AEO
AEO may refer to:
- Authorized economic operator, a WCO standard to secure and facilitate global trade
- American Eagle Outfitters, an American clothing and accessories retailer
- Appearance event ordination, a dating system for land mammal fossils
- Alternative episcopal oversight, ecclesiastical systems through which certain churches are provided with a different bishop
- Adaptive Execution Office of DARPA (US military)
- Aioun el Atrouss Airport (IATA airport code: AEO) in Mauritania