OMC may refer to:
Business Oil marketing company
Organizations Odisha Mining Corporation, a state-owned mining company in Odisha, India OMC Shipping pte. ltd., a large bulk carrier, container and PCTC shipping company based in Singapore Omnicom Group (stock symbol) Outboard Marine Corporation Olifant Manufacturing Company of South Africa, now known as Land Systems OMC Acronym for the World Trade Organization in French, Portuguese and Spanish Osaka Medical College Oxfordshire Museums Council
Places Ormoc Airport in Ormoc City, Leyte, the Philippines
Musical groups OMC (band), a New Zealand music group formerly known as Otara Millionaires Club Old Man's Child, a Norwegian Black metal band
Technology Operations and Maintenance Centre, a controlling equipment for telecom networks Orange Monte Carlo, Android phone OpenModelica Compiler
Other Octyl methoxycinnamate, the active ingredient in sunscreens Open Method of Coordination, a means of governance in the European Union Ontario Medal for Good Citizenship Order of Civil Merit, one of Spain's highest honours Order of Cultural Merit "Ordinary muon capture" Outlaw motorcycle club