Ade, Adé, or ADE may refer to:
In aeronautics:
- Ada Air's ICAO code
- Aden International Airport's IATA code
- Aeronautical Development Establishment, a laboratory of the DRDO in India
In geography:
- Adé, Chad, a city in Chad
- Adé, Hautes-Pyrénées, a commune in France
- Ade, Indiana, an unincorporated place in the United States
In other uses:
- Acoustic droplet ejection
- Ade (drink suffix)
- ADE classification, a mathematics classification
- Amsterdam dance event, an electronic music conference and club festival
- Adenine, one of the four nucleobases in the nucleic acid of RNA and DNA
- Adobe Digital Editions
- Adverse Drug Event
- Antibody-dependent enhancement
- Application Development Environment
- Arizona Department of Education
- Atlantis Diesel Engines
In people:
- Ade (given name)
- Ade (surname)