Eau or EAU may refer to:
* The French word for
water
*
Eau (trigraph), a trigraph of the Latin script
* EAU, the IATA code for the
Chippewa Valley Regional Airport in Wisconsin, United States
*
East Africa University, a private university in Puntland, Somalia
*
El Asher University, an undergraduate university in the Sharqia Governorate, Egypt
*
Emergency assessment unit (EAU), a short-stay department in a hospital
* Estimated annual usage (EAU)
*
European Association of Urology, a non-profit organisation of urology professionals
*
Initiative: Eau, an American nonprofit, non-governmental organization
*
River Eau, a tributary of the River Trent in Lincolnshire, England
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