AGU may refer to:
- Address generation unit, a component found in processors
- Advocacia-Geral da União, the office of the Brazilian Solicitor General
- Al Ghurair University, in the United Arab Emirates
- American Geophysical Union, an international organization of geoscientists
- Arabian Gulf University in Al-Manāmah, Bahrain
- Aspartylglucosaminuria, a rare genetic illness
- Lic. Jesús Terán Peredo International Airport (IATA airport code), located in Aguascalientes, Mexico