DEU may refer to:

  • Deutsche Eislauf-Union, the figure skating governing body in Germany
  • Distinct Environmental Uniform, the current uniform of the Canadian Forces, adopted in the late 1980s
  • Doom Editing Utility, a software utility for the computer game Doom
  • The ISO 3166-1 alpha-3 country code for Germany
  • Drug Enforcement Unit, a specialised police unit
  • Dokuz Eylül University, a state university located in Izmir, Turkey