ROH can stand for:

  • "Radius of Hollow", a measurement of the depth of the hollow grind on the bottom of an ice skate blade
  • Revoluční odborové hnutí, a historical (1945-1990) monopolistic communistic labour union in former Czechoslovakia
  • Ring of Honor, a national professional wrestling promotion in the United States
  • Rohm and Haas, a major chemical manufacturing company
  • Royal Opera House, London, England
  • A generic alcohol
  • The ISO 639-3 code for the Romansh language
  • R-OH the symbol for the Alcohol group.