Orm (in Old Norse and in modern Danish, Swedish, Norwegian (bokmål and nynorsk) the word for "snake", "worm" or "dragon") became an Anglo-Saxon personal name during period of the Danelaw.

Orm may also refer to:

• Orm or Ormin, the author of the Ormulum, a 12th century Christian text
• the commissioner of the Kirkdale sundial in 11th century England
• the Ocean Master, a DC Comics supervillain and half-brother to Aquaman
• Orm, the name of a dragon (and part of the name of other dragons) in the Earthsea series
• Orm (given name), with a list of people with this name

ORM as an acronym may refer to:

• Object-relational mapping, a software programming technique that allows accessing relational databases in the form of abstract objects
• Object-role modeling, a method for conceptual data modeling
• Oak Ridges Moraine, a geological landform in Ontario, Canada
• Observatorio del Roque de los Muchachos, an observatory on the island of La Palma
• Online reputation management
• Online research methods
• Operational risk management, a concept for safety in operations planning and execution
• Oromo language of the Horn of Africa (ISO code: orm)
• Orosomucoid, a glycoprotein
• Outsourcing relationship management
• Sywell Aerodrome in Northamptonshire, England (IATA airport code)