QD may refer to:

  • Air Class Líneas Aéreas IATA airline designator
  • Queue Depth
  • Quantic Dream
  • Quantum dot
  • quaque die, a Latin phrase meaning "every day"
  • Quarter-deck, a part of a ship
  • Queen Dowager
  • Questioned Documents, the field of forensics that deals with the scientific examination of documents
  • Quick Detachable OR Quick Disconnect
  • Nokia N-Gage QD
  • Quill and Dagger, a Senior Honor Society at Cornell University
  • ATCvet code QD Dermatologicals, a section of the Anatomical Therapeutic Chemical Classification System for veterinary medicinal products