OQ

OQ may refer to:


 * Chongqing Airlines, IATA code OQ
 * Queen Air, a defunct airline and previous user of IATA code OQ
 * Royale Airlines, a defunct airline and previous user of IATA code OQ
 * One Queensbridge, a supertall skyscraper expected to be built in Melbourne, Australia
 * Operational qualification, part of Verification and validation
 * A part of the V-Model of systems development
 * Officier (Officer) of the National Order of Quebec
 * Opera Queensland, Australia
 * A range of drones, including the Radioplane OQ-2
 * Peckett OQ Class of locomotives
 * Orienteering Queensland, a state-level sports body in Australia
 * OQ (company), an energy investment company headquartered in Muscat, Oman