OMH may refer to: Omh (trigraph), a Latin-script trigraph used in Irish musicOMH, a music website Office of Minority Health, an office of the United States government Office of Mental Health, an agency of the New York state government The Old Malthouse School, a closed preparatory school in Langton Matravers, Dorset, England Old Market Hall, Shrewsbury, an Elizabethan building in Shrewsbury, Shropshire, England Orange County Airport (Virginia), in Orange County, Virginia, United States (FAA location identifier) Urmia Airport, in Urmia County, West Azerbaijan Province, Iran (IATA airport code) Operation Midnight Hammer, a 2025 American military action against Iran