WD may refer to:

  • the code for County Waterford, Ireland
  • DAS Air Cargo IATA code
  • Wardair defunct IATA code
  • WD postcode area, England
  • Band 3, a protein
  • Royal Canadian Air Force Women's Division
  • Walt Disney
  • War Department, a department of the United Kingdom, who stamped equipment, provisions, etc. with the letters "W.D."
  • WD-40, a penetrating oil spray
  • Web Dynpro
  • Weekday
  • "Well done" (internet slang)
  • Western Digital, a computer storage manufacturer
  • Western Economic Diversification Canada, a Canadian government agency
  • White Dwarf, a compact star in astronomy
  • White Dwarf (magazine)
  • Wilts & Dorset, a southern England bus operator
  • Winn Dixie
  • Withdrawal
  • Wikidot, a social networking service and wiki hosting service
  • Working directory
  • Working Draft, a stage in standardization process used by International Organization for Standardization
  • Whipple's disease, a rare, systemic infectious disease caused by the bacterium Tropheryma whipplei
  • Dodge Durango