WMD may refer to:
- Weapon of mass destruction, munitions with the capacity to kill large numbers of human beings indiscriminately
- Weighted mean difference, a measure in statistical meta-analysis
- Wetland management district, a type of conservation area
- Workers' Memorial Day to commemorate workers killed, disabled, injured or made unwell by their work
- World Maths Day, a global educational event
- World Metrology Day, a global annual event celebrating the signing of the Metre Convention in 1875
- World Movement for Democracy, an initiative to strengthen collaboration among those working to promote democratic values and institutions
- Westmead railway station, Sydney, Australia (New South Wales railway station code)
- Wymondham railway station, Wymondham, England (National Rail code station code)
- "Wipe Me Down", a 2007 rap single by Lil Boosie
- Mandabe Airport, Mandabe, Madagascar (IATA airport code)
- Wiggle-match-dating, also known as Wiggle matching
- The WYSIWYM Markdown editor, a JavaScript implementation of the Markdown language for HTML editing