MWD may refer to:
- Matte World Digital, an American visual effects company
- Measurement while drilling, a procedure used in oil well drilling
- Megawatt-day (MWd or MW·d), a measure of electric energy; see kilowatt hour
- Metropolitan Water District of Southern California, a bulk water supplier in California, USA
- Mianwali Airbase (IATA airport code), located at Mianwali, Punjab, Pakistan
- Military working dog, a dog trained for war
- Ministry of Women Development, one of the ministries of Pakistan
- Molecular weight distribution, a property of a polymer
- Murakami-Wolf-Dublin, a former name of Fred Wolf Films Dublin
- Myawaddy TV, a Myanmar television network