QD may refer to:
Businesses and organizations QD (retailer), a chain of discount retail outlets in England Dobrolet (airline) (IATA airline designator QD), a Russian low-cost carrier JC International Airlines (IATA airline designator QD), a Cambodian airline
Science and technology Quantum dots, in nanotechnology N-Gage QD, a handheld game console and smartphone Dermatologicals, a veterinary ATC code D Queue depth, a measure of concurrency in SSD benchmarking; see IOPS Quick Disk, a type of miniature floppy disk used primarily in the 1980s
Other uses Quaque die, "every day" in Latin; mainly pharmaceutical usage Quarterdeck, a raised deck behind the main mast of a sailing ship The EU Qualification Directive (Directive 2011/95/EU of the European Parliament and of the Council of 13 December 2011 on standards for the qualification of third-country nationals or stateless persons as beneficiaries of international protection, for a uniform status for refugees or for persons eligible for subsidiary protection, and for the content of the protection granted)