HRH is an abbreviation for His or Her Royal Highness, a style used by high-ranking members of royal families.
HRH or Hrh may also refer to: Aligarh Airport, Aligarh, Uttar Pradesh; IATA airport code H.R.H. (novel), a 2006 novel by Danielle Steel Health human resources, also known as human resources for health Hereditary renal hypouricemia, a benign medical condition Horsham railway station, West Sussex, England; National Rail station code HRH, a Rockwell scale of materials' hardness Hudson Regional Health, a hospital network in New Jersey Human Resources for Health, a healthcare journal Kinney HRH, a 2001 American helicopter McDonnell HRH, an unbuilt 1950 American compound helicopter for the US Marine Corps