Roh or ROH may refer to:
- Roh (film), a 2020 Malaysian horror film
- Roh (name), a Korean surname
- Roh (historical region), in present-day Pakistan and Afghanistan
- Roh, Maré, New Caledonia
- Revoluční odborové hnutí, labour union in Czechoslovakia 1945–1990
- Ring of Honor, American professional wrestling promotion
- Royal Opera House, London, England
- Runs of homozygosity, a technical term used in population genetics
- Formula of a generic alcohol (substituent R, Oxygen, Hydrogen)
- The ISO 639-3 code for the Romansh language