Choon v. Government of Malaysia, (1977) 2 MLJ 187 is a case decided in Malaysia concerning the rights and freedoms guaranteed by the Constitution.
LOH may refer to:
- Large Object Heap, a programming term of .NET platform
- Legion of Honour, a French order
- Loss of heterozygosity, a genetics term
- Light Observation Helicopter, a US Army program from the early 1960s
- HAL Light Observation Helicopter
- Lostock Hall railway station, England; National Rail station code LOH