DEU may refer to:
*Deutsche Eislauf-Union, the figure skating governing body in Germany
*''Diccionario del español del Uruguay'', the Dictionary of Uruguayan Spanish
*Uniforms of the Canadian Forces#distinctive environmental uniforms, distinctive 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 (German ''Deutschland'')
* The ISO 639-2 (T) and ISO 639-3 code for Standard German, Standard High German
* Drug Enforcement Unit, a specialised police unit
*Dokuz Eylül University, a state university located in Izmir, Turkey
{{disambiguation
